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The name that means Treasure

TESORO ELECTRONICS, INC. · 715 White Spar Road · Prescott, Arizona 86303

Metal Detector Information

WELCOME to the 22nd edition of the Tesoro Electronics' Metal Detector Information (MDI) magazine.

The MDI has been a thirty-year journey to share stories, provide field tests, and guide customers to the metal detectors that satisfy their hunting needs. This MDI has a slightly different format. While we still have many guidelines and a few stories, we are reprinting field tests for all the available Tesoro products. These are field tests from previous MDI's or other sources, so you will see "reprint of" by most of the bylines. We hope that these field tests will help with your selection of Tesoro products, whether you are looking for your first machine or your latest upgrade. Since it's inception, Tesoro Electronics has been committed to providing lightweight, easy-to-use, high-value detectors through an independent and local dealer network. Tesoro backs these detectors with a LIFETIME warranty. We continue to build these quality detectors in the USA, at our plant in Prescott, Arizona. While the field tests are reprinted, all of our stories are current. We want to thank the people that shared their experiences with us and with the MDI readers. If you have an interesting experience you would like to share, please contact us at [email protected] Please enjoy the rest of the 22nd edition of the MDI Vince Gifford Tesoro Electronics, Inc.

ALL TESORO METAL DETECTORS FEATURE 10 kHz or higher Operating Frequency Heavy-Gauge Construction Audio Battery Test Interchangeable Searchcoils (except for Compadre) Lightweight Design Adjustable Pole Length Lifetime Warranty MICROMAX MODELS ALSO FEATURE Single 9-Volt Drop-in Battery 3-Piece Knockdown Pole MAXBoost Sensitivity Low Noise Circuitry Ultra-lightweight design WARRANTY ALL TESORO metal detectors are covered by a limited LIFETIME WARRANTY. This warranty covers parts and labor, excluding transportation charges, for as long as the detector is owned by the original retail purchaser.

TESORO ELECTRONICS, INC. reserves the right to modify or improve their designs without further notice.



Do You Have A Question?--by James Gifford ................................4 Pieces of History--by Mike Harvey .................................................11 Lobo SuperTRAQ Field Test--by Chris Gholson ..........................12 Lil' piece of El Dorado--by Sherry Spalding ................................15


Cover Photo: Thanks to Les and Carol Berg of Jobe Wholesale of California

Compadre Field Test--by Gordon S. Gibson.................................16 Silver Umax Field Test--by Ron Barnes.........................................18 Cibola Field Test--by Ron Barnes ..................................................20 Vaquero Field Test--by Ben Meyers ...............................................22 Tesoro Metal Detectors .....................................................................26 Lord of the Rings--by Ken Dewerson ............................................36

Special Thanks To: All contributing writers and our customers who gave us permission to print their testimonials. Published by: Tesoro Electronics, Inc. 715 White Spar Road Prescott, AZ 86303 (928) 771-2646

Sand Shark Field Test--by Ben Meyers..........................................37 Tiger Shark Field Test--by Andy Sabisch ......................................40 DeLeon Field Test--by Ron Barnes ................................................42 Golden Umax Field Test--by Joe Patrick .......................................44 Cortes Field Test--by Michael O. Smith .........................................46 Hawkeye --by Ben Marshall.............................................................49 Recommended Recovery Methods-by Robert H. Sickler .............50

© March 2010 Tesoro Electronics, Inc. All rights reserved. May not be reproduced in whole or in part without express written permission from Tesoro.

Tesoro Metal Detector Comparison Chart ......................................51 Can You Choose the Right Detector?--by Casey Stern...............52 Tesoro Does It Again--by Robert Terry .........................................54 Tejon Field Test--by Andy Sabish...................................................55 Treasure Hunter's Glossary-Adapted from W&E Treasures ........58 Metal Detectorist's Code of Ethics ..................................................60 Tesoro U.S. & International Distributors.........................................61 Tesoro Authorized Dealers...............................................................62


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James Gifford Answers Some Common Questions About Detectors

Do You Have A Question?

What is the best metal detector? This is probably the #1 question that I get asked. Unfortunately, there is no one single answer. Each metal detectorist has specific needs that cannot be answered by one single detector. The easiest way to find the "best" detector is to evaluate your detecting style, your experience level, and the time that you will spend hunting. After taking all of these things into consideration, then you will be able to find a detector that fits your needs and your budget. tation of the target in the ground, content of the target, and any outside interference, such as electrical wires and radio or cell phone traffic. Weather conditions, such as rain-soaked ground or even an incoming thunderstorm, may also play a part in the depth and sensitivity of any detector. With all that being said, an average detector using a stock coil in moderate ground should see the following targets with these ranges: Dime to nickel: Quarter to half dollar: Dollar to fruit jar lid: 4 to 8 inches 6 to 12 inches 8 to 16 inches How do I know where to dig? Once your detector beeps, you have to pinpoint your target. Pinpointing your target is a skill that is very important to practice and learn. The faster that you can locate your target, the more time you can spend searching for treasure. The technique for pinpointing varies depending on the type of coil that you are using. But the basics are the same. "Xing" the target with your coil is the most common type of pinpointing. To "X" a target, run your coil over the target and make a mental note of where the audio signal is the loudest. Start with your normal right to left sweep to find the loudest audio signal. You should shorten your normal sweep down to about two to four inches. Once you have a good idea of where the target is, run the coil 90 degrees over the target to tighten up the pinpointing. You can do this one of two ways. First, you can physically step to the left or right of the target so that the coil goes over the object using a normal sweep but turned 90 degrees. Second, instead of stepping to the side and sweeping the coil left to right, you can push and pull the coil forward and backward over the target. Try using both methods to find the one that works best for you. Pinpointing with a concentric coil: Most coin and relic machines use a concentric coil. These types of coils pinpoint in the physical center of the coil housing. Most concentric coils will have a hole in the center of the coil so it is easier to make the mental note of the location of the target. Pinpointing with a widescan or double-D coil: The widescan coil is slightly different from the concentric coil. By


How deep do detectors go? The answer to this question comes in two parts. The first part has to do with the detector circuitry and coil design. Environmental factors make up the second part of the answer. Coil and circuitry design determine the overall ability of a detector to find targets. During the design phase of any detector, the engineers decide which features to include. The things that they consider are the type of hunting and who will be using it. A beginner's model may not have the bells and whistles of the more professional models, but it will be easier to use. The more specific a detector's design, the narrower set of features it will have. Some detectors designed for the ultimate depth will be hard for a beginner to use or may be too sensitive to use in trashy areas. Coil size will affect the depth of the detector but may not be suited for a particular type of hunting. Environmental factors include just about everything except the detector and coil. Just a few of the things to take into consideration are the following: size and shape of the target, soil conditions, orien4

Knowing your detector and using it properly are the two most important things that you can do to get the best depth and sensitivity out of any machine.

How do you set up and use a metal detector? Whenever you are using a detector, comfort should be your primary goal. A detector that is easy and comfortable to use allows you to be in the field longer and to find more targets. The shaft of the detector should be adjusted so that the searchcoil is just off the ground when your arm is in a natural and relaxed position. Your hand should be lightly on the grip and your elbow straight but not locked. This initial setup allows you to swing the detector with an easy shoulder movement. The coil should move in an approximate three foot arc in front of you. This is called the sweep. While sweeping your coil, try to avoid swinging from the elbow.

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design, there is no center spot on the coil but a center strip of pinpointing area. The best pinpointing method is to use the very front of the coil or toe or the very rear portion or heel of the coil. Once you have gotten the signal, back the coil away from the target and use the toe of the coil to find the best signal. Pinpoint in the usual manner after that. To use the heel of the coil, push the coil past the target and use the end of the coil closest to you for the pinpointing. Regardless of the type of coil or the pinpointing method that you feel most comfortable with, practice will make you a better pinpointer and save you time and effort in the field.

High Output Technology combines the increased transmitted signal and the high gain amplification of the return signal to get the best depth and sensitivity out of our lightweight, compact detectors. When a detector becomes chirpy, the most common reason is the noise to signal ratio. Signal refers to the information being passed through the circuitry and noise is any type of other interference. As the signal is amplified, the noise gets amplified as well. At Tesoro, we use high tolerance components and design them into the circuit to create a lower noise to signal ratio.

What is Super Tune? Super Tuning is a technique to get better depth and sensitivity out of any machine that has an adjustable Threshold control. The Threshold control is normally used to set the level of hum in the All Metal mode. A light steady hum is usually desired so that any small or deep target will cause a change in the audio sound. To Super Tune a detector, put it in the Discriminate mode and turn the Threshold knob all the way to the clockwise position. At this point, the All Metal mode will no longer operate correctly, but you will see an increase in depth and sensitivity while hunting in the Discriminate mode.

What is High Output Technology? Most metal detectors work by sending out a signal, receiving it back, amplifying the return signal, and deciding whether or not to beep. One way of making the detector more sensitive is to increase the amplification of the return signal. This works well up to a point but can cause a machine to overload the circuits and become chirpy. Another way is to increase the initial signal going out, but once again, too much power and the signal will become unstable.


Can one detector really do it all? Most detectors are designed to excel at one type of hunting or another but can be used for other types of hunting as well. For example, most gold prospecting machines use some form of higher gain in the circuitry to get better sensitivity to small gold nuggets in the ground. While this is a good thing for prospectors, coin hunters may find it annoying that their detectors are picking up every bit of a pulltab that has been run over with a lawnmower. The art of metal detector design is the art of compromise. By accenting certain characteristics of any detector, you take away from other features. Any detector that does it all may not work as well for certain very specific treasure hunting. Talk to as many people as is possible and be realistic about your hunting needs. Finding a detector with the features that will best suit your hunting style is the most important choice you can make when deciding on a new detector.

The answers to these questions are connected, so I will try to answer them together. Generally speaking, the higher the price of a detector, the more features that it will have. More features translate into more knobs. The more features and/or knobs that a detector has, the more you are able to tune the detector to the type of hunting conditions that you are likely to encounter. With that being said, the downside to a large number of features is that even though you are able to fine tune the detector to match the local conditions, there are also more ways of setting up the detector incorrectly. Setting up a machine "wrong" may result in a decrease in depth and sensitivity and your $1000 machine may be outdone by a $200 one.

Are detectors with a lot of knobs better than those with just a few? How much better is a $1000 detector than a $200 detector and in what ways?

Will metered detectors find coins deeper than non-metered? The use of a meter on a detector is no longer any indication of its depth capabilities. When metered machines were the top-of-the-line machines, engineers matched the detectors with the best possible circuitry. With the advent of more cost effective digital signal processing and LCD displays, there are a number of units available that are inexpensive and have meters. While these detectors have acceptable depth, there are plenty of other machines that have better. The main thing to remember is that a metered machine will give an accurate audio signal on a target much deeper than an accurate meter reading. Air tests are a good indication of the ability of any display-type detector, but once the target is in the ground, there are several variables that may come into play affecting the reading. The most common is the fact that pulltabs and gold rings fall into the same area based on the mixing of alloys. The orientation in the ground can also cause some confusion for the detector. If you choose to get a metered machine, dig any target


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that gives a good audio signal regardless of the meter reading. You may dig up more trash, but in the long run, you will find more desirable targets.

What is Target ID and how does it work? Target ID is a feature that will give the metal detectorist more information about the target while it is still in the ground. It cannot tell you exactly what the target is due to the many variables present in an unknown target. A short list of these variables are as follows: the metal content of the target, the size and shape of the target, the target's orientation in the ground, the mineralization matrix of the ground itself, depth of the target, detector settings, and outside interference such as weather conditions, cell phone traffic, and electrical lines. All of these things can cause changes in the meter readings. A basic detector works by transmitting a signal and receiving it back. This creates a field of electromagnetic flux lines around the coil. As metal passes through the field, it breaks or distorts the flux lines. A simple discrimination circuit measures the amount of distortion or shift and beeps or doesn't beep based on the settings of the machine. During the design phase of any metered-style machine, the engineer measures the amount of shift that the most common targets cause and programs a microprocessor to respond with a meter reading for those types of shifts. The testing can include simple air tests, field tests in a controlled environment, such as a test garden, or even complex reports from several different field testers. But at some point, someone decides that a type of target shift represents a specific meter reading. While this information can give a detectorist a basis to dig or reject a target, it is in no way perfect.

Why are there so many types of searchcoils? There are two main types of search6

coils currently on the market--the concentric and the widescan. The concentric coil uses two round antennas, one inside the other. This coil is used on most detectors that are designed for coin, jewelry, and relic hunting. Concentric coils discriminate very well and pinpoint very easily due to the fact that the strongest signal is always in the center of the coil. Widescan coils use two D-shaped antennas that are placed back to back. Because of this configuration, they are also called "double-d" coils. The widescan coil is less affected by mineralization than the concentric, so it is generally used for gold prospecting or relic hunting in bad ground. Pinpointing is done with the heel or toe of the coil. After determining the type of coil that is best for your type of hunting, the next thing to consider is the size. There are many different sizes of coils available and each one may fine tune your hunting but only if you get the correct size. Larger coils go deeper than smaller coils but only on larger targets. When using a large coil, you may lose sensitivity to small targets. A large coil is also more susceptible to masking. Masking happens in the Discriminate mode when a good target and junk target are both under the coil at the same time. If the targets are close enough together, the bad target will be discriminated out, and at the same time, the detector will not be able to pick up the good target. Masking is very common in junky playgrounds and in-and-around old house sites. Smaller coils will concentrate the signal and make the detector more sensitive to the little targets. Unfortunately, smaller coils tend to lose depth when compared to their larger cousins. Being that these coils don't have as wide a search pattern, they are also less likely to mask targets in trashy hunting situations. Knowing where you are going to hunt and what you are hunting for will go a long way in helping you choose the right coil for your needs. A larger coil is needed when hunting in a clean area or when

hunting for relics that may tend to be deeper. A small coil will help find the smaller targets such as gold nuggets or fine jewelry or can be used when coin & jewelry hunting extremely trashy sites.

What is the difference between a wading coil and a regular coil? When hunting in water, most coils tend to float. As customers want lighter and lighter coils, most manufacturers will fill coils with some type of foam or other lightweight hollow material. This naturally creates air pockets inside the coils and tends to make them float. A wading coil is filled with one or more materials that have neutral buoyancy when placed in water. This keeps the coils from either floating or sinking and makes water hunting easier for the detectorist.

Are aftermarket "Hot" coils that are advertised any good and why don't the manufacturers make them? If you look closely at the advertisements of most so-called hot coils, you will find that they are slightly larger than the stock coils that they are replacing. As noted above, a larger coil may go deeper, but it has other drawbacks that may make it unsuitable for your particular style of hunting. Most manufacturers already make coils that are larger than the stock coils. These coils are specifically designed by the company engineer to match the circuitry of the particular unit that you are using. Why would you want to buy a coil that is not designed or built by the manufacturer?

How much discrimination should I use? In the late sixties and early seventies, as metal detectors became more popular, most of them on the market were all metal machines and could not discriminate any junk targets. As detectors became more


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sophisticated, the ability for discrimination got better and better. Now coin hunters can knock out the junk targets and keep the good ones in, or so they thought. Metal detectors judge targets based on their conductivity. Iron and silver targets are easy to separate because they are on opposite ends of the conductivity scales. However, the real struggle comes in the area of nickels, pulltabs, and gold rings. All of these targets are in the same area on the conductivity scale and can change due to the size, shape, and alloy of the target. For most coin and relic hunting situations, I recommend a setting just high enough to knock out the iron and foil. This allows you to get all of the other valuable targets without fear of having them discriminated out.

inate knob back to the low setting before continuing to hunt.

Is there a way that I can get more target information from a nonmetered machine? There is an easy way to find out more information about any target while it is still in the ground. When you get a target, shorten your sweep to about two to four inches over the target. As you move the coil over the target, slowly turn up the Discriminate knob. Check to see where the target goes away. Most detectors now have icons on the discriminate control representing the targets knocked out. This gives you the ability to make better decisions about digging any given target. The best way to start practicing this method is to do several air tests and see how your detector responds. When you have a good feel for what your detector is telling you, try it in the field. For the first couple of months, check the target with your Discriminate and see if you can identify the target. Dig every target and verify how correct you are. After a while, you will become very good at identifying targets while they are still in the ground. You will dig less junk and be a more successful treasure hunter. If you choose to use this method, always remember to turn your DiscrimTESORO ELECTRONICS, INC.

How do I set my Sensitivity control to get maximum depth? The Sensitivity control on most detectors is used to set the trigger point of any signal. The higher the Sensitivity setting, the smaller amount of signal a target needs to produce to have the detector give an audio signal. A very small or very deep target will not produce the amount of signal that a large or shallow target will. By increasing the sensitivity, the machine will give an audio signal to the smaller and deeper targets, but the detector may become too sensitive and start picking up ground effect or outside interference such as electrical lines or radio frequency noise. The easiest way to set your Sensitivity is to turn it up until the machine starts to chatter. When the machine chatters, turn the Sensitivity control back until the chatter just goes away. This will give you the maximum sensitivity without any excess noise. If you can turn your Sensitivity control wide open without chatter, leave it there. Your machine will be operating at its maximum power capabilities.

either with an analog or digital circuit. When using a notch filter, check the setup by doing numerous air tests before taking it out to the field. It is to your advantage to make sure you are aware of how your detector reacts to both good and junk targets. If your Notch can be adjusted, tune it to knock out the most common types of pulltabs in your area while keeping in the targets you wish to find. The initial setup can be a bit time consuming, but once it is done, you will be able to find less junk targets and keep the good finds.

What is Notch Filter Discriminate and how does it work? Notch discriminate differs quite a bit from regular discrimination. When using standard discrimination, the higher the knob is turned up, the more items that are discriminated out. As discussed before, when pulltabs are totally discriminated out, so are gold jewelry, rings, and nickels. Notch filter discriminate is designed to knock out some pulltabs and to keep the good targets in. It is virtually impossible to knock out all pulltabs and keep all gold jewelry. The reason is due to the conductivity of the targets in this range. A notch discriminate works by filtering or discriminating a band of target signals out without affecting targets higher or lower than the band. This can be done

What is ground balancing? Ground balance is a form of discrimination that cancels out the effect of mineralization. Ground balancing is the physical act of finding the balance point where the effects of the ground are neither too positive nor too negative. When a detector is set with a positive ground balance, it will react to the mineralization matrix just like a target. When this happens, you will get an audio signal and targets in the ground will be masked by the mineralization. If a detector has been set up with a negative ground balance, the detector is discriminating out the ground and will go silent. A severe loss of depth and sensitivity are the results. Finding the balance point between these two extremes is very important for the best operation of any machine. Most factory preset detectors are set just slightly positive. This will allow the user to work different types of soil conditions. A slight positive setting will also keep the detector from reading small ripples in the dirt and the hole you are digging to retrieve a target.

What is the difference between Preset, Manual, and Automatic Ground Balance? All VLF-style metal detectors have some form of ground balance or mineral


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rejection. This keeps the detector working as close to its peak as possible and not be affected by mineral masking. When reading literature on all of the detectors, it can be confusing as to what the detector is actually doing. Factory preset is the most common type of ground balance. It is used on most machines that are called "turn-on-and-go." The ground balance is set internally by a technician at the factory. It will work fine for most coin, jewelry, and relic hunting needs almost anywhere in the world. Factory preset does not require the user to do anything to set the ground balance. Manual ground balance is used on detectors designed to work in highly mineralized conditions. The ground balance is set by the user and is tuned to the local ground conditions. In bad ground, a manual ground balance can give you better depth and sensitivity than a factory preset. Unfortunately, if the ground balance is set incorrectly, a loss of depth and sensitivity will result. When working with a manual ground balance, constant attention is a must. If the ground conditions change, the detector must be retuned to the ground matrix to ensure the best operation of the machine. Manual ground balancing is a learned skill and must be practiced for best results. While manual and preset ground balance are pretty clear, automatic ground balance causes some confusion. In the earlier days of metal detecting, any machine that was not a manual ground balance was referred to as an automatic ground balance. The term was used because the detectorist did not have to tune the machine; it was "automatic." In the late 80s, several detectors were introduced that had microprocessor controlled ground balance. That is to say that the detector sensed the ground condition and reacted to change by adjusting an internal electronic potentiometer. True automatic ground balancing had arrived. Some manufacturers and dealers still use the automatic title for factory preset machines. If you have a question about whether or not any detector


is truly an automatic ground balance or not, check the machine with a mineral sample. If the machine actively tunes to the sample, it is an automatic.

What is the best type of ground balance? This is another question that involves an honest evaluation of your detecting needs. Most detectorists who hunt a few hours here and there for fun or those who are novices would probably benefit from a preset type of machine. There are fewer knobs to worry about and the setup time is very short. This means more time swinging the coil and more chances of finding targets. The more advanced detectorist or one who is hunting in very mineralized soil (gold prospecting or relic hunting) should get some form of adjustable ground balance. Manual ground balance is good for the avid hunter who wants to be able to tune the detector to his exact specifications. Depending on ground conditions and personal hunting habits, a slightly positive or negative ground balance can help the detectorist find targets. An automatic ground balance will always tune to its programmed parameters and can't be fine tuned to the user's specifications. Matching your detecting style and hunting habits to the type of ground balance of the detector will result in better finds.

Once the threshold has retuned, push the coil down to about one inch above the ground. One of three things will happen. The threshold noise will get louder; it will get quieter; it will stay the same. When the threshold sound stays the same, the detector is telling you that it is no longer being affected by the mineralization in the ground and you are ready to hunt. If the sound gets louder, you will need to turn the ground balance knob counterclockwise. If the sound gets quieter, turn the ground balance knob clockwise. Repeat the above steps until you find the spot where the detector no longer reacts to the ground and the threshold hum stays the same on the way down. If you have a manually adjusted machine, it is very important to make sure that you are very comfortable setting the ground balance. You can practice this in your backyard or anywhere you can find a small area with no metal targets in the ground. Spinning the knob one way and setting the balance, then spinning it the other and resetting the balance is a good way to practice this skill. If you practice this just five minutes a day, you will get very good at ground balancing.

How do I set up a manually adjusted ground balance detector? Most manually adjusted machines are easy to set up, once you have practiced the skill necessary. Start with the machine in the All Metal mode with the Threshold hum set low and steady. Lift the coil straight off the ground and allow the threshold to retune. Do not swing the coil in an arc off the ground. Moving the coil in an arc causes the machine to read the ground in an uneven manner and will complicate the ground balance procedure.

Can iron be rejected and gold nuggets still be found? Generally speaking, the best way to hunt for gold nuggets is to hunt in the All Metal mode. Nuggets, depending on their size, shape, purity, and orientation in the ground, will all create different signals. If you hunt in the Discriminate mode, some nuggets may be lost. The best way to get rid of iron is to search in the All Metal mode and then check the targets in the Discriminate mode. This allows you to search and find all of the possible gold nuggets. Checking the targets with the Discriminate mode turned up just high enough to knock out the small iron will give you much more information before you decide to dig. Practice this by doing air tests to see the best setting for your particular detector.


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My detector still finds large iron targets, even with the Discriminate set high. Is this normal? Most detectors can be fooled by some iron targets. There are two different ways that the machine can be fooled. Circular iron can fool a detector because of its shape. Any iron, such as a ring or washer or even bent nails, are hard for the machine to identify accurately. As the iron starts under the coil, it gives the same type of signal as a coin. When the target is directly under the coil, it reads as iron, then reads as a coin as the coil sweeps over it. In most cases, the detector may give a signal, but it will be a broken or chirpy signal. With a little practice, the broken signals will start to stand out from good repeatable signals. Large rusty iron can also give off signals no matter where the discrimination is set. When iron or any ferrous target is in the ground long enough, it starts to rust and break down. This causes a large halo of super mineralized dirt around the target. The halo is different enough from the surrounding ground matrix that the detector picks up a signal. The strength of the signal is so large that it momentarily overdrives the detector and it beeps. Signals of this nature usually seem bigger than the size of the coil. The best thing to do when getting either a broken signal or a very large signal is to dig the target. Most of the time, it will probably be junk, but every now and then, you will be happily surprised by a very unique target.

Is a crystal-controlled detector better than one that is not crystal-controlled? Most manufacturers use crystal resonators in their machines because of the tight tolerances of the resonator. If the part is listed as 15.7 kHz, all parts will be exactly that frequency. The downside of these super tight tolerances is that the detectors are more likely to crosstalk with each other. In other words, the transmit and receive signals from two or more different machines will start interfering with each other. Tesoro detectors use an LC or tank circuit to generate operating frequency. A capacitor and an inductor are paired together and create a naturally occurring efficient frequency. Variation in the capacitor and inductor cause slight variations in the operating frequency, which reduces the likelihood of crosstalk with other Tesoro machines. The variation is small enough that it does not affect the performance of the detector.

operating between 3 and 30 kHz will do a fine job for any type of hunting that is done. This frequency range gives good depth, target separation, and is not overly affected by ground mineralization. The ability to pick up good targets and separate trash from goodies is more due to the design of the detector, type of coils used, and several other engineering points that are brought up during the R&D phase. Comparing feature points of the detector model to the type of hunting you are planning to use it for will help you more than just comparing frequencies.

Why do some pennies read differently than others? The big difference is in the makeup of the actual penny itself. Older pennies, ones made before 1982, including the wheatback-style, are almost pure copper and will read up in the range of dimes and some other silver coins. The newer pennies are made mostly of zinc and tend to read in the screwcap range.


Are multi-frequency detectors better than single frequency types? The tank circuit described above generates a sinusoidal or SINE wave form. The SINE wave is efficient to generate and has no harmonics. Two frequency machines may combine a pair of SINE waves but are more likely to use a square wave. Multi-frequency machines almost always use a square wave or modified square wave. Square waves are rich in harmonics and take more battery power to generate. Harmonics generated by a square wave can be counted as individual frequencies and can be used to give more information as to target type and depth.

What is "crosstalk" and how can I avoid it? Crosstalk is the interference that is caused by two detectors operating on the same frequency being in close proximity to each other. Depending on the gain and signal strength of the detectors, crosstalk can happen anywhere from 3 to 15 feet of the two detectors. Crosstalk is most annoying when at a seeded treasure hunt. When you have a field with 50 to 100 or more hunters in it, you are bound to get at least one detector that is close enough to your frequency to cause crosstalk. Most manufacturers offer some sort of frequency shifter for coin hunt situations. Frequency shifters change the transmit and receive signals just slightly enough to keep another detector from interfering with yours.

What is the best frequency for my type of hunting? Contrary to popular belief, there is no one best frequency for any specific metal or metals. Any VLF-style detector that is

How much does the moisture in the ground have to do with detection depth? Moisture in the ground by itself has very little affect on the operation of a metal detector. Fresh water, such as rain or irrigation, is not much more conductive than the dirt it soaks into. Most metallic items in moist soil will start to corrode. As these items start to break down, they create a


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halo of super mineralized soil around the target. The halo effect makes the target appear bigger to the metal detector. Iron and other ferrous targets will corrode faster than other targets. Gold does not corrode, and silver, copper, and brass corrode more slowly than iron. So, while the halo effect will work on some targets, it will not work on all. Saltwater is a little different than freshwater. Due to its nature, saltwater is more conductive than fresh. This may give a little extra punch down into the ground but will also cause most machines to chirp and chatter quite a bit more. It is especially bad at the surfline on a wet saltwater beach. You can effectively tune out most saltwater effects when the saltwater is consistent (when the coil is covered by a foot or so of water, for example). Along the surfline, the waves are still washing up on the shore and the sand is drying out. This causes pockets of sand that may be higher or lower in conductivity than the surrounding area and can play havoc on your detector. It is best to hunt in the Discrimination mode with the Discrimination knob turned up high enough to knock out iron and foil. This will cancel out a good portion of the saltwater effects. You may also have to turn down your sensitivity to stabilize the detector.

What are the best headphones to use? Every detectorist has a slightly different style and likes a different type of headphone. For each style of hunter and hunting, there are several headphones. The most obvious difference is the earpiece. A lot of detectorists like the fullcup style. These phones fit completely over your ear and block out most of the background noise. They work well for when you are trying to hear the faintest of signals. The downside is that if it blocks out the surroundings, you may not hear snakes or other predators around you. On the other end of the scale are walkman or earbud-style headphones.


They will concentrate the signal in your ear but will allow you to hear the surroundings around you as well. Earbuds are also much cooler to wear during the hot summer months. Along with the types of cups are the ohm ratings and frequency ratings to consider. Headphones that are designed for listening to digital music have very high ohm and frequency ratings. They will allow you to hear greater nuances in the detector signals but are very expensive. Lower-priced headphones may not have the range of their higher-priced brothers, but considering that you are only listening for a beep, they work very well. If you are out in the field and accidentally break your phones, the inexpensive ones are much easier on the pocketbook. There are a number of headphones that have active electronics inside them as well. Most of these types of phones have some form of compression/limiter circuit in them. They work by amplifying weak signals and limiting the strong ones. They will work well for chasing some of those elusive small, deep targets but may make shallow and deep target signals sound the same. With all of the headphone choices out there, try as many as you can, think about the type of hunting that you do, and where you will be doing it. When you consider all of these factors, you will find the headphones that work best for you and your detecting style.

display. The increase in battery life will depend on your detector and hunting style.

Are rechargeable batteries better than alkalines? There are two aspects of rechargeable batteries to consider. The first is cost. Rechargeables are quite a bit more expensive than regular batteries, but the cost is offset so that you will not have to buy them as often. The second consideration for rechargeable batteries is the voltage. Most rechargeables have slightly lower voltage than their counterparts. Alkaline batteries have a voltage of 1.5 volts per AA cell. Most rechargeable batteries have a voltage of around 1.2 volts per AA cell. If your detector uses 8 AAs, you will have 12 volts with the alkalines and roughly 9.6 volts with the rechargeables. This should not affect your depth and sensitivity, it but will affect the time that you are able to hunt.

How much will using headphones increase the battery life? Headphones take much less current to drive than the speaker in the detector. This fact by itself would tend to show that you will increase your battery life by using headphones. But you have to remember that even though the detector is not making any noises, the electronic circuits are still running. A detector that generates a square wave or has a display will be using more power than a detector that is using a sinusoidal wave and has no

Are there any good places left to hunt? Most places that come easily to mind have probably been hunted to death. If you thought of that site, chances are someone else has thought about it as well. Doing research is the best way to find new places to hunt. Every city has some form of museum or historical society. This is a great place to start. Joining a local treasure-hunting club can help as well. Check with your local dealer to see if there is a club near you. You may also want to contact a national club such as the "Federation of Metal Detector and Archaeological Clubs," "American Metal Detecting Association," or the "Gold Prospectors Association of America." A national organization will have several local groups that will allow you to contact hunters that share the same interests as you do.



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Pieces of History

By Mike Harvey

Beep beep. Another signal com- and projectiles flash through my mind ing through the headphones. As I rest like a kaleidoscope. We begin the day the Tesoro Cibola against a tree and get by hunting through a stand of small my shovel ready, I wonder what can be pines in hopes of running across a waiting for me in the hole I am about to campsite. We find some shrapnel but do dig. I cut a plug and in the first shovel- not locate the elusive camp. ful, I see a three-ring bullet shining We load back up and drive to white against the dark Virginia soil. My mind wonders. Who touched it last? What was this doing on the side of a hill? When was this piece lost and why did I get Cibola Longview the signal and not someone else? One other question is also on my mind, "Are there more of these in the fort site in hopes of digging a this area?" I walk a few more steps and Confederate button. As I work my way get an odd reading that stirs my curiosi- over to a small hill that produced many ty. I repeat the above process, but this buttons in the past, my mind begins to time in my shovelful, I get a square visualize what this place may have head nail. I recheck the hole and get a looked like back in the 1800s. Beep, clear signal that surprises me due to the beep. I am brought back to the herefact that the original signal was so bro- and-now by a new signal. I dig down ken. I dig deeper into the hole and pop about seven inches and check the dirt I out an 1814 2 Reale at seven inches. have just taken out of the hole. No sigWhat a find! My mind again starts to nal. I check the hole and the target is wonder-who, what, when and why? still there. I dig down another seven More bullets, square head nails, and inches, check the dirt, and find I have a miscellaneous brass items make their piece of cannonball. I think to myself way into my pouch this day but tomor- how cool it is to be out here and finding row is another day and the best is yet to history. come. I reach the hill and stand for a Waking up early the next morn- minute trying to decide where to start ing, we (David my hunt. I begin Keith, Terry working on the Burnett, Dean opposite side of Gaylor, and I) load where most of up in the SUV and the buttons have head off to the Civil been found. I see War site we had a log on the hunted yesterday. ground that has Visions of more not been moved bullets, buttons, in a long time


due to its decomposed state. I decide to use my shovel to roll sections of the log out of my way so that I can search under it. After moving a section of the log about four feet long, I run my coil over the ground and get a faint broken signal. I dig down and at about eleven inches, I pull out a 1797 8 Reale with Chinese chop marks all over it, front and back. Who, what, when and why? My mind is racing trying to comprehend the piece of history I am holding. A couple of guys come up and ask to see the coin. Others ask if they can take a picture. Me....I'm just sitting on the ground enjoying the feeling of digging such a nice piece of history. After all the handshakes and pictures, everyone starts hunting my side of the hill in earnest. I recheck the hole and find the reason for the broken signal-two square head nails. I end up moving the rest of the log but find no other targets. What a weekend. I end up digging 38 bullets, 1 button, 2 pieces of shrapnel, horseshoes, square head nails, spikes, camp lead, an 1814 2 Reale, and the 1797 8 Reale. I also make new friends. During all the above hunting I used the Tesoro Cibola. What a great detector. Thank you Tesoro for making such a good machine.


Do your have a wonderful find with your metal detector? Do your have a story about you and your detector you would like to share? Let us know what it is and we may put in our next edition of the MDI


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by Chris Golson

Reprinted with thanks from Lost Treasure October, 2009 issue

Located in the heart of some of America's finest gold country, Tesoro Electronics of Prescott, Arizona, has been manufacturing quality metal detectors for nearly 30 years. Founded in the family garage in 1980 by Jack and Myrna Gifford, the family owned company set out to supply a good product at an affordable price while backing it with an unbelievable warranty. The idea worked and, since then, the company has prospered, becoming one of the most respected manufacturers in the industry. The reputation of their products and excellent support has continued to win over customers, and now Tesoro has dealers in virtually every U.S. state and several countries throughout the world. Ownership of the company has passed to their sons, James and Vince, but the original business philosophy set in place has not. In August of 2009, I had the pleasure of testing Tesoro's finest gold machine, the Lobo Super TRAQ. Since the Lobo is equipped with discrimination circuitry, it can double as a coin and relic hunter, but its primary purpose is sniffing out nuggets. The Lobo weighs in at approximately 3.5 pounds and operates at 17.5 kHz. It is supplied with a 10" elliptical widescan coil and features a built-in external speaker as well as a ¼" headphone jack. The Lobo is powered by eight AA batteries, which typically offer 20-30 hours of run time. As far as controls go, there are very few, making the Lobo an incredibly easy detector to use. All the knobs and switches are located on the front panel and readily accessible for quick adjust12

ment in the field. The first of the five controls is the THRESHOLD, which is used to turn on the detector and set the constant audio level or "hum" heard while detecting. The second is the Ground Selection Switch, which offers three possible settings: ALKALI, NORMAL, and BLK SAND. This switch alters the way in which the Lobo performs in different types of ground and will be discussed further. The third is the Mode Selection Switch. This 3-postion switch allows the user to toggle between PINPOINT (no motion needed), ALL METAL and DISC (or discrimination). The normal setting for this control while prospecting is the All Metal position. The Pinpoint mode is helpful for determining the location of a potential targets, while the Disc mode can be used to eliminate certain types of metallic trash targets. T h e fourth is the SENSITIVITY knob, which is used to either increase or decrease the detector's level of sensitivity. Like the Ground Selection Switch, this control is also important because it affects the size of targets that will be found, overall depth penetration, and how the Lobo performs in highly mineralized soil. This control will also be discussed further. The fifth and final control is the

DISC LEVEL. This knob adjusts the discrimination level, enabling the detector to accept or reject different types of metal targets. A low setting will allow most all metallic objects to produce an audible response, while higher settings will "blank" out typical trash items such as rusty nails, tin foil, bottle caps, etc. FIELD TEST The area I selected for my field test was first discovered in 1863 by a group of prospectors led by Captain Joe Walker. This famous gold deposit located in the northern Bradshaw Mountains is commonly referred to as the Lynx Placers and is, coincidentally, only a short drive away from the Tesoro Factory. Official records indicate production somewhere around 80,000-ounces, but since many prospectors did not report their finds in the early days, I would put the figure considerably higher. Many small nuggets have been found there, including larger pieces weighing as much as four ounces. Unfortunately, the use of motorized equipment is now prohibited anywhere on Lynx Creek, however, metal detectors and gold pans are still an acceptable form of prospecting. Detecting along the creek bed itself would seem a logical choice, but, after a century of heavy placer mining, it has become loaded along its entire length with bits and pieces of man-made trash.


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Items such as bullets, scrap iron, nails, bits of wire and pull-tabs are very common. Some of these targets have worked themselves deeply into the gravels and retrieving them can be quite a chore, and a disappointment. Rather than fighting my way through an endless supply of junk, I decided to hunt the surrounding hillsides and smaller tributaries that fed the main creek. These areas had produced gold for me in the past and, while I had never found anything large outside of Lynx itself, I knew I wouldn't be bending over to dig a piece of trash every few swings. The soil on the hillside contained an above average amount of mineralization, and I was skeptical as to how the Lobo would deal with it. After following the start-procedure outlined in the instruction manual, I found myself rather pleased. For being a VLF machine, the Lobo handled the iron-rich ground surprisingly well. One of the toughest challenges new detectorists face is the act of ground balancing. Fortunately, the SuperTRAQ System found inside the Lobo automatically performs this troublesome procedure. This self-adjusting ground balance technology is, in my opinion, one of the biggest selling points of this detector. SuperTRAQ senses changes in mineral content and automatically updates the ground balance. This saves time and frustration, but, more importantly, helps maintain a smooth and steady threshold ­ something all seasoned nugget hunters know is crucial for success. I started off with the Ground Selection Switch in the Normal position, Mode Selection in All Metal, Sensitivity at 10, and Disc level at minimum. I tried this for a while, but found it was necessary to reduce the Sensitivity to 7; I was getting too much feedback from the ground and picking up lots of hot rocks. Generally speaking, the more Sensitivity the better. In quiet ground, a


high Sensitivity setting will greatly improve signal response on both small and deeply buried nuggets. On the other hand, in bad ground, a high Sensitivity setting will cause the detector to become noisy, unstable, and overall performance will suffer. This is not a good scenario, as

valuable targets will be masked by the background noise. The key is finding a good compromise. I recommend that a person always start out high and, if the ground will allow it keep it there. If the ground is severe, it will actually be beneficial to run it lower. If reducing the Sensitivity doesn't alleviate the problem. Try switching into Alkali. According to Tesoro, this mode is similar to Normal except that the SuperTRAQ circuitry is allowed to operate over a much wider range of mineral conditions. In the area I visited, I felt the Lobo handled the soil better in Alkali and allowed a higher Sensitivity setting. Another bonus was its ability to greatly reduce the response I was getting from the hot rocks. After a few repeated sweeps of the coil, many of them virtually disappeared. If the areas you prospect are littered with hot rocks, the Alkali setting will certainly be worth a try. The BLK SAND (Black Sand) setting actually handles extreme ground and hot rocks even better than Alkali or Normal. It keeps the Lobo Running smoothly in highly conductive environ-

ments by reducing the detector's overall sensitivity. A handy option to have, but one that should be used sparingly, as it greatly diminishes the signal response on all targets. If the nuggets in your area are small or deeply buried, you will probably miss them in Black Sand, so always try Normal or Alkali first. Here are a few other observations I felt worth sharing, While out detecting, I did notice that when I lifted the coil a few feet above the ground, or hit a very large metal target, the ground balance would occasionally drift. Stopping and pumping the coil repeatedly over the ground easily fixed this problem. Typically after five "pumps" the ground balance returned to normal. Also, the Lobo is a motion detector. Unless the Mode Selection Switch is set to Pinpoint, a target will disappear if the coil is held stationary over it. For best performance, use a side-to-side sweeping motion rather than a front-to-back. Regarding the Disc mode, I did find that it would eliminate a bulk of the ferrous trash which plagues the goldfields. Being able to reject iron is nice, but this ability comes at a price. From my experimentation, I noticed that small nuggets would generally not respond at all if Disc levels were higher than 2. Larger nuggets would respond, but the signal generated was broken and, if a person were sweeping t o o fast, they

could easily be missed. Also, if a piece of trash was lying in close proximity to a nugget, the trash usually overpowered the gold and the detector would blank both signals. If you


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plan on chasing coins and relics, the Disc mode definitely has its place. However, if gold is your primary focus, I strongly suggest putting the Mode Selection Switch in All Metal and leaving it there. My field test produced an assortment of items, including numerous lead bullets, and old buckle, several jacket buttons, small BB's, and collection of rusty iron scraps. Luckily mixed in amongst these goodies were also three small gold nuggets. My search of the hillsides proved unsuccessful, but as I wandered down a narrow, bedrock-filled gully my fortune changed. The first decent signal seemed to be coming from atop the bedrock itself. As I bent down and blew away the sand I actually saw it wedged in a tiny crack. If a good flash flood had come through and stripped away the sand, I may have spotted it on the surface. It weighed 0.4-grams- not a bad start. The second and third nuggets came from further down the gully. As I swept over a series of deep cracks I received a mellow, but distinct "ZIP". I removed close to three inches of debris and, instead of the dull color of lead I was expecting to see, I was rewarded with something butter yellow! After coaxing the nugget form its hiding place I was excited, yet at the same time disappointed. Based on the strength of the signal response I was expecting it to be a little bigger. Before walking away I decided to recheck the hole; something I was very glad I did. Lo and behold there was another signal. I pried the crack open a bit more with my pick and spotted the source of the noise. It was indeed another nugget that had become wedged beneath the first. The two of them together weighted 1gram, which is why the signal had sounded sweeter. Finding multiple nuggets in a single hole always puts a smile on my face. My treasures won during the field test weighed in at 1.4-grams. Not a bonanza, but it proved a point, The Tesoro Lobo Super TRAQ is indeed fully capable of finding gold. CONCLUSION My overall impression of the Lobo was positive. It offers great sensitivity


and an automatic ground tracking system that really works. The detector is also lightweight, well balanced and a pleasure to swing. The ease of operation makes this model an excellent choice for first time detector buyers. To use, simply turn on the detector, select the all Metal mode, adjust Sensitivity and Threshold, and begin hunting- it's that easy! More experimentation with the settings will yield better results, but even the most inexperienced detectorist should be able to get up-and-running with little difficulty. If I had to find a fault it would be the fact that the coil is not supplied with a skid plate. A skid plate is the first line of defense against coil damage, so it seems only logical that one should be supplied. I also didn't care for the battery system. The battery packs tended to rattle around in the compartment and I wasn't a fan of the removable plate on the rear panel. I would suggest a hinged door and possibly exploring the option of developing a rechargeable pack that could be topped off in the field using a vehicle's 12V outlet. Aside from this, I was impressed. Tesoro has built a product they can be proud of, especially when you factor in their unbeatable Lifetime Warranty. With a suggested retail price of only $799 and the company's outstanding reputation, this detector provides solid performance at a reasonable price. Not to mention it is made right here in the USA! For more information on the Tesoro Lobo Super TRAQ, visit the company's website at or call 928-771-2646 and tell them you saw it in Lost Treasure magazine, For additional information on prospecting for gold with a metal detector, also visit the author's website a .


Great Treasures

I have been metal detecting for approximately 5 years. In March of 06, I went to a gold show in Redding, CA. This was my first introduction to Tesoro detectors. After attending a general metal detecting seminar put on by one of your salesman, I became interested in your product. The event was two days and I got the chance to ask a lot of questions. At the end of the event, there was a raffle for a Tesoro Lobo SuperTRAQ. Though I did not win the Lobo, my father-in-law did, so I got to play with the machine from time to time. After a lot of research and not being able to stand it anymore, I bought the Cortés and I am glad I did. Even though the transition from my old machine to the Cortés took a little while to figure out, I wouldn't give it up now. The transition I am talking about is how the two machines read things differently, but after a few tests, I had it nailed. Once I bought the Cortés and started finding more and more things, my partner decided he had to upgrade, but he did not buy a Tesoro; he bought another brand. After side-by-side competitions since August, I would have to say the Tesoro is easier to run with less trash. My opinion is that everyone from experienced to rookie at metal detecting should own the Cortés. It is virtually a turn-on-and-go machine. Thank you, Tesoro, for building a wonderful product.

The Treasure Hunter's Glossary will help clarify any confusing metal detecting terms. Definitions begin on page 58.

Nathan Spalding Susanville, CA


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A Lil' piece of El Dorado

By: Sherry Spalding

Let me start off by telling you that getting out and seeing the sites is only part of the adventure. Learning new thing and keeping your mind open for the impossible will keep you young forever. Everyone in the treasure world has heard of the mythical or shall we say the legendary Lost City of Gold or the Holy Grail or in this case, El Dorado. There are many stories out there, some with facts and others with, well, they're more campfire stories than anything. What I am about to share with you is no campfire story, well soon it will be. This spring I went on a family outing with my parents, my husband, and my two children. Our destination was deep into the Nevada desert. Our goal was simple relaxation, exploration, and in the case of my father and husband, playing with their metal detectors. The first day we setup camp and discussed a plan for the following day. The next day surprised us with a snow storm. I along with my mother and my kids decided to stay in the trailer and play games. My father and husband had other thoughts. No rain, sleet, or snow was going to keep them in the trailer. They grabbed up there metal detectors and they flew up the mountain. Around noon my father and my husband came back to camp. They both came in with a disappointed look on their faces. But not for long, my husband couldn't keep it in any longer and immediately produced a ¼ ounce gold nugget. My husband has been metal detecting for around 7 years and this was his first nugget he has found with a metal detector. He found it with his Tesoro Cortes which is a coin machine. As quick as they came into camp, they were gone again.


The snow stopped, but it was still bitter cold outside. While visiting inside the trailer I continued looking out the window. My mother, like all mother 's, could see the depression in my eyes. She asked me if I wanted to go metal detect with the boys, and I told her I was fine, besides I didn't have a detector. Mother's doing what mother's do, produced her brand new Tesoro Lobo Super Traq and said go play. I told her I didn't know the first about metal detecting. She said nonsense and gave me a crash course on it. I was amazed at how easy it was to use. I bundled up my son and we headed for a draw. Almost immediately we started finding targets. I found square nail, boot tacks, and rusty cans, nothing to write home about, but we were having fun. About a quarter mile up the draw, the Super Traq made a loud whining noise. I started digging expecting to find a rusty can. I dug down about four inches and ran the Super Traq back over the hole. The signal was still there, so I dug another four inches. This time it was gone. I ran the detector over the dirt I took out of the hole and I found the target again. I searched through the pile and couldn't find the rusty piece of metal. I then started running handfuls of dirt over the coil while throwing the rocks off to the side. I went through the entire pile and nothing. I remembered my husband talking about ghost target and I figured that must be it. As I started to stand up I set the Super Traq of to the side, near the rocks I had been throwing off to the side, and it whined. I was a little

bewildered. I then started running each individual rock over the coil until I found it. The rock was a muddy white rock. I started rubbing of the mud and to my surprise, the rock had viens of yellow running throughout it. I let out a scream and my son said is that gold and I said I think so. I never ran so fast in my life. We ran all the way back to camp. My husband and father just beat us to camp and they just stood there while I ran screaming to them. When I got to my husband I handed him the rock and said is this what I think it is. You should have seen the disbelief in his eyes when I handed him the 10.55 ounce quartz rock, I had just found laced in gold. He looked at me as if, how can a person that doesn't even know how to turn on the machine, find something like this. Well I will tell you, Tesoro. That is all that needs to be said. When a novice explorer, that doesn't even know what she is doing, finds something that has been sought after since time began, that's something, that's Tesoro. Did I mention up until a couple of hours prior my husband had found the biggest nugget my father had seen in that area. Well at least he got to gloat for that amount of time. And did I mention my father has been in these hills for six years searching for this little stone with one of those three thousand dollar machines. Even though I still do not own a metal detector, I hope that someday I will. That is if my husband will allow me to go with him again. Get out there and explore. You will never know what you will find until you do, and just maybe you can bring home a Lil' piece of El Dorado of your own. MDI


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by Gordon S. Gibson

Reprinted from MDI 17

- A Family Fun Detector

The Compadre comes with an ABS lower pole, metal middle pole, upper pole, and control housing. The stem comes with the more advanced Positive Pole Lock System. This Positive Pole Lock System will ensure that there is no movement or wobble of the stem when searching. When the stem is retracted to its shortest length, the distance from the coil to the end of the armrest is 38 inches. This is just about the perfect length for a child to use comfortably. When the stem is fully extended, it measures 53 inches. This would be perfect for any professional basketball star. So, this detector can fit anyone! The discriminate knob has the following markings: Off, All Metal, Iron, Foil, 5¢, Pull Tabs, 1¢ Zn, Max. The "Max" setting will only respond on silver, clad, and copper pennies. These markings indicate what will be tuned out below that setting when hunting. If you place the indicator on "5¢", then Iron and Foil will not respond with an audio sound. Everything counterclockwise from where the indicator is located will be rejected. The All Metal Mode will detect all metals as long as the coil is kept in motion. This really is a versatile, low cost, high quality detector.

Some metal detecting friends of mine were sitting around drinking coffee and I asked the question, "Can you name one company, besides Tesoro, that makes a low cost, lightweight, high quality, easy-to-operate detector that comes with a lifetime warranty and can be used by the whole family including everyone from the kids to granddad?" No one could think of a company! The detector from Tesoro I was thinking about was the Amigo II. I gave my grandsons an Amigo II and have spent several wonderful hours watching them hunt for treasure. Kids just naturally love to dig-and why not? They are closer to the ground than adults. The problems with most detectors are they are too heavy, too complicated, and too long for children to use comfortably. It is hard to find an inexpensive, quality detector that can be used by both children and adults. The Amigo II is a detector you can take on a family outing and just have fun! When James Gifford called and wanted me to field test the new Compadre (the replacement for the Amigo II), I readily agreed. I wanted to see if this detector could hold up to the Amigo II as the new family fun machine.

detector is built on the same frame as the µMax detectors but does not incorporate the same circuitry. The control housing is of the µMax style and has one rotary control knob. This knob is the "Off-On" switch, Battery Check and Discriminate Control. When the knob is turned on, you will hear an audio tone that indi-

Let's Take a Closer Look at the Compadre

The Compadre is a singleknob, 10 kHz motion-based discriminator detector. This means you will need to keep the coil moving when you search. It weighs only 2.2 lbs. and uses a silent search mode of hunting. This


cates the condition of the battery. A five to seven second audio tone indicates that the battery is in good condition. When there is a short or no audio tone, then the battery needs to be replaced. The battery compartment holds a 9-volt battery, which will give about 20 hours of use. If headphones are used, you can expect even more battery life. The Compadre has a small speaker on the front panel and a ¼ inch headphone jack on the rear of the control housing. Changing batteries is a snap! Just open the battery door and drop in the battery. No more fumbling with snaps and wires. The coil is a seven inch waterproof, hardwired, solid concentric coil. This is the ideal size for most hunting situations. It offers excellent trash separation and gives very respectable depth.

Let's Try Out The Compadre In The Field

I am not a big advocate of air tests, but using a zinc penny with the Discriminate Knob set on the "Foil" position, the Compadre would give a good strong signal at a measured 7 inches. That is a very respectable depth, but I was more interested in how the Compadre performed in the field. Tesoro is famous for its discriminating circuitry, and I wanted to know if the Compadre would hold up to that reputation. There is a park near my house that has the potential for older coins and


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is heavily worked by detectorists. I noticed they were doing some dozer work on a streambed and remembering the sage advice, "Follow the dozers," I decided to start in this park with my tests. This park ranges from medium to heavy in the trash category, so I set the discriminate knob to just below "1¢ Zn," and I immediately started to get signals on good targets. Pinpointing is very easy. Just make an "X" with the coil over the target and the target will be where the two lines intersect. I began finding pennies and clad coins near a playground swing set with the deepest coin at about 4 inches. I moved to the area where the dirt had been scrapped off and immediately found a silver Roosevelt Dime and later on, Wheat Pennies. This dime was at least 5 inches deep. I learned that I could operate in the All Metal Mode and when I got a signal, I just turned the Discriminate Knob with my thumb and raised the discrimination until the signal stopped. This gave me a good idea of what the target might be. This may sound awkward, but it was actually very easy to do. This detector will produce coins! My next test was a hunt with two friends of mine at an older area of town where they were clearing the land to build modern structures. It was a misty, "off and on" rainy day. The ground was as trashy as I have ever encountered, but the 7-inch coil on the Compadre worked great in this environment. We hunted for two hours digging a lot of trash before being driven off by the rain. My friends were using high dollar, top-of-the-line detectors, and I was using the one knob, very-easy-touse, low cost, friendly Compadre. When we displayed our finds to each other at the end of the hunt, the Compadre held its own. My best finds were a Mercury Dime at 6 inches, some Wheat Pennies and a pocketknife at 5 inches. It seems that the Compadre will find targets at a very respectable depth and do it with ease. Have you ever noticed that most of our coins, old and new, are found within the first six or seven inches? Let's Give It To Our Kid Experts For the next portion of the field


test, I am using two young experts (my grandsons)-Ethan Shuler, age 12 and Blaine Shuler, age 8. The test took place in the sand pit of a playground near a school where, over the past months, there has been a lot of activity. When we arrived, I went over the Discriminate Knob and the proper way to search. They were not anxious to hear that; they wanted to hunt. So, I turned them loose in the sandpit. The main thing I noticed was I could adjust the stem to fit each of them. We spent one and a half hours hunting when the sun started to suggest that we needed to get to a cool place. In that time, they found $1.79 of current coins, one key chain and a little trash. I set the Discriminate Knob to accept nickels so they would not be burdened with too much trash. Some coins were in the 5 and 6-inch range and gave strong signals. I was interested in their comments on the Compadre and so I asked. Here is what I learned: Blaine: "It's cool!" Ethan: "It's really light." Blaine: "It's neat!" Ethan: "It really fits me." Both of them: "Can I have one?" There you have it-the very highest compliments from our young experts.

Great Treasures

I just wanted to send you a note about the finds that I recovered within a 1 month period while only hunting in my spare time. I have hunted since 1982 with other brands and recently had to send one of them back for repairs. I bought a Silver µMax to use while the other detector was away. I WILL NEVER USE ANYTHING BUT A TESORO FROM NOW ON. All of these items, including a rare Virginia State Seal button, were found with the Silver µMax (and I have many more items that I didn't picture). I even applied for and was granted a Tesoro Dealership. Thanks for all you folks do!

Richard Whitmore Kenbridge, VA

(Richard Whitmore operates Whitmore's Good As New Shop in Kenbridge, VA. If you have any questions about Tesoro metal detectors, please contact him at (434) 676-2654 or at [email protected])

Final Thoughts

This is truly a "Family Fun Detector!" A family can take the Compadre on their outings and everyone can use it with high expectations of finding treasure. It is well made (must be with a lifetime warranty) and will fit the budget of any family. This is not a cheap toy; it is a quality, well-designed, lightweight, low cost metal detector. The Compadre would make an excellent first detector and, for the hard-core hobbyist, a backup detector that the rest of the family could enjoy. In every respect it measures up to the Amigo II and still retains that famous Tesoro discrimination. the words of our young experts, "Can I have one?"


I purchased my Lobo SuperTRAQ about 1 year ago. On the few occasions I have been able to hunt the California desert, I have found the following: 1) Meteorite (tested and confirmed). 2) 0.8 ounce silver nugget while searching for relics near a silver mining camp. (I'll go back this year to try and find the source of this nugget.) 3) 1925 Wheatie plus a 1920s cast iron toy car 2 feet down. 4) Mother of pearl cufflink circa 1850. 5) A snap that was ripped from a pair of pants. It has a date stamped on the face of 1843. 6) Bunches and bunches of square nails and lead bullets. The gold nugget still eludes me but I'll find it sooner or later. Thanks Tesoro for manufacturing a top rate machine. I just placed my order for a Treasure Mate today, and I'm looking forward to my next hunt.

Jim Morrison Rosemead, CA


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side of the faceplate, the number system is still intact and I think it should be left as is. When I am demonstrating a Tesoro detector, I always stress to my customers that they should look upon the numbers around the sensitivity knob as a speedometer in an automobile. The higher the number, the faster (deeper) the machine can go according to the existing ground conditions. On the sensitivity level there is a "boost" range marked in orange that can greatly enhance the

by Ron Barnes

Reprinted from MDI 18

Having had the opportunity in the past to field test several of Tesoro's prototype metal detectors, to say I was thrilled when I received a phone call from Heidi at the Tesoro factory would be an understatement. There was a choice given as to which of two machines I would prefer to "put to the test." When I was informed that the new Silver µMax would replace one of my two top sellers, I chose the Silver µMax. In my mind I just had to have a hands-on showdown with the detector that was supposed to replace the Cutlass II µMax. Since I had the notion in my mind that "nothing" could replace the Cutlass in its price range, I was stunned to hear that the retail price of the new Silver µMax would remain the same price as the old tried and true Cutlass. Upon arrival of the new machine, the first thing that I noticed was an improved shipping container. It was very securely packaged for shipping and reshipping. One thing to remember about Tesoro-if it can be made better, they will make it! As I removed the machine from its container, I immediately noticed the new faceplate design. It is a very simple but well-designed arrangement. There are two knobs and one toggle switch that control this little lightweight powerhouse. I really like the word system in place of numbers on the discriminate side of the faceplate. This will help the new detectorist as well as the "old timers." I cannot attempt to estimate the number of times I have been asked by a customer why "they" don't put the words there (i.e. iron, foil, etc.) and not just numbers. On the sensitivity


depth capability of this little dynamo. The one toggle switch has three settings. To the left is a Battery Check, the middle position is the Discriminate Mode, and the right position selects All Metal Mode. The Battery Check Mode is a nice improvement. In the past when doing a show or in my shop, I had to warn the customers of the loud battery check cycle that was normal for the Tesoro. Most times, I plugged earphones into the machine or put my handkerchief over the speaker to suppress the loudness. A nice improvement! After approximately 2 minutes (that's the length of time it took me to assemble the Silver µMax), I proceed-

ed out to my test garden which contains a variety of targets, ranging from a small 10ct gold ring to an Indian Head cent that have been buried in the test area for approximately 15 years. The soil in my test area has mostly a clay type of mixture. At the max sensitivity setting, I had some chirping but all the targets were clearly discernible. Now bear in mind, each target was buried 6 inches deep. I backed off on the sensitivity to about #8 and there was no chirping, only clear signals over every target especially in the All Metal Mode. Switching to Discriminate Mode, I found each target again but the small gold ring might have been missed if I had not known it was there. It gave a very weak barely repeatable signal, but the real story here is when I switched to All Metal, the ring gave a very solid signal. It was very obvious to me that this Silver µMax would find the gold in the All Metal Mode. Keep in mind that the ring was a solid 6" down!! The next day I was scheduled to do some detecting with a buddy of mine that still hunts with his old tried and true Silver Sabre II. I let him hold and swing the new Silver µMax, and he was astonished at its light weight. This particular field is well-known to local detectorists and has been "hunted out" for the past 15 years. The location is an old colonial village that was destroyed by the British in 1814 and saw some Civil War activity. We both proceeded to work a zigzag pattern but not a whole lot of targets were turned up. Part of the area had been roughly turned over by plowing and it was as hard as concrete. The total for approximately six hours of hard detecting was a dozen or so modern brass pistol cartridges, four or five brass shotgun


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shell heads, one-musket ball and several fired .22 caliber lead bullets. The next day I took the Silver µMax to a local salt water beach and spent several hours scooping modern coinage from impressive depths in the dry sand. I did note that upon entering the wet salt beach area, I had to back the sensitivity down to about #4 before it became completely quiet again. Even at that power setting, I dug several badly corroded coins from 5" to 8" in depth. A couple of days later another friend asked if I wanted to hit "the field" again as he had a couple of hours free. We met at the village site and proceeded to work our various patterns. This time I decided to hunt in the All Metal Mode and use the Discriminate Mode to weed out the trash. What a shocker! In virtually the same area as previously detected, I located the marked bowl part of a very ornate tablespoon, Long view of an old brass shoe buckle and several nice colonial dime-sized buttons. The real kicker was when I hit one target and switched to discriminate to see if it was junk, it disappeared. But flipping back to All Metal Mode it was repeatable. Meanwhile my friend had ambled over to see what I was spending so much time over (he hunts with a "Top of the Line" competitor's machine). He checked the target and got nothing. I disconnected the headphones and let him hear the signal. He advised, "must be junk." Well, you know we all have that little voice that sometimes we listen to, so I proceeded to enlarge and deepen the hole. I felt I was digging myself into it, as my friend was intently observing my struggle to go deeper in the concretelike earth. After numerous silent prayers and approximately 10" down, what should come to the surface for the first time in almost 200 years but the remains of an old pewter button


with eyelet still attached. The fertilizers had done their damage over the centuries and all that remained was the center of the button, that being less than the size of a dime. My buddy's comment, "Man, I would not want to dig that deep anyway." Yeah sure, uhhuh. To summarize my findings, I am astonished at the depth this low cost, high quality Tesoro Silver µMax can achieve especially in the All Metal Mode. Farewell Cutlass, welcome home Silver µMax! P.S. At the time I was writing this field test report, I was without a Silver µMax. I had a customer enter my shop the very afternoon I finished up the field work on the Silver µMax.

Great Treasures

I am writing a testimony to your Vaquero metal detector. Enclosed, you will find pictures of a confederate cavalry camp that has been "hunted to death". Thanks to my trusty Vaquero, it was a "near death experience". The campsite was located about halfway between Murfreesboro (Former site of the Battle of Stones River) and Chattanooga, TN. Upon repelling the Confederacy at Murfreesboro, they winter camped here in Wartrace. There were several skirmishes between Union and Confederate cavalry. Artifacts that I found were many varieties of mini balls (bullets), a knap sack hook, a yankee infantry eagle button, and my first percussion cap. Just wanted to thank you for such a fine detector. "If It's There, A Tesoro Will Find It." Thanks again.

Silver Umax

This particular customer had been trying to make a decision on which Tesoro he was going to purchase from me for the past 18 months. Would you believe he settled on the Cutlass II µMax! When I gave him the bad news about it no longer being produced, he became silent instantly. I advised him of the Silver µMax replacing it and offered to demonstrate it out in my test garden. He remembered from previous visits that the Cutlass had problems with the small gold ring. When he walked over the same targets including the small gold ring and got a clear sharp signal you should have seen the look in his eyes! From that moment he never took his hands off of my "only" Silver µMax in stock. He insisted I let him have this one as his wife had given him the checkbook and said, "Go buy your detector." Adios, Silver µMax!


Joel M. Luscinski Watrace, TN

Did you need a side by side comparison of each of our current models ? There is a Comparison Chart on page 55


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by Ron Barnes

Reprint from MDI 21

I would like to begin this article with a sincere "Thank You" to James Gifford of Tesoro Electronics for selecting me to perform this field test on one of Tesoro's new-style metal detectors. My first reaction, after the almost too-easy assembly of the Cibola, was "Wow." Finally, the ultimate competition hunting machine! The Cibola incorporates at least one function from several of my favorite Tesoro machines: push button pinpoint, selectable multi-frequency, adjustable threshold with a discrimination and sensitivity knoball at fingertip control. I was amazed at the fact that this dynamic detector was powered by 1-9 volt alkaline battery, and as always, I was very impressed with the compact but very secure shipping carton utilized by Tesoro. Folks, let me tell you that any similarity to past Tesoro models ends when the Cibola is turned on. The Cibola tugs at its leash like a welltrained hunting dog waiting to be let loose and go hunting! Treasure hunting that is! The Cibola will be at the top of the list of competition machines for sure, but that is just one segment of our hobby in which this detector will excel. The target separation ability and seemingly instantaneous recovery time will put the Cibola at the head of its class while hunting those trash-laden sites. My first stop after assembling the detector was my workbench to perform some air tests on depth and discrimination. My test bench has a yardstick attached and to test for maximum capacity, I started at the 24" mark.


Folks, you have to see the Cibola ("see bola") to believe it. It was but a couple of marks away from the starting point when the beeps began!!! I checked and rechecked and it was true. Incredible! Now, you have to understand that I was at max sensitivity into the boost range with low discrimination and the threshold almost maxed out. At this setting, you are going to have some errant chirps and beeps, but the ability

to go deep is there. Knowing that most folks don't like the occasional chirps or beeps, I backed off on the sensitivity and threshold boost until the Cibola smoothed out and stopped the chatter. Even with the controls backed off, the Cibola again started giving clear, repeatable target sounds just above the previously achieved mark. From the bench test, it became clear that the average competition hunter has never had the power potential of this detector. In fact, most competition hunters would be well advised to start at a power/sensitivity setting of 2 or 3. With that setting, you can discriminate out most junk targets with no

noticeable loss of depth, go for the tokens and coins, and not be concerned over most trash signals. My next step in the process was to proceed to several sites that yielded "keepers" in the past. My first site was one at which I had dug some nice colonial coppers and large cents along with various colonial buttons and buckles. Upon arrival, I powered up and discriminated down as I had hit this field numerous times and knew that trash targets should be minimal. As a matter of fact, I had performed another field test on an I.D. type detector at this very site and had recovered several half dimes at very, very good depths for this type of detector. As I worked methodically across the field, I turned up several lead fragments, averaging the size of a .22 caliber short bullet, deep in the loam-type soil. I had a feeling that deeper discoveries awaited me and thought that if there was anything left out here, it would entail some extra work-deep digging. In a few moments that feeling turned into reality. The Cibola tugged at the leash and brought me to its quarry! A nice smooth soft signal. Instinct told me that it was a button or coin. I proceeded to take a plug from the target area but no target. I checked the hole, and it was still down there. As I was at the 7" or 8" mark, I started enlarging the sides of the hole assuming I had erred in pinpointing. Wrong! After cleaning all the loose soil out of the hole, I rechecked, and it was still down there. Dead center! At that point, I placed my equipment belt on the ground and walked back to my vehicle to retrieve my Lesche shovel with the D grip-type handle. Back at the target site, I proceeded to take some serious amounts of hard-packed soil out of the hole as I


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was now below the level where the plows break up the soil each year. After several shovels full of dirt, I scanned the growing pile, and whamo, it was finally above ground. As I brushed the first layer of dirt aside, I saw something slide off to the side and plunk back down in the hole, but it couldn't hide anymore. I picked it up and carefully wiped the dirt off and lo and behold-a 1788 Spanish silver coin the size of our modern dime. It was an awesome feeling to hold an object that had not seen the light of day in over two centuries. The coin was in excellent condition and was placed in a separate holder in my pouch. After checking the hole, refilling it, and tamping the soil down, I started my pattern again with renewed energy. As before, the Cibola seemed to keep tugging at me to go faster. On the return path, I was within 10 feet of the area from where the Spanish silver came out of the ground when the Cibola whispered that familiar smooth silver sound. Needless to say, I went right for the shovel. Forget the trowel. No point in fooling myself. Again, same as before, got down beyond the earth that was broken up, and after sev-

eral shovels full of soil, I could see it in the loose dirt. It was the same size as the first one and would you believe, dated 1788. However, this one was well worn. I was elated to say the least, but at the same time couldn't help but think that I, as well as other seasoned hunters, had walked over this Spanish silver numerous times. After completing that leg of my pattern, I reversed direction and continued my sweeps. As I approached the area of the two previous recoveries, I was almost startled by yet another smooth signal. No question. Dig it! As before, the Cibola's quarry was in the pile of dirt-a nice cast colonial onepiece button. As I stood back and looked over the area of the 3 targets, they formed an almost perfect triangle. It would have been virtually impossible not to have walked over the area numerous times. (Folks, at this point, I have to tell you that this new breed of treasure hunter from Tesoro is not for anyone who is afraid of a shovel! Matter of fact, perhaps, Tesoro should consider adding a shovel to their line of accessories!) At several other sites, including a beach where numerous modern

clad coins were recovered from impressive depths, the power potential of the Cibola really came into play. I took the Cibola to another colonial site that had an existing church dating from the early 1700's. In the fields surrounding this old church, I got that familiar smooth "silver silver" sound. After retrieval of the object, I was pleasantly surprised with a sterling silver crucifix, quite old by its design and markings. Both silver producing sites have been in constant use since the early 1600's-one having been a major shipping port that was destroyed and its church desecrated by the British during the War of 1812. Now, the port area is basically a marsh due to siltation during the last two centuries, but the small surrounding fields now and then give us a glimpse of its past consisting mainly of bits and pieces of brick, glass, and pottery. It seems as if each new generation of Tesoro is enabling others and me to enlarge and deepen the window to the past. Well, enough of this; my new hunting partner "See bola" wants to peek through that window again. Happy Hunting! MDI

Ron Barnes (right) is an authorized dealer operating Bay Country Metal Detectors. If you have questions about the Cibola or any other Tesoro model, please feel free to contact him at 24799 Horseshoe Road, Clements, MD 20624; 301-769-4352; [email protected] On. the left are cast colonial one-piece button, 2-1788 Spanish coins, and sterling silver crucifix. All were found by Ron Barnes and his Cibola !


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Tesoro Electronics has excited the metal detectby Ben Myers ing community once again, Reprinted with permission from Western & Eastern Treasures, May 2006.) this time with their Vaquero metal detector. As you probing the Vaquero is as easy as ABC. This ably know, the Vaquero has been receiv3¾ turn potentiometer provides precise ing high praise for excellent depth and adjustments. Regardless of the mode smooth operation. Furthermore, the 3¾ used - Silent Search Discriminate or turn ground balance is making the difThreshold-based All Metal - the detecference in handling difficult soils. Add tor needs to be properly ground balthese attributes of top performance to an anced to the area being hunted. The extremely lightweight package, and it manual GB control makes the detector spells success. The Gifford family's better able to hunt with peak performcontinual improvement of the product is a built-in detector stand. At the other ance and depth, even in difficult ground, line and personal service has built a rock- end is a 9 x 8" monolithic (carbon fiber), solid Tesoro customer base. A company concentric type searchcoil, built to meet by balancing out the effects of mineralization in the soil. On each end of the conthat has flourished for a quarter-century most needs of the metal detectorist. trol's range, there is a slight drag to the while providing lifetime warranties Additional searchcoils are available knob. At this point, turn the knob in the undoubtedly takes its customer's needs for various applications. Tesoro offers a opposite direction two full turns for a censeriously. 5.75" concentric to allow closer searching tral position to l position to begin the proVaquero is pronounced vah-kero, near metal fences and playground equipwith the a being short as in ah. Vaquero is ment, plus improved target separation in cedure. For those new to ground balancing, Spanish for "cowboy," an apt comparison trashy areas. Larger coils provide more to a detector that is tough and hard work- depth and ground coverage. The 12 x10" this explanation takes much longer to ing. Tesoro itself means "treasure" in is a widescan coil that better handles write than to demonstrate in person. To Spanish, and as the name of a company of ground mineralization. The Vaquero uses begin, turn the detector ON by moving the great Southwest, it is a tip of the hat to HOT (High Output Technology) circuitry the Sensitivity knob out of OFF, to about the early Spaniards, who surely knew how and therefore shares these coils with the #9 or #10. Threshold (see next section) should be at the barely audible point to to find treasure. Having field tested many hear slight changes. Place the toggle Tesoro products in the past I was confiswitch to the frequency you will be dent that this detector would prove to be a using. With the DISC knob set to All capable hunter as well. Metal, sweep the soil and find an area free of metal. Hold the coil Design & Controls approximately 10" above and paralWith a total weight of only 2.2. lbs., lel to the ground (not tilted), then and three-piece, S-handled pole assembly, lower it to about an inch about the the backpacking and fatigue-free hunting soil. As the coil approaches the possibilities are obvious. Twist-lock colground, the audio threshold will do lars and spring buttons provide wobbleone of three things - stay the same free swings. The Vaquero is a MicroMAX (desired position), get louder and design with all controls on the housing higher in pitch, or disappear. If it gets face, easily within finger reach from the louder, turn the Ground Balance padded handgrip. It features a "Big Red" counterclockwise (left) a partial turn pushbutton for Pinpointing, Frequency Lobo SuperTRAQ, Tejón, and Cibola before trying it again. If it then goes quiet, toggle, and four rotary knobs to adjust models. spin the knob right (clockwise) just a bit. Ground Balance, Threshold, Sensitivity, Ground Balance (rotary knob) - If it stays the same, slap yourself on the and Discrimination. The control box also "GB" back because you have done it! holds an external speaker, a ¼" stereo This is a control which unnecessarily Picture yourself in the following sceheadphone jack, and a slide door for the baffles many people. Notice I said nario to make it clear. As the coil lowers single 9V battery. Beneath the elbow-rest "unnecessarily," because ground balancto the ground, you hear the threshold tone




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get louder and rise in pitch. Therefore, you raise the coil up, turn the GB knob a quarter-turn to the left, and repeat the coil-to-the-ground procedure. This time the audio goes silent. OK, you know you went too far, and now you turn the knob back to the right only an eighth of a turn. The next air-to-ground try leaves the threshold audio unchanged and therefore properly ground balanced. Although some detectors are more difficult than others to ground balance, this one is relatively easy, and with just a little practice you will soon be doing it like a pro. Threshold (rotary knob) - This control sets the background hum to your hearing so that slight changes in audio are heard. Too low or high, and small changes may not be noticed...and therefore a target may be missed. The best place to set the Threshold is at a barely heard audio (slight, steady tone). The Threshold can be heard in the All Metal mode by turning the Discriminate knob to All Metal or pressing and holding the red Pinpoint button. In Discriminate Mode, simply press and hold the Pinpoint button while turning the Threshold knob until a slight hum is heard. It's that easy! Although the background audio is not heard in the Silent Search Motion Discriminate Mode, it definitely affects it. This is especially evident when the detector is "Super Tuned." One improvement I would like to see is a tighter Threshold knob. In the heart of the hunt, it is possible for the control to be accidentally knocked, and that can mean a loss of depth. Granted, it is not something that happens often; nevertheless, it is a good idea to eyeball the position of the knob on occasion. One can accomplish Super Tuning by turning the Threshold to very high levels while in the Motion Discriminate mode. Pass a good target under the coil to find the most effective setting. The Threshold in the All Metal mode will be too loud at this point to be of any use. Accurate pinpointing is lost until the control returns to the original position. Rather than hear the


lessening volume of a deep or smaller target, Super Tuning assigns the signal of the deeper or tiny target the same loud audio response as that of a shallow target. While the Vaquero gets good depth without the use of Super Tuning, there are those times, such as on a beach or open field, when depth counts more than pinpointing. Fortunately, the detector allows the user to make the choice. Remember to ground balance the detector at the slight background hum before raising the Threshold to Super Tune. Then remember to return the Threshold to normal in order to use the Pinpoint. Sensitivity (rotary knob) - New detectorists discover that more sensitivity means more depth, and that is where they often go wrong. They have not yet learned that ground mineralization or outside electrical interference can dictate how much of that sensitivity is usable for peak performance. Changing the Sensitivity control adjusts the power to the operational amplifiers, thereby changing the gain (measurement of signal amplification) for depth and sensitivity to small targets. The old rule of thumb is to turn the sensitivity as high as possible without the detector becoming erratic (chirping, false signals). This will provide the best performance for depth and sensitivity to small targets. The Sensitivity control is marked with numbers 1 to 10, plus a Max Boost area in orange. As the control moves clockwise, it turns the detector ON, causing a series of beeps to indicate battery life (six or seven beeps, down to one or two when it is time for replacement.) If you suspect a low battery, recheck it about 15 minutes into the hunt by turning the detector OFF and ON again. Discriminate Level (rotary knob) "DISC" - Tesoro is famous for its discrimination circuits, with the Vaquero utilizing the ED 180 to better filter treasure from trash. The Discriminate control starts in the Threshold-based All Metal Mode. With the ED 180, relic, beach, and

other hunters have the choice of using the All Metal or Discriminate Mode. I prefer using Motion Discriminate with the level at the bottom. But others may prefer the clicked-in All Metal Mode. Be aware that the autotune acts rather quickly to reduce the target size for pinpointing. As the knob is turned clockwise, it clicks out of All Metal into the Silent Search Motion Discriminate Mode to eliminate unwanted targets. For newcomers, the following explanation may help. Picture the coil moving across the ground while a small electronic field generates beneath it to detect metal targets in the soil. Of course, this field cannot actually be seen. The detector sends and receives signals to create the field, and the amount of change created by a target determines its identity according to its ability to conduct electricity. The identities of many targets - for example, U.S. coins - are constant and easily ID'd. Even most types of pulltabs fall within a general conductivity range. Because of this, metal detectors are able to eliminate audio responses from unwanted targets. Around the DISC knob, several targets and lines indicate the point at which their signal will disappear (be discriminated) from the audio. The levels begin with iron through foil, nickels, pulltabs, screwcaps and other targets. It is a good idea to do some common target testing to see the effect that various levels of discrimination have on their audio signal. As with any metal detector, increasing the discrimination level can result in the loss of good targets along with the bad. For instance, gold jewelry can appear throughout the conductivity range, depending mostly upon size and alloys used. A larger gold ring will continue beeping into the silver coin range without being eliminated. However, a thin ring with a diamond may read down in the nickel range or lower. A certain type of large gold wedding band may even read in the pulltab range. Set that discrimina-


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tion too high and you will miss those out of range. In a normal hunt, most targood targets. The general rule of thumb is gets are plucked up in the first 15 minto keep discrimination as low as possible, utes. An interfering detector at that time except in extremely trashy areas. will cook your goose! Targets are still Rather than maintain a high level of found later, of course, but not nearly as discrimination, many detectorists prefer many. If you are using the Vaquero in that to "thumb the DISC knob" and use their same scenario, a quick flip of the toggle ears to determine target identity. If you shifts it to an operating frequency differare not familiar with that method, it is ent from that of the offending detector. quite easy and predicts the identity of a Rapidly recovering smooth operation target with high precision. There are legions of detectorists who prefer this method audio discrimination to visual discrimination with a meter. Vaquero Long View As an example, suppose that while hunting with the DISC set to avoid tinfoil, you encounter a beep. Making sure could make all the difference for a sucthat the center of the coil is passing over cessful hunt. You can even flip the toggle the target, you slowly sweep the coil back in the middle of swinging the coil, and and forth while making small changes to never miss a beat. Pinpoint ("Big Red" Pushbutton) - I the DISC knob. As you bring the thumb call Tesoro's pinpoint button "Big Red" up to push the knob just past the nickel mark, the signal disappears. That is a for a reason. Big Red fairly screams out good indication that the target is a nickel from its obvious location, "Hey, you can't or perhaps a gold ring. If the detector con- ignore me! Use me to avoid sloppy digtinued beeping until the pulltab mark, ging or damaging a nice coin." Big Red then disappeared, it is probably a pulltab. does not accept ignorance as an excuse Depending upon how much trash is in the for butchering a park lawn, thus adding area, you might want to investigate such a another location to the detecting "Off signal anyway, in the hope that it is a Limits" list. The Vaquero makes pinpointmedium sized gold ring. As you can see, ing a snap, yet many times the when used properly this control can raise Discriminate Mode signal is so sharp that pinpointing is not necessary. Do not foryour success level substantially. Frequency (toggle) - This is a three- get, though, that where neatness counts, position switch, used to toggle the operat- pinpointing is a must. Once a target has ing frequency between 14.3, 14.5, and been detected, just push and hold down 14.7 kHz. While this feature may be Big Red as the center of the coil comes handy to avoid radio tower or other inter- over the center of the target. Move the ference, its main use comes at competi- coil very slowly to find the location tion hunts. Additionally, it permits two where the volume is loudest. The detector friends to hunt near each other while will shrink the target size, but raising the using the same model detector. coil a bit will also help narrow down the Experienced competition hunters know spot under the center of the coil. the disaster caused by interference from other detectors. It can render a machine In The Field Since the Vaquero has three changepractically useless until the offending detector is identified and one can move able operating frequencies, the first place I decided to take it was a competition


hunt. In fact, two competition hunts were visited during this field test. Any success that I enjoyed in the hunts can be strictly attributed to the Vaquero, as there was a limiting factor in both. A couple of weeks prior to the first hunt, I had severely injured the muscle in my upper thigh, necessitating a trip to the emergency room. (Of course, it couldn't have happened after the fall hunt of the Lancaster Research & Recovery Club.) I knew it would not be possible to kneel and jump up quickly after each target but did not want to miss the fun. Therefore, I tied a bandana around my thigh to give it support and figured I would have to take it slower. The Vaquero took over like a champion! This was one of those occasions when the human holding the detector was actually slowing down the machine. I thought of letting the Vaquero hunt on its own, but would likely been disqualifiedsort of like the horse throwing the jockey and finishing the race alone. There were some junk targets on the field. However, the planted targets were pennies and higher silver, so Discriminate was set to eliminate the trash. That saved a lot of digging and my leg. Many targets did not require Pinpointing with the nice narrow beep of the Discriminate mode. When Pinpointing was needed, the Big Red button made it quick and precise. Interference came from only one other detector. It was nice to flip that toggle in the middle of the sweep without stoppingend of problem. Since most targets were no more than 4" deep, I kept the Sensitivity low, which also helped to avoid interference. The second hunt was a two-day open event held by LRRC. I could not be there for both days, so once again I was limited with just a one-day hunt. Nevertheless, the Vaquero came through with nice finds and prizes. This hunt exposed the


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Vaquero to the interference of even more detectors, but again only one caused any trouble. Quickly flipping the frequency toggle did not slow me down at all. Three trips to ocean beaches proved that the Vaquero could handle the wet salt sand. Two of the trips were to southern New Jersey beaches, and one to a southern California beach while on vacation. I did not come across any black sand, but the Vaquero ran deeply and smoothly to find coins and jewelry in the surf. There were no block-buster jewelry finds; however, the jewelry that did turn up proved that it was only a matter of the coil going over the right spot. Although it is difficult to estimate depth when scooping sand, it was close enough to demonstrate excellent depth. My usual setup for the beach was ground balancing on dry sand, Discrimination as low and Sensitivity as high as possible, with Threshold moved to Super Tune. The result? A large pile of modern coins was garnered one at a time, some as deep as 12" or more. Super Tuning at the beach provided outstanding depth ability and sensitivity to smaller targets such as two tiny 14K gold charms and BB sized lead pieces. A man's plain gold wedding band had to be a good 12" deep. Silver also turned up in the form of a sterling religious medal, sterling "#1 Mom" charm, and several silver toe rings. An important discovery on the long beach walks was the lack of arm fatigue, due to the lightweight, ergonomic design of the Vaquero. Changing the detector to the other hand was rarely necessary. Nearer to home, I was hunting a modern school playground where sports are also played. Modern coins were plentiful at up to about 5". Two deeper targets at about 7" turned out to be a pair of Mercury dimes. Obviously, this modern school field had seen earlier use, but I had no idea how much earlier until a solid signal at 10" turned out to be a round musketball. I've made this kind of serendipitous find before, and it is always a thrill. I'm no arms expert but easily pictured a


musket-armed hunter in coonskin cap, passing this way when the landscape was a game-filled woods. The lesson here is not to judge a piece of land by its current purpose. One day a neighbor knocked on my door and asked if I could use my detector to find a gold chain lost by her son. Naturally, I said I would try. We went to his friend's house, where they had been wrestling on the back lawn. Imagine my amusement when we pulled into the driveway of a mid-1800s house. Making friends with the homeowner, I was given permission to keep anything found while looking for the chain. To make a long story short, the chain never did reveal itself. I had thought it would be easy to spot it right on the surface, but the boy later admitted that he might have lost it while walking home. In only an hour, the Vaquero located a Seated Liberty quarter at 6" and a large cent at 8". Some areas had a fair amount of small iron nails; however, raising the discrimination just past iron eliminated most of those signals. I would love to get back there for a more thorough search with slow sweeps. Perhaps minimum Disc or All Metal would turn up more coins among the iron. My tests also included trips to several parks. In all areas, the detector ran quietly when discriminating out small iron, while larger iron gave a broken signal or disappeared as the discrimination was raised. Pinpointing was precise, which meant neat, easy digging. Several Wheat cents and silver dimes produced good repeatable signals at 8", or more. The Vaquero was revealing itself to be an excellent coin hunter with quick and easy ground balancing. With the larger coil, some target separation difficulty can appear in super-trashy areas, and I found myself wishing for the 5.75" searchcoil at these locations, as I understand it gets excellent depth while zipping around the junk. However, lowering the Sensitivity and raising the larger coil a little did the trick. When hunting around

playground equipment and fences, reducing the Sensitivity allowed the coil to get closer. The most difficulty encountered in one park was finding an area free of junk metal in order to ground balance. The opposite effect of the 9x8" coil is that it has a very good matrix area, which can extend up to 3" beyond its edge. This means extra coverage, in addition to the deep field beneath the coil, and that gives one confidence of not missing targets when covering ground in a field, park, or on the beach. Occasionally, I heard a signal that was not quite good, yet nearly. I discovered, when sweeping the area, that such signals often resulted from the outer edge of the coil signal just catching a coin. Running the central area of the coil back over the spot produced repeatable, solid beeps and a good target. Don't walk past this type of signal...check it out! The 9x8" coil will bring in extra finds for the detectorist who listens and is not in a hurry. Summary Having used a number of similar looking Tesoro models, I was not certain whether there would be any differences with this detector - there were. The ED 180 Discrimination circuit provides excellent discrimination throughout its range and runs quietly over eliminated small iron. In the areas hunted, the sensitivity ran at very high levels without chirping. Ground balancing is easily managed, even for new detectorists. These attributes and others made themselves more apparent with every trip. The Vaquero is extremely lightweight, goes deep for treasure, provides solid signal responses, and comes with a lifetime warranty. It is not fully possible to appreciate the abilities of this metal detector on the first or second trip; it builds over time. With each hunt I developed even more respect for Tesoro's Vaquero, and I have no hesitation in recommending it for your consideration.



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Lord of the Rings

All stories are by Ken Dewerson Ring Returned On a sunny spring day in ring with 15-one carat diamonds that Ron Salmon Arm, British Columbia, Mike valued at $15,000. Kelly was now so and Kelly Wilson were taking a stroll excited that she gave both myself and along the walkway next to the lake. As Bob a big hug. Ron was surprised that they stopped and leaned on the rail to the ring was 8 feet away from where he take in the scenery, Kelly was twisting expected it to be. the ring on her finger when it slipped and Ron was more than happy to pay fell 10 feet into the rocks and long grass our fuel costs for the journey and also below the walkway. gave us a large cash reward including the "No problem," said Mike. "I saw detector that he had bought. it bounced and where it landed. We will The moral of the story and the walk down and pick it up." A few hours secret to our success is knowing the prelater after a visual search, they still could cise location of the loss and using a repnot locate the ring. utable brand of detector. The next day Mike went to the . local store and purchased a metal detecLost Wedding Band tor to assist them with the search. After 4 Comes home days of searching with no success, they I received an email from Joe thought that maybe somebody had spotabout a lost wedding band. Joe had ted it and had picked it up. They considchecked around at dive shops for assisered making a claim on their household tance but no one could help him. As insurance although Kelly still preferred President of the Kelowna Metal to locate her missing ring. Detecting Club, Joe contacted me for Two weeks later, Mike looked help. I responded to Joe and met him at up metal detectors on the Internet, thinkhis campsite on the lake, and he showed ing someone more proficient in their use me approximately where the ring was may be able to help them. lost. I told him I would return the next He eventually phoned me in morning with my detecting gear and Kelowna, a 2 hours drive away.He asked attempt to find the ring. if I would be willing to assist him. I told Tuesday morning at 7 a.m., I him that my hunting partner, Bob entered the water with my Tiger Shark Shabatura, and I would be only too and started to grid the area. It soon happy to help for just the cost of the fuel became apparent that the soft muddy area from our home to Salmon Arm. was heavily littered with metal garbage. We arrived at the location on After 4 hours of searching and digging Monday morning with my Tejón and my out nails, rusted cans, bottle caps, 8 coins partner's Cibola. Kelly showed us where and a mood ring, I still had not located she was standing on the walkway and the wedding ring. At this point I had where her husband saw the ring land gridded the area from 2 directions and after the bounce. We proceeded to search had removed a large amount of junk. I the area and removed various pieces of was still getting good signals on my foil and bottle caps. 5 minutes later I got Tiger Shark, so I decided to return with a signal from my Tejón around some Joe for specific directions on his actions roots in the long grass. Unable to see the that caused the loss. target, I probed around with my pinpointOn Friday afternoon, I entered er and still had a good signal under the the water again to continue the search. roots. Feeling around with my finger, I After 2 hours of sifting through the junk felt the shank of the ring. I said that I metal, a solid signal brought the white thought I had found something, much to gold ring surrounded by 24 diamonds to Kelly's excitement. the surface. I was out in the water yahooI removed the ring and was ing but Joe was fast asleep on the beach. shocked to see a 14 karat yellow gold


I went ashore and woke him up with the good news. On the way home, Joe stopped in the local store and as he entered, the background music being played was his wedding music. It brought Joe to tears. Platinum Band Returned Le Ann was having a barbeque party in her backyard. Among the guests was her brother, who was playing throwfootball with the kids. After the game and having drinks on the patio, he realized that he had lost his platinum wedding band during the game. Panic stricken, they all searched the yard in their bare feet to no avail. After two days, Le Ann contacted me requesting assistance in searching for the ring. She was a little concerned about the cost of the search. I assured her that there was no cost. I told her that my hunting partner, Bob Shabatura, and I would meet her first thing the next morning. She was not to cut the grass. After introductions, we set about the search. Bob was using his Vaquero with the stock coil, and I was using a Silver Sabre with a Clean Sweep coil. Bob started by searching the perimeter of the yard, and I began gridding the main area in front of the patio. After approximately 30 minutes we had located over $3 in coins, which we gave to the lady's daughter. We had not found the ring. I moved to the side of the patio, got a signal in the long grass, and located a ring with a sentimental engraving on the inside. The little girl ran inside to get her mother and it was hugs all-around. She insisted, we accepted a small reward that was appreciated for our efforts although the big reward was the happiness we gave by returning the ring.


Ken Dewerson is an authorized Tesoro dealer and operates K & B Enterprises located in Westbank, BC Canada. If you have any questions about Tesoro metal detectors, you may reach him at (250) 707-0618 or email him at [email protected]


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FIELD TEST by Ben Meyers

(Reprinted with permission from Western & Eastern Treasures, March 2000)

Tired of those pesky false signals that your VLF machine makes over wet salt and black sand? Pulse induction (PI) could be the answer and Tesoro's exciting new PI model is called the Sand Shark. The folks at Tesoro have chalked up many impressive achievements in recent years. Their development of ultralight, high performance land detectors has drawn praise from many detectorists. Now, with the release of this machine, they can also boast that, "The Sand Shark is the first Pulse Induction metal detector that is controlled by microprocessor technology." Let's take a closer look at what that means for you. In the past, one chore the PI searcher had to perform fairly frequently was tuning the detector to keep it at peak performance or risk missing targets. With Tesoro's The Sand Shark has four control knobs on the face use of microprocessor technology, that may look a little daunting at first, in fact they the detector now keeps itself in are easy toset and actually make pulse detecting tune, allowing one to concentrate more comfortable than ever. on listening for targets. Those experienced in the use of PI detectors depressing four of the spring buttons and know this is a real time saver and maybe lifting off the control box. It is obvious a gold ring saver as well. Peak perform- that a great deal of thought went into the ance can be the difference between suc- ergonomic design. cess and failure for any metal detector. SEARCHCOILS The Sand Shark has a standard Tesoro is forging ahead with modern 8" open-center searchcoil for most applitechnology to make pulse induction operating a user-friendly experience. cations, plus a 10½" open-center coil for Now, with microprocessors working for larger targets and light trash, a 7" for you, you just set the Sand Shark to your smaller targets ad trashier sites, and a 10" preferences, then hunt on the beach or elliptical for a widescan sweep while under water leaving the detector to han- retaining good sensitivity to smaller targets. Being stuck with a 10" coil in a dle circuit maintenance. trashy area where a small one would do nicely is no picnic. Having the extra PHYSICAL DESCRIPTION First of all, those of you who are depth of a larger coil in a non-trashy site divers won't have to make any do-it- is a blessing as well. Tesoro's exceptional Printed Spiral searchcoils provide the


yourself pole and armrest modifications. There are three sections of poles which easily fasten and unfasten with spring buttons and pole locks. This system provides for no wobble coil sweeping and easy disassembly. For diving, remove the middle pole section and slide the lower pole directly into the upper-the section with the S-handle and padded handgrip. Another nice convenience for either diving or beach hunting is the ability to place the control box on the pole, under the elbow at the armrest, or mount it to body or belt. The 8' of cable provided is sufficient for any configuration, and control box removal is just a matter of

best tools for the job at hand. Also, you will notice that the target signal is strongest at the center of the coil for easier pinpointing. CONTROL BOX The control box has a bracket mounted on the top. Holes on either side of the bracket allow the spring buttons to be pressed in and the control box lifted off the pole. It can also be mounted under the pole and in front of the handgrip for easier access to the controls. If you'd rather have the counterbalance of the control box under the elbow it's a "snap." The control box, as well as the entire detector, is ruggedly constructed to allow diving to a maximum of 200'. The Sand Shark comes with a set of attached, waterproof stereo piezo headphones. Two draw-bolt clamps retain the face of the control box for a watertight seal of the electronics. Eight AA batteries held in a drop-in battery pack power the detector. The batteries are accessed through the release of the faceplate clamps. CONTROLS & FEATURES PI units don't have to contend with ground balance and are usually simple to use. The Sand Shark has four control knobs on the face that may look a little daunting at first. In fact they are easy to set and actually make pulse detecting more comfortable than ever. The MODE control is the one we'll consider first. Mode is a word with a number of meanings in the detector world, and in this case, it is a way of adjusting the type of audio response of the unit. In the extreme left position, the unit is OFF. The next setting is VCO (Voltage Controlled Oscillator). The oscillator on the Sand Shark changes audio frequency and amplitude as the target nears the coil. So, the signal you hear through the headphones becomes


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louder in volume and higher in pitch. This is my favorite way to hunt with the Sand Shark, as there is no doubt that a target is nearby. Skipping to the last notch, you'll find the NORMAL setting. In this mode the audio signal keeps the same frequency you set and the volume of the audio signal indicates signal strength. Tesoro nicely considered each person's hearing and provided an ability to preset the frequency to be used in this mode. That is where the third slot of the MODE knob comes into play, marked "F SET" for Frequency Set. Place the MODE knob to "F SET," then look at the THRESHOLD knob directly across from it. It becomes a frequency adjuster to set the tone of the NORMAL mode. You will notice that "F SET" on the MODE knob and "F ADJUST" under the THRESHOLD knob are both highlighted in orange to work in conjunction. After adjusting the THRESHOLD knob with the corresponding "F SET" MODE knob you will hear the audio tone you desire. Remember that once frequency is set and you have come out of "F SET," the threshold must be reset. Also, while the MODE knob is a "F SET," the detector will not respond to targets. It must be in either VCO or NORMAL. While discussing the THRESHOLD knob, perhaps we should explain to new detectorists that "threshold" is the steady hum you hear in the background. Some targets are so small or deep that they may not be able to generate much of a change in the audio. Therefore a low, steady hum is the best setting of the threshold as too loud a threshold will not allow one to hear minor changes. Once the VOLUME control is set, you can do a battery test. The volume should be adjusted in accordance with conditions of the area to be hunted, and set at a point that is comfortable for you. The THRESHOLD knob has a slot marked "BATT. TEST" that checks the condition of the batteries. The eight AA batteries will provide 10-20 hours of use with the PULSE WIDTH knob set at the "preset" position. Six or seven beeps means that the batteries are A-OK with fewer beeps meaning that they are draining. Tesoro suggests replacing the batter38

ies at one or no beeps, but personally, I wouldn't wait that long. Output power is especially important in a PI machine, and you want all the performance available. Don't forget to reset the threshold when the battery test is finished. The PULSE WIDTH knob may be an unfamiliar one for some people. However, the Tesoro engineers have wisely included it to give you more control over battery life in relation to sensitivity. Some may disagree, but I feel comfortable in saying that you can think of the PULSE WIDTH as a kind of sensitivity control: the higher one turns it, presumably the more sensitivity and depth. The downside is that the higher one turns it, the more power is used and the less the battery life. The nice part is that you control it. Depending upon the search, you decide whether you need more battery life or more sensitivity to targets. That explains the controls which are straightforward in design and function. You decide and set for VCO with changes in pitch and loudness, or NORMAL mode with the same audio frequency. Be sure to check your battery condition and set the THRESHOLD and VOLUME levels, as well as the PULSE WIDTH. The detector takes care of the rest. The user doesn't have to keep retuning the machine because microprocessor circuitry performs that job automatically. UNDERSTANDING PULSE INDUCTION With so many new people getting into the hobby, I would be remiss if I did not say a few things about pulse induction in general. After all, a better understanding of it will help you get the most from the Sand Shark. PI machines are mostly an all-metal detector. True, there are some that provide discrimination (trash rejection) of higher conductive targets, but iron is often detected. PI's are ordinarily used on beaches and underwater, where trash is normally lighter and high discrimination should be avoided anyway. Gold jewelry can show up anywhere from "iron" on up to "silver dollar" on a conductivity scale, depending upon a number of factors. This is true for all detectors. You want to dig all tar-

gets on a beach, if you don't want to miss any jewelry. VLF machines have to cancel out the effects of ground minerals while sending out a constant electromagnetic field. When a metal target disturbs the field, the imbalance is reported to the operator via the circuitry. Most VLF machines have a real problem with wet salt sand, and especially black magnetic sand-conditions where PI machines excel. Manufacturers often say that PI units ignore salt and other mineralization. I don't know that it is so much that they ignore them totally, as that they ignore them long enough so that they don't pose a problem. Unlike a VLF machine, a PI detector has a single antenna that both transmits and receives. The batteries provide power for the pulse coil to "turn on" and transmit an electromagnetic field into the matrix around the coil. The matrix in the ground causes eddy currents on both mineralization and metal targets encountered. The transmitter antenna then deactivates itself and waits. After a specified time the circuits activate, and the antenna becomes the receiver for any residual eddy currents. The better an item conducts electricity, the longer it will hold the eddy currents, and therefore the more easily it can be picked up by the receiver antenna. Fortunately, mineralization does not conduct electricity well, and therefore the eddy currents decay quickly in the ground (gold and silver are good conductors and hold those eddy currents for the receiver antenna). OPERATION To follow up on the previous paragraph, the receiver antenna "activates" after the eddy currents in the mineralization decay, yet is still detectable in metal targets. Longer transmitting time allows more eddy currents on metal targets, and it is easier for the receiving antenna to pick up these residual eddy currents. This translates into more sensitivity and, as a result, greater depth. Increasing the PULSE WIDTH creates a longer transmitting time of the antenna but also causes more power use and therefore less battery life. The "Preset" mark on the Sand Shark's PULSE


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WIDTH control gives the best balance between sensitivity and battery life. All of this happens fast. In fact, the operating frequency of the Sand Shark is 600 pulses per second! Why so many? Well, for one thing, it allows the operator to use the Sand Shark more like a VLF machine, in that one can use a faster coil sweep. There are reportedly other reasons, but I can't comment on those within the scope of this report. The Sand Shark utilizes AutoTune in the microprocessor circuitry to keep itself tuned. For that reason, a very slight motion of the coil is required at all times to receive a signal. However, it is an extremely slight motion, and pinpointing is enhanced with the Spiral Printed coils, which make that aspect of operation so easy.

FIELD EXPERIENCES Although PI detectors can be used in fresh or salt water, they are really in their environment in a saltwater location. Many times a detectorist will be surprised to see a PI detector get better depth on a wet salt beach than in an air test. I suppose everyone has his own opinion, but mine is that this is due to the fact that salt water is a good conductor of electricity. After all, the machine is pulsing out electromagnetic sigLongview of nals and the farther they can be Sand Shark sent and received the better. About the time the Sand Shark arrived for testing, the east coast was being pounded with some noticed that there are fewer pulltabs at nasty hurricanes. Ordinarily that would the beach these days and more of those be great, but it's several hours' drive to little circular foil liners from drink botget to the beach from my home and at tles. I guess they are going to be the every opportunity to get time off from pulltabs of the next century. Finally as I was about to call it a work, another storm would hit and the beaches would be closed. Nevertheless I day, real gold came up in the scoop! The did get in two short trips to the seashore, water was about ankle deep, and the ring and one to a freshwater lake closer to was a wedding band-small, but 14K and thus a keeper, with no owner markings. home. On the first trip to the seashore It was about 5" deep and gave a good beach, I took a couple of minutes to set signal. The next trip to the seashore was up the Sand Shark and check the batteries. During the sweep up and down the about the same as the first, between beaches, I tried both the NORMAL storms but not the kind to churn up old mode and the VCO. I definitely pre- coins. This time there were more coins, ferred the VCO with the change in pitch; and some of them had been there a while so, after a while, I just left it on VCO. as they showed the signs of salt-water


My field test took place after the tourist season, so I should not have been surprised at the lack of signals on the dry sand, where armies of detectorists had scoured a depleting supply of coins and jewelry daily. Down at the water's edge, there were still a good number of targets. I suppose that the constant tide action kept making deposits in the "bank." My very first target came up in the scoop, flashing the color of gold! I was shocked. Unfortunately, closer inspection revealed that I'd found a gold-colored earring, not real gold. Even so, the experience did get me in the mood to find gold. The next couple of hours turned up a fair number of coins and a fishing sinker here and there. Most of the coins were from surface to about 8", and with the VCO the audio alerted me right away to the presence of metal. I found two or three small pieces of iron, but it was a clean beach except for the ever-present pulltabs. We all know that pulltabs can "look" exactly like a gold ring to a detector, so we tolerate the little rascals. I also

corrosion. I was not to find gold on this trip, but someone's house key "unlocked" the secret hiding place of a silver religious medal close by. I am grateful for the "gazillion" religious medals lost over the years, especially silver ones. Of course, the main reason for the trip was to use the detector, and the Sand Shark was definitely doing its job of finding treasure for me. The detector only weighs 4½ lbs. so fatigue was not a problem. I had the control box on the pole, and if I had thought of it, it would have felt even lighter if I had put it under the elbow. Due to work situations, I couldn't get the time for more trips to the seashore, so opted for a trip to a swimming lake in my area. This was well after the swimming season, and I didn't expect to find much, but the weather was cool and the sun was shining, and what more can you ask? As predicted, there wasn't much to find except a few coins and pulltabs. I was placing a tab in my trash pouch when an older couple, taking a walk, came up to see what I was doing. "Find anything?" they asked. How many times have we all heard that? "Nah, just some coins and pulltabs." They smiled and idly watched as I continued finding tabs. Then it happened. The signal was not a "banger," but definitely something interesting. It took two scoops at the water's edge to recover it. About 10" down was a nicesized 14K gold wedding band! There are no initials inside the band, so guess who gets to keep it! After I left the lake, I believe there was an open-mouthed older couple on their way to a detector shop to make a purchase. SUMMARY Regardless of the detector you use, get out there and enjoy it! But if you are in the market for a new water-hunting machine, by all means check out the Tesoro Sand Shark. Believe me, it's one shark that will put the bite on treasure!



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Lost Treasure Field Test

by Andy Sabisch

Reprinted with thanks from Lost Treasure December 2000

Jack Gifford founded Tesoro Electronics nearly 20 years ago and since then his company has developed the reputation of building high-quality, dependable metal detectors at affordable prices. Over the years, Tesoro-users worldwide have recovered coins, jewelry and artifacts spanning thousands of years, often in areas that had been heavily hunted with competing brands. Jack and his staff are continually working on developing new models to provide users with greater performance and flexibility in the field. With the popularity of beach and water hunting, they focused their efforts on producing a unit that builds on the success experienced by their Stingray II and Sand Shark models. Since I am an avid water hunter myself, I was anxious to see how well the new unit, the Tiger Shark, performed in some of the lakes and ocean beaches near my home. FEATURES When selecting a metal detector, beach and water hunters have been forced to make a choice based on where they planned to hunt most often; i.e., fresh or salt water. While VLF detectors offered discrimination, they were usually adversely affected by the conductivity of salt water resulting in erratic operation. On the other hand, pulse detectors could handle these conditions; however, they lacked the discrimination found on VLF units and as a result, users were forced to dig almost every target they


came across-good and bad! The only solution was to purchase two different detectors if you hunted both fresh and salt water sites or look into one of the $1,000 plus units operating on multiple frequencies. After two years of design and testing, the microprocessor-controlled Tiger Shark was born. In the NORMAL mode, the Tiger Shark utilizes the fieldproven ground balance circuitry found on other popular Tesoro models such as the Eldorado and Bandido. What sets the Tiger Shark apart from other VLF detectors is the SALT mode which acti-

Threshold and Sensitivity. The Tiger Shark uses the same control housing that has been used on all of the other water detectors that have been built by Tesoro. Rock-solid, this case has developed the reputation of being leak proof even after years of service and is rated waterproof to 200 feet. The shaft assembly allows for the detector to be used in several different configurations including pole-mounted, hip-mounted or as a short-handle dive unit. No additional parts or kits are required for these conversions. The Tiger Shark is powered by 8 AA batteries which, according to the manual, provide between 10 and 20 hours of life. I tend to think you will get more than this as I used the unit extensively during the field test and never had to replace the batteries. Rechargeable batteries can be used in the Tiger Shark with no adverse results. The battery pack has also been redesigned and is now a drop-in system that eliminates the potential of breaking the battery leads. FIELD TEST My initial testing was conducted at a few local land sties such as schools and private yards to get the hang of adjusting the Tiger Shark and seeing how it responded to various targets. Like other Tesoro models I have used in the past, the Tiger Shark did an above-average job in handling the mineralized ground found in central Pennsylvania and located targets including a few wheat cents, three silver dimes and other items at depths up to 9 inches deep. The first water site I visited was a small public lake in a nearby town. Unfortunately, the summer of 2000 in the Northeast has been one of rain and cool temperatures, which kept


vates a completely separate set of internal settings and circuitry which allows the adverse effects of salt water to be compensated for with no loss of performance. Tested in a number of different areas over the two-year period, the two modes-NORMAL and SALT-make the Tiger Shark a truly versatile detector unaffected by mineralized ground or salt water. The Tiger Shark is controlled through four knobs on the control housing face and three small potentiometers inside the housing. The external knobs are TUNE SPEED (All Metal Slow/Fast/Motion Discrimination); MODE (Off/Normal/Salt); DISC LEVEL and GROUND ADJUST. Internal adjustments include Volume,

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I switched to the SALT mode and the crowds small to non-existent on ground balanced the unit. Sweeping the most beaches throughout the season. coil across the wet sand, a few "popsHoping to find at least a few "keepers"and-chirps" were produced. The sensiwhether from this season or previous tivity was still set fairly high from the ones, I set the sensitivity near maxifreshwater sites I had been searching mum, ground balanced the unit and which was causing the background walked into the shallow roped-off noise. Turning my back to the wind, I swimming area. As expected, signals opened the control housing and lowered were few and far between. One thing the Sensitivity slightly. Closing the case that I noticed immediately was the lack and re-ground balancing the detector, I of any chatter or false signals as I found it to be silent as I swept across searched. This beach was in the center the wet sand. Even as I approached the of the coal mining area of Pennsylvania area where waves were washing up, and when I had hunted here in the past I there was no falsing typically experihad been plagued with "noise" from the enced when hunting saltwater areas with coal cinders that were buried in with the most VLF-type detectors. Brian and I sand. The new circuitry was doing an planned to crosscheck each other's sigexcellent job ignoring the "hot rocks." The first signal was quite Long view of Tiger loud and turned out to be a Shark with head phones new Maryland quarter just under the surface. Continuing out towards the rope, I received a faint but repeatable signal. Digging down to the clay layer under the sand, I found a nals to see how the Tiger Shark comsmall 10KT gold hoop earring-not pared to his pulse detector. He hit the worth much but I'll take any gold target! first few signals; however, the Tiger The impressive thing was that the Tiger Shark did not produce any response Shark had detected a target this small when I checked them. In each case the almost 7 inches down in sand that contargets were ferrous trash-sparklers from tained hot rocks. Over the next three the 4th of July, wire ties, small pieces of weeks I hunted four more freshwater a rusted can, etc. The first signal I beaches and despite the cool weather received was clear but faint. Brian and competition from local hunters, I checked it and also received a faint sigrecovered nearly $25 in coins, several nal. From just over 8 inches we pulled keys, a nice dive watch (still running) out a well-corroded quarter slightly on and 11 pieces of gold including a rope edge. Over the next hour we found sevchain that most detectors would have a eral coins, a key, two Matchbox cars hard time seeing even when placed on and a few other non-ferrous items. the coil itself. Brian had also recovered more than two Since moving up to Pennsylvania from Georgia, I was closer dozen pieces of rusted metal which is the downside of using a pulse detector. to ocean beaches than I had been in the As we started working our way back to past which was convenient for testing the boardwalk, I received a signal and detectors in this environment. I called called Brian over. He was not able to an old friend of mine-Brian Wilkin-who get a signal despite hearing the response lived on the New Jersey shore and from the Tiger Shark. arranged to meet him on the beach near Curious as to what the target Toms River, N.J. He is an avid saltwater was, we carefully scraped the wet sand beach hunter and was anxious to see away. Four inches down we found a how well the Tiger Shark performed in small (0.5" x 0.25") thin gold cross. It his area. We started out in the wet sand wasn't until Brian's coil almost touched in front of the boardwalk as Brian had the cross did he get any signal at all. On done well here over the past few weeks.


the other hand, the Tiger Shark could hit it almost an inch or two deeper than it had been found. We hunted this beach and two others the rest of the day and while we found only one more piece of gold, a small nugget ring, we did find several dollars in coins and other interesting "trinkets." Brian was impressed with the Tiger Shark's performance and was considering switching from his ol' dependable pulse unit for his daily searches on the New Jersey coastal beaches. SUMMARY The Tiger Shark's unique hybrid circuitry is extremely effective in allowing it to be used in both salt water and fresh water environments as well as all types of land sites. Treasure hunters can now have a single detector that works well in all areas rather than being forced to sacrifice performance or buy two different detectors. Tesoro detectors have developed the reputation of being extremely sensitive to even the smallest of gold objects and the Tiger Shark continues to fulfill that reputation. Considering most beach and water hunters are searching for gold jewelry in addition to coins and artifacts, the Tiger Shark won't be a disappointment. The only drawback with the unit is the need to open the case to adjust the sensitivity (typically the volume and threshold would not require readjustment once you set them). On land, this is not a problem; however, one should be careful to protect the internal electronics from blowing sand and spray when making an adjustment on a saltwater beach. The Tiger Shark comes with the standard lifetime Tesoro Electronics warranty and sells for $749. Tesoro offers an optional 7-inch and 10.5 inch searchcoil, which further enhances the Tiger Shark's versatility. If you are looking for a quality detector that is equally at home on a beach or underwater as well as the local park or even a long-forgotten battlefield, you should take a close look at the new Tiger Shark. MDI


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by Ron Barnes

Reprint from MDI 20

This report began with a phone call from James Gifford of Tesoro Electronics asking me if I would be interested in doing a report on their new I.D. detector-the DeLeón. Would I? Show me the detector! In a few days, the familiar brown truck rolled up to my shop. In all of about 45 seconds, I had the carton opened and had begun the assembly process. In approximately 3 minutes, I had the DeLeón ready to go. My first impression was "Wow! How do they put so much into such a small, lightweight, well-balanced machine?" When you hold the DeLeón in the proper detecting stance, it feels like it is merely an extension of your arm. When swinging this little "dynamo," you cannot believe how effortless it is. When assembling the DeLeón, I want to stress the fact that you "snap" the battery doors close after fully inserting the battery packs. After a few moments out in my test garden, I noticed one of the battery compartment doors had opened. If this happened out in the field or woods, I would have had a problem. After inspection of the door, I discovered that it was operator error and not the machine. I had not followed the directions in the manual and had not fully installed the battery pack. Read the book first. My test garden consists of the following basic targets: penny, nickel, dime, quarter, gold ring, pulltabs, and an iron nail. All of the targets are a measured 6" deep. The DeLeón detected and identified each target accurately. It wasn't until I held the coil between 3 and 5 inches off the ground that the machine started giving the "I am not sure" type response. Folks, that kind of depth on a good target I.D. is remarkable. I have


machines in stock at twice the price that can't do that. The DeLeón's controls are simplicity exemplified. Three knobs and one toggle switch control this powerhouse of a detector. The threshold knob is set to a light buzzing sound and with that done, you can simply forget that control. The next knob is the on/off sensitivity control, which in essence controls the depth (achievable) and stability of the detector. The remaining knob discriminates out unwanted targets. Just remember that the higher you set the discriminate control, the more good targets you can be shutting out. Also, at the higher discrimination settings, there is normally a slight loss in depth. That leaves one control, the toggle switch, which enables the following 3 modes: battery check, discriminate mode, and all metal mode. At full battery charge, the battery check displays 8 squares. As the charge drops off, the squares start disappearing. I like this system because you can tell at a glance approximately how many hours you have left on your power supply. After about 20 hours of "off and on" detecting, my unit was still showing about 75% (6 squares) of power left. I think Tesoro's estimate of 10 to 20 hours of battery life is very conservative. Now for the fun part folks. This is a fun machine to use for hunting. None of the ground balancing touch pads or programming to fiddle with. Turn this lightweight powerhouse on and go get 'em!! Targets, that is.

This detector will actually show you if the target is too close to the coil for proper I. D. "Raise coil" will appear when the machine is in overload. Simply raising the coil will give the detector the breathing room it needs to analyze the target and give its opinion. The DeLeón gives you several important bits of information to help you decide to dig or not to dig. The large display numbers are a real benefit to all of us but especially helpful to those who have trouble seeing the numbers on most meters. The depth number is displayed to the far left on the screen and is very accurate on buttons and coin-sized targets. The most helpful piece of info is the bar graph. The manual advises that if more than one segment is displayed, then it is probably an iron target. I can say with certainty that if one segment of the bar graph locks in and the number displayed locks on, you can "bet the farm" on the I.D. of that particular target. If you had several segments displayed, it was iron! I used the DeLeón on several beaches, lawns, woods, and even used it in a competition hunt down south that's notorious for the amount of iron remaining in the ground. For the novice to the average competition hunter, the DeLeón could save them a lot of time in proper target identification. The best test of the DeLeón's power came in a field that I had just gotten permission to detect. The field was adjacent to a major highway that I traveled daily. I did some research on the area and learned that several businesses had existed along the field dating back to the late 1700s. I had about 2 hours left in


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the afternoon before I wrapped up this field test. I took along an extra Tesoro for the property owner and would you believe that he hunted with me? I spent a good deal of time checking his targets with the DeLeón meter. He came up with a pistol ball and musketball from the War of 1812 and/or Civil War period. I found a copper badge with a number on it in old English script, still to be identified. But by far the icing on the cake for the DeLeón was a Seated Liberty half-dime dated 1848 at a measured 11+ inches and an 1865 Indian cent from 10+ inches. Both finds were witnessed by a curious detectorist who walked out into the field. I was digging the halfdime while he chatted. When I got down to the top of my trowel, I could see the, "He's got a beer can or a horseshoe," look on his face. All the time I

was mentally saying, "Baby, don't fail me now." When I finally checked the hole again and didn't get a response, my spectator grew silent. I started brushing away the rich humus dirt when lo and behold, there was lady Liberty smiling at me. He asked me to put the trowel back in the hole. He had to see it again-11+ inches. About thirty feet farther out in the field, the same scenario. I took a 6" to 8" deep plug and started scooping out more dirt. Bingo! An 1865 Indian cent in great shape at 10+ inches deep. He said, "I think I need to upgrade my machine to a lower priced one." He asked if I had a business card with me. I told him to follow me to my vehicle. As I was walking off the field, my host

advised me that the machine I loaned him was great, but he wanted the one I was using. Oh well, I guess I can part with another DeLeón. I even got two of my grandchildren involved in the field test. Crystal and Matthew thought it was a cool machine. I don't know whether that statement was due to the fact that there was actually an inch of snow on the ground or because it found money. Later, I was assured that it was because of the coins found. Success! Two new converts to the hobby. The only feature that would complete this detector would be a frequency shift for use in competition hunting. Although there were only a couple of detectors that caused interference, it was still a distraction. But let me emphasize right now that I honestly do not believe there is a better I.D. machine on the market in or out of this price range. Lightweight, easy to operate, accurate, out standing depth, and a lifetime guarantee. Tesoro has done it again!MDI


Several months ago, I returned my metal detector to your organization for repairs. The detector now works perfectly, and I am very pleased with its performance. I am even more pleased with the customer service that I received. I feel you went above and beyond the call of duty in helping me with my problem. Once again thank you for your help. You may be assured that I have passed along what a great company you have many times. English (a rare occurrence in today's business) and were very knowledgeable regarding your product line and my service needs. All my questions were answered quickly and I felt comfortable knowing my product was in good hands. To me TESORO means quality, not treasure. Your corporation sets the standard for which other companies should strive to achieve. I can think of no other companies which produce a product line with such high standards of quality and craftsmanship that they back it up with a lifetime guarantee. I give your staff, your company, your workmanship all a 5 STAR rating. Tesoro fan for life. brand new. For that I am very grateful to all of you that work hard to give us a great product! I have always been a fan of Tesoro and will always be one. I love the Stingray since the day I bought it back in `94/'95. I just bought a Tejon too this year and love that detector as well. Thank you for taking such wonderful care of your customers and your detectors. Sincerely,

Don Weston Sinking Spring, PA

Bruce Rowan Quincy, FL (Tesoro Cutlass µMax)

I recently sent in my Inca Metal Detector for repairs... It is rare that I write letters, especially letters of gratitude and thanks. But after dealing with you company and your staff I felt compelled to do so. Let me start by saying everyone that I had spoken with, including the receptionist that answers calls, to the technician, Rusty Henry was a delight to speak with. They spoke perfect


Calvin Henderson Phoenix, AZ

Dear Tesoro (Gifford family, Rusty and everyone) I just wanted to write and give you my sincerest thanks for fixing up my stingray detector. I just sent it in because I felt the sensitivity has decreased over the years. You all fixed it up like it is

I know the Lobo is a great nugget machine, but it's also a terrific coin and relic hunter. While relic hunting an old rach site, I found my first silver dollar, an 1883 Morgan in good condition. The same hole produced an 1897 Barber half in very good condition. The Lobo covers the ground really well and sicriminates the iron while still finding the elusive dollar gold coins.

Andy Kmetz Cheyenne, WY


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by Joe Patrick

Reprinted with permission from Lost Treasure March 2001

In the mid 1980's, Tesoro Electronics introduced a new type of metal detector that gave operators a way to eliminate digging most pulltabs without eliminating nickels, gold rings and coins. This technology was named Notch Discrimination. I remember very well one of my early experiences using an original Golden Sabre... I was attending a local club hunt, at the site of an old picnic grove near Pittsburgh, Penn. Understanding the advantage that notch would give me over my no-notch competition, I decided to use the notch function during one of the hunts. As you might imagine, there were many searches, all covering the same small plot of ground during the 45-minute hunt. As I followed about 100 feet behind, I watched two club members "run" a pattern just below the top of a small ridge. As I got to where they had just searched, I heard the unmistakable sound of a good, but weak, target. As I began my retrieval, Frank and his partner walked over to see what they had just missed. Well, their eyes about "bugged-out" when I pulled a 1922, 10K, Curry College class ring out of the hole! That single discovery convinced me of the power and advantage of using Tesoro's notch system. Tesoro's Golden Sabre detectors have been very popular with detectorists, so it's no wonder that Tesoro "fans" have been asking lately, "When's the 'next generation' Golden Sabre coming out?" Well folks, it's here-and I can tell you that it is one, sweet metal detector that is just loaded with new features and performance.


FEATURES One of the most striking and notable features and improvements of the new Golden µMax is its new 9 by 8-inch oval, concentric searchcoil. Not only does this coil improve detection depth, but I have noticed that it can actually sense shallow targets that are slightly outside of its perimeter. This makes its ground coverage ability outstanding. The new coil has a very thin profile and open frame design making it lightweight and easy to handle for such a "large" size. For the past several years, many Tesoro users have been commenting

about, requesting and waiting for Tesoro to add audio tone identification to their new models. Well, the wait is over. The Golden µMax has both audio tone identification and VCO (voltage controlled oscillator) all-metal pinpointing. The audio tone ID works in the discrimination mode and has four distinct and different tones to indicate a large surface target or overload condition. When a target is too close to the coil, it creates a very large signal. The Golden µMax responds with a "double beep" signal to let you know when this occurs.

The other four audio tones are: 240 Hz for iron, foil and very small gold rings; 315 Hz for foil, nickels, small gold rings and some pulltabs; 370 Hz for most pulltabs, some gold rings and screw caps. The highest and last tone is 500 Hz for pennies, silver and clad coins, etc. There can and will be some overlap of target signals and tones and target ambiguity, but I found the audio tone ID to be an immense aid in "classifying" unknown targets still in the ground-although, I wish it had a little more frequency spread (separation) between the four tones. Once a target is located, switching to the pinpoint mode activates the VCO pinpointing audio. This is a slowmotion all metal tone that varies from 260-420 Hz depending on the target's size, depth and metallic composition. The closer you are to the target and its center, the higher the tone of the pinpointing signal. I found this feature to work well and found I began to like it more as I used it. I, personally, prefer Tesoro's single-tone modulated audio for pinpointing and I wish they had incorporated a switch to select either standard or VCO audio for pinpointing. Some may disagree with me on this, but it would be my preference if possible. The Golden µMax's notch feature has "NORMAL," "WIDE," and "OFF" settings. The Normal and Wide settings are used in conjunction with the "NOTCH WIDTH" control to eliminate the unwanted target(s). This feature works well enough but may be a little too difficult to understand unless you have a Golden µMax in hand. Basically, you adjust the DISC control to a low setting, perhaps to just eliminate iron and foil. Then, you adjust the notch to eliminate pulltabs. By doing this, you have the best chance at finding most


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coins and many types of gold rings without digging pulltabs. This is just one example of many that can beaccomplished by using notch discrimination...and it is exactly how I found the 1922 Curry College class ring. It does require careful adjustment though and a total understanding of its operation to obtain maximum results. Tesoro's Golden µMax has four controls and two switches that control its operation. At the top right side is the THRESHOLD control, which is used to set the All Metal threshold audio. Just below it is the SENSITIVITY and POWER on/off control. At the bottom right side is the DISCRIMINATION control. At the left side is the NOTCH WIDTH control as explained above. Located at the bottom center is a threeposition toggle switch used to set the notch OFF, NARROW or WIDE. The other toggle switch is used to test the battery and to select either the ALL METAL or DISC operating modes. The BATT TEST used on the new Golden µMax is also something new. Previous Tesoro models have used the "tone-on-power-up" method to test the battery. With the new Golden µMax, you can test the battery at any time by simply pressing the toggle switch to the BATT TEST position. A new, fully charged battery will produce 6 or 7 beeps. When you hear only 1 or 2 beeps, it will be time to replace the battery. I like this battery test method, but sometimes, during pinpointing, I would move the switch too far to the left and unintentionally enter the battery test mode. The Golden µMax weighs just 2.2 pounds and is housed in Tesoro's miniature µMax housing. Their standard 3-piece locking pole assembly is used. Tesoro's typical high-quality is readily apparent in the Golden µMax and overall, it provides an outstanding combination of performance, comfort and ease-of-use. FIELD USE I had an opportunity to use the Golden µMax at several different locaTESORO ELECTRONICS, INC.

tions. My first time out, I searched a high vista overlook above the Monongahela river. This site produced several Indian Head cents and an old metal button. The tone ID, VCO pinpointing and overload signal made detecting very informative-something I am not accustomed to for such a small, lightweight detector. I can tell you that the Golden µMax makes a great "woods" detector. The only complaint I have is that the open coil design catches on branches and stubble. A solid coil cover would eliminate this problem. Other than that, I was well pleased with its performance and features. I am amazed at what it provides for such a small package. Its sensitivity, depth capability and discrimination are all "typical" Tesoro. Those who are familiar with Tesoro detectors know that they discriminate very well, have above average depth capability and are very sensitive, especially to small targets. Having used Tesoro detectors for many years, I can tell you that the new Golden µMax now ranks as one of my favorite Tesoro's. Site number two turned out to be a dud. It was the location of a 1793 homesite, with the home still standing! Unfortunately, too many things have happened over the years including landscaping, scrap auto parts and numerous outbuildings being constructed...all of which left little original ground available for detecting. I did discover though that the Golden µMax handles trash very well and the overload signal saved a lot of unnecessary digging. Having no luck at this site, I moved to the location of another old colonial home a few miles up the road. Using the Golden µMax with notch off and preset discrimination, I was able to identify good targets by listening to the tone ID...this was enjoyable detecting. Having about two hours to detect, I managed to find a few early Wheat cents, an old Crucifix, several old buttons, a brass Terret ring (horse harness) and an 1896 Indian Head

cent...which cleaned up very well. CONCLUSION I have been a big Tesoro fan and advocate for many years now and can honestly say that I have not used any Tesoro metal detector that did not perform well. Since the early 1980's, I have used most of their models at one time or another. Always, I have found Tesoro detectors to provide high performance and ease of use at a price that is very reasonable. The new Golden µMax continues that fine tradition and shows that Tesoro, as a company, is still listening to the wants and wishes of their customers. The Golden µMax is a fine detector with a lot of surprising features and is certain to please many coin and jewelry hunters. I also believe that it is quite capable of relic hunting, as many Tesoro models have proven to be, especially now with the new 9 by 8 and larger searchcoils. At a retail price of $529.00, the Golden µMax comes with a 9 by 8 searchcoil, 9-volt Alkaline battery, 26page operator instruction manual and Tesoro's Limited Lifetime Warranty coverage. Be sure to check one out...I know you will be impressed...I am!


Great Treasures

I recently bought a Tiger Shark. I have used other brands for about 8 years now, but I have to say that I love this machine-it picks up the smallest items. I like to snorkel with my water machines. I tend to find a few items that other people do not. It is a little more work, but it is great exercise. A friend of mine knew about this so he sent a person my way. To make a story short: a guy was holding onto his future wife's engagement ring at his parents' cottage and lost it. It took me 3 tries but I did find it in about 8 feet of water. The grass was approximately waste high in the water with nearly 6 inches of silt. To replace this ring would have cost $2,500. The main stone is 1 CT with 5 stones on each side of the ring. Thank you for a great product!

Jason Houle Greenfield, MA


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by Michael O. Smith

Reprinted with permission from Western & Eastern June 2002

I've owned and used Tesoro detectors for years, so when I received the new Cortes for field-testing, I couldn't wait to get started. The box was smaller than I had expected, nice for packing/shipping. The unit has three poles that interlock by button snaps, and the S-shaped pole has a padded armrest with the battery compartment underneath. This compartment holds two AA battery packs of 4 batteries each. They pop in by simply compressing one end. Just forward of the armrest is the control box. The most notable difference is the meter display. Another obvious difference is the slightly elliptical, 9 X 8" concentric, spoked search coil. I had already used a similar coil on another detector and knew that this was going to be a great asset for the Cortes. I was pleased to see how comprehensive and thorough the instruction manual is, since I was about to jump into uncharted waters. The first day it was raining cats and dogs, as we say in the South, and I was homebound. So, I read the manual twice, through and through, carefully following the one, two, three's and A, B, C's of Cortes' operation. I was encouraged by the ease of these instructions and the predictable results I got. The specifications for the Cortes include a built in 2 ¼" speaker on the back of the housing, with louvered openings that help keep out dirt. This is also where the ¼" headphone jack is located. Headphones are a must since they not only accentuate those faint fringe signals, but also help extend life to the batteries. After 30 hours of field testing I decided to change batteries, even though I still had ¼ of the battery graph left on the meter.


The detector operates at 10kHz and has an optimum operating range from 30° to 100° and from 0 to 75% humidity. It has the option of interchanging a variety of coils, as well as previous Tesoro 5-pin uMax and Series II coils. One of the fea-

Front face of control box.

tures I like the most is Tesoro's lifetime warranty. I have taken advantage of it more than once. What a plus! Weight? How about 2.98 lbs. I hunt all day with such a light machine. The basic features include four operating modes: No-Motion, All-Metal; Sum Discrimination; Silent-Search Discrimination; and Notch Discrimination (narrow & wide). The discrimination mode is factory-preset ground balanced. The All-Metal mode is a manually ground-balanced mode with adjustable threshold level. The two Notch modes have factory preset widths. The Sum Discrimination mode provides improved target identification by averaging signal information and utilizes a 9tone audio ID. There is a backlit display, high or low, for hunting in dim or no light situations. The digital display identifies

targets in three ways: Displaying numerical, alpha characters, and a bar graph. It shows the probable target depth (best suited for coins) and battery life remaining. The meter works in all modes simultaneously, and also makes it easy ot tell whether the target is iron or other metal. The meter shows basic groupings of likely targets as follows: Iron and foil; nickels and pull-tabs (round and square); zinc cents and screw caps; copper cents and silver coins. However most of your attention will be on the bar graph which shows how much signal is in each of these categories, and most important is the number of the target response with 0 being iron and 95 being silver. There are a few tricks on some of the variants ou get with iron, but usually it reads as 0. The Sum toggle has 9 tones that correspond to the 9 bar graphs, which allows you to get a cleaner signal from your target and also adds the dimension of a tone-related identification. The basic tone response/quality of the machine is still the same as with previous Tesoro detectors. I actually relied on the sound more than any other identification feature. In All-Metal, you get a louder and wider signal the closer you are to the target. This being said, the meter number and bar graph help break the tie on whether to dig or not. It is also tremendous fun to second-guess your target before digging it up ­ sort of a personal contest between you, the detector, and reality. With experience you will be right most of the time, especially in recognizing targets as ferrous or nonferrous. The two usual exceptions were when the meter read 95 but had multiple bars lit up, and less often when there was a high ID number and no bars lit up. It does not take long to figure these readings out. To use the Sum switch, you simply push the toggle to the left and move over the target with a 2-3" sweep, and as the sound becomes one tone you will also see the bar graph settle down to one or two bars. At this point your reading is better defined, and the ID number is usually accurate. Most often you will be able to identify the target without the help of the Sum feature. Again, if it sounds good from at least one direction, dig it. Remember that the bar graph and depth are set for coins; as well as any modified


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there is a red "Boost" area on the sensitivcoin or artifact can vary your readings, so ity control that goes beyond 10. In areas identifying it as a good sound , or a target of low mineralization, I have found that I response on the meter, is the only excuse can go full Boost, which means higher you need to dig. gain and greater depth. Also, I have The notch feature has a wide and encountered no instability except around narrow setting. Narrow will phase out some type of electrical interference. pull-tabs and Wide phases out pull-tabs Enough basic information. The and Zinc cents. Remember that you can next thing I did at home was to gather a lose some gold rings at these settings. The wide variety of central portion of the test targets response graph allows a such as artiwide separation facts and between metals and coins. I air helps separate nickels, tested these rings, and pull-tabs and had my more accurately. When wife, Sue, Discrimination and write down the Notch is being used, the readings from meter will still indicate about 6". I what the target is and have included how deep. This is an the results outstanding feature. As along with this you can imagine, phasfield test. I ing out something while Cortez with finds. Finds made by must note that still being able to know Nathan Spalding there is some what it is has advanvariation due to different soils, humidity tages. Also, being able to see that you are of the soil, the orientation of the item and in an iron-rich area without getting a posits mass and distance from the coil. A itive signal from iron truly helps you pick good idea is to learn the likely response up on home sites or areas of concentrafrom distinct groupings. For example, the tion. civil war Minie ball is around 70; a 2 cm When you use All-Metal mode, lead shot, 75. This will give you an idea of you should ground balance the machine what to expect, especially if that is a likefirst. The procedure is very simple. All ly target in your area. In contrast, a zinc you do is lower your coil straight down cent is 77, so if you use the wide notch from about 10" to 1" above ground. If the setting to miss that pull-tab or zinc cent sound increases, lower the ground balance you may also miss the Minie ball, or a by turning the knob counterclockwise. If Spanish ½ real, which reads 75. it increases, turn it clockwise. There is no Always remember that there is need to reune, just repeat this operation overlap in readings from coins and variuntil there is no change in tone. The only ous relics. Most U.S. or larger foreign trick is finding an area free of iron to coins, as well as thick copper/brass, tend ground balance on; however, this only to read higher. Most .22 shells read about takes a minute or less. The other modes 7-9; foil and small aluminum reads very are preset and require no ground balanclow, around 2-7; shot gun shell readings ing. All-Metal gives a little extra depth, a may be anywhere from 18 to 43 dependmore accurate reading, and requires no ing on the make and size of the shell, as motion, which helps with pinpointing. well as orientation. Shot at 2 cm is 75, Again, the meter will work in All-Metal 1cm is 41, and ½ cm is 22. This machine and show what the likely target is, thus is so sensitive that I actually picked up a allowing you to leave the iron and pick up positive signal at 2-3" on a #8 shot, 1mm all the other targets. This, too, has its uses, the Gereral Service eagle read in the 55 as when you are trying to find a new site range. A thin gold ring was 6-12 and a 2 in a wooded area, or are looking for those cm brass flat button was 64; however ultra-deep targets in a worked-out site. sideways it was 30 to 50, depending on Sometimes the meter will give a response the angle, thus reflecting potential variaeven when there is no sound indicating tions in readings ­ another good reason to such targets. In the Discriminate mode,


dig if it sounds good or is other than iron. Now let's take a look at what this machine can do in the field. I started with some open areas, as I wanted to keep things as simple as possible during initial testing. I have some locations which, for all practical purposes, are worked out, but still have deep targets remaining. Most of these produced rich finds in their hey-day. Of course, when I do find something, I want a reasonable chance of it being a nice relic or coin. Of the seven sites selected for this evaluation, six were in that category, and one was new. It presented a 50' section of firebreak and the corner of a field. It was, however, pre-Revolutionary War... more on that in a minute. Site #1 was an area of couple of open fields next to a bluff. This area was well worked, but with each new machine I had tested it produced deeper or more difficult finds. Anything found here would represent an improvement in depth or sensitivity. At the end of the day, I had four deep .50 caliber round shot, eight flat buttons, a nice 3 cent piece, a 2" escutcheon plate from furniture, which was 10" deep, and about 10 other targets. One surprise was a coat-size, two-piece eagle "I" button with 50% gilt. This was most encouraging, so now it was time for a different type of site. Site #2 was a wooded area, mostly pine trees with a moderate amount of undergrowth and moist sand. Here I found 14 flat buttons, most of where were 6-10" deep. To my surprise, I found a Georgia state seal button. Unfortunately it was bent, and part of the back was missing; nevertheless, I had found a confederate button. I had never found any Indian trade items along the Georgia coast, but this was about to change. I found a brass arrowhead and a Spanish button from the 1500s. This was remarkable since the first settlement of the U.S., San Miguel de Gualdope, 1526, was less than a couple miles away. I also found a handful of varying sizes of shot and few other items. We had previously found relics there from the 1700s through the late 1800s. I have found a number of Colonial silver thimbles, but was pleasantly surprised to unearth an ornate silver one from the mid 1800s.


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Site #3 was dry and sandy, with a 1700s. One 3" piece of flattened lead gave lot of cactus. It had been a fairground in me a good signal at 16" and read 80. This the 1920s, but we had found no more was in pure, moist sand. Needless to say, Wheat cents on the last several trips. It I was no longer worried about depth. The was littered with trash, and that too was a other surprise I had from this site was a problem, especially an endless number of field-made pewter button with a dogwood .22 short casings. These gave a reading of flower on it, a design attributed to British 6 and I was able to ignore them without lieutenants, buttons just prior to the fear. Closely observing the meter, I got a Revolutionary War. What a great find, and "quarter" reading of 95, which turned out one that will have to be added to future to be a silver quarter. Next came a button books. This button was 8" deep, Mercury dime dated 1943 and two Wheat and read 20, and is solid and 1 cm in size. cents, one of them a 1910. I also found a Site #6 was one I had not visited Mercury wing skate charm that read 30. I for about ten years, and the pine trees knew that this should be a good target and were now big. Here I found a nice Indian it was. Site #4 was a semicleared area, an old home site that had yielded some Confederate buttons long ago. I had searched a number of times, hoping to find one more, but did well to get two Longview of the or three flats. Next to a big Cortes tree, my friend and I searched again, as several of us had done about four trade tomahawk and another Indian trade times this year. In the same area I had item, bronze and in the shape of an eagle's found a round shot three months earlier. I talon. I also found a 1772 ½ real and a got an iffy signal at 6" that read 65. I beautiful bronze candlestick from the could not believe my eyes... a beautiful 1700s. GMI button! My first. That one button Site #7, the last, was a "mixed would almost pay for the detector. I also bag" area that again had been largely found the trigger guard of a large Colonial worked out. Here I hit a little spot that I blunderbuss at about 12". I was surprised guess had been missed before. I found at how many small shotgun pellets I was four escutcheon plates and two drawer finding. This reassured me that I was pulls from the same piece of Colonial furmissing very little. I like to use the criss- niture, two Indian brass tinklers, and the cross and circle method of pinpointing, front brass fitting of a flintlock gun. One mentally computing exactly where the other surprise was a 1 cm pewter eagle center of the signal is. The small circle of button from 1811. I was sure that we had the coil is the most acute pinpointing area worked this area out. of the coil. Just before leaving, I got At this point, I felt very confident another good signal at 6" that read 60. It that I had covered most of the conditions was an eagle "I" cuff button, or so I needed to offer an informed evaluation of thought. When I got home, I discovered the new Cortes. that it was actually an "R" with some of As with any new machine, there the gilt remaining. are a few things that might be improved to Site #5 was new, but within 100 suit the individual. I have a vision probyards if a Colonial home site we had hunt- lem with contrast and glare, so for me a ed heavily. It was a firebreak along a bigger display screen and glare proof bluff. The home site was recorded as glass would be better. Also, I found that c.1735, but we had never found any but- going through thick woods could pull the tons earlier than the revolutionary war. In battery door open. The batteries remained the firebreak and on one corner of the tightly in place, though. A different catch field, I found a 1723 British copper in might be better. Finally, I like the black Very Fine condition and an 1838 Spanish search coils instead of white, but those ½ real, plus a lot of flat buttons. A couple were the only changes I would consider. I were a type from the late 1600s and early did have some trouble in heavy iron areas


when I set the discrimination above iron and used the notch. I lost some depth and had trouble picking up a good target next to a bad one. That being said, I was most impressed with the performance of the Cortes in these conditions and at different settings. When I set up between minimum and iron, I could tell that a target was iron without digging, and also if it was a good target, even next to a piece of iron. This did not seem to influence depth or the quality of the signals. In conclusion, I was most comfortable hunting at this discrimination setting and listening for any good signal, from at least one direction. If the sound was good, I planned to dig but still spent a little time trying to identify the targets by the meter readings for depth and ID number. This was a lot of fun. If it was possibly iron, not reading as 0, I worked the meter for a while to help make the final decision to dig or not to dig. The new Tesoro Cortes is a very versatile detector and light enough to swing all day. The batteries could last as long as 40 hours, and over 30 for sure if you are using headphones. There is a wide range of hunting settings to use with this machine. When I hit one area of wet salt marsh where I was getting back some false positive signals, I backed the sensitivity back to 8. The result? No more disturbance, just smooth performance. I placed an ordinary plastic bag over the detector during a rainstorm and had no problem with it operating erratically. In areas with heavy concentrations of pulltabs or .22 shells, the target ID number and notch features saved me a lot of time and backaches. A number of times I dug good signals that I would not have otherwise, due to the meter readings. Finding occupied areas in the woods was also very easy, and I cannot say enough about being able to determine target depth and identity in All-Metal mode ­ a major advantage. As for price, I probably paid for a couple machines with the finds I made during these field tests. I would highly recommend the Cortes to anyone who has some good sites and wants to work them for all they're worth. You will find it easy to use, with a lot of options and little room for disappointment.



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by Ben Marshall

My interest in treasure hunting was aroused when I read a magazine called Treasure Hunter. I went to a local metal detecting club which held a meeting once a month at the Oxford bus company premises. A club member had a used Tesoro Bandido for sale which I purchased. The club had digs every Sunday at farms surrounding the city of Oxford. After eight years, I am still using a Tesoro and have my first Bandido as a backup. My second detector was the Bandido II µMax. I had it about two years but exchanged it for a Cortés, which I was pleased with and had some success. I now have the Laser Hawkeye. My first Roman coin looked like a flat disc with a smooth green patina. It was the size of a dollar. After immersing it in descaler for a while, I used a wooden toothpick to remove the corrosion to be able to identify it. It was an Antoninus Pius (138-61)-still my oldest coin. Not a very good example after 1,860 years but still a find nevertheless. My most recent Roman find was a bronze Constantine I (307-37) Victory on Prow (very fine condition as you can see by the photo). I also found a Constantine I with wolf and twins (on the reverse) two years ago at a different location. I found my first silver Hammered King Charles I penny on a footpath running through the farm a few inches below the surface (using my first Bandido). It was smaller than the original size as it had been cropped. The silver was clipped off around the edges to save, and then when enough was accumulated from a number of coins, it was then melted down to be sold, illegal of course. My next silver


Hammered, an Edward III, also a Bandido find, was lost again the same day. I had put it in a small clear plastic envelope and put it on a wooden mantle piece of the fire surround at home. When my son visited us that day my wife showed it to him. She put it back on the mantle piece but unknown to her it had fallen down a gap between the wall and the shelf. This was the conclusion I came to when it was nowhere to be found. It was later in the year when I recovered it. I had to remove the wooden skirting to reveal a gap at the bottom of the surround and with a hacksaw blade managed to hook it out. In August 2004, I was on a club dig when I had a good signal on my Hawkeye. I dug at the spot and four inches below the surface, I unearthed a small circular object. A Finds Liason Officer from the Berkshire Museum was on site. I showed my find to the officer, who upon cleaning off the soil, said it was Treasure Trove. We have Treasure Act in the U.K., where any finds older than 300 years or having precious metal content are classed as Treasure Trove and have to be declared. The officer retained my find giving me a signed receipt saying that it would be sent to the British Museum in London for inspection to determine if it was Treasure Trove. I later received a letter of confirmation from the Museum that they had received it, and after a few months, I was sent a treasure report informing me that my find qualified as treasure under The Treasure Act 1996 in both age and precious metal content. Oxfordshire Museums Service had expressed interest in acquiring it, subject to valuation. The treasure report identified it as a circular brooch of silver dating from the late thirteenth or early fourteenth centuries. An inquest and valuation would be held and I

will be notified in due course. At the time of writing this article two years has elapsed. UPDATE Bringing you up to date on my silver brooch find. My find is on The Portable Antiquities website ( but described as a Cholsey Silver Filigree Buckle-Cholsey being the location of the find. The British Museum held a Treasure Inquest at Oxford County Hall on the 21/02/2007 which I had to attend as a witness. The coroner deemed that it was Treasure Trove and sent the report to The British Museum. I was then notified that the Treasure Valuation Committee had recommended a value of £240-00 which I accepted. I will have to share the reward with the farmer as we had a 50/50 agreement. I had another letter from The British Museum saying all parties had agreed to the valuation and I will receive my reward within four months. So at last after three years it has come to a conclusion. The other photographs are a small selection of my Roman and silver Hammered finds plus some artefacts-crotal bells, musketballs, buckles, clothes fasteners, thimbles. It is wondered why so many thimbles were found in the fields. I put it down to that the produce harvested was put into sacks for transportation. The openings of the sacks were sewn together to seal them. Plenty of thimbles but not any needles? The Elizabeth I Sixpence Hammered is my favourite at the moment. This find won me the Find of the Month certificate in May 2002 at the club. Also, the Henry III cut quarter is so small but the Hawkeye detected it. That is how they used to give change in the old days, cut halves and quarters. In the eight years I have been involved in this fascinating hobby, I have yet to search on a beach. I must do that some time. Finding present currency will be a new and instant profitable experience. MDI


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Great Treasures

I bought a new Tesoro Vaquero and love it. Recently, I took it out to a Revolutionary War site that was hunted heavily before. After spending only about 20 minutes, I got a hit near an old log. It was a good loud solid hitthe type that makes you think to yourself that it is a can. Well, I am someone who likes to see it no matter what I think it is. And let me tell you that this strategy paid off. I cut about a 6-inch deep plug and scanned it. Nothing. It was still in the hole. So I pinpointed it and it was directly in the center. I stuck my knife in and kept digging and out popped the most gorgeous shoe buckle I had ever seen in perfect condition and totally intact. My eyes were as big as dollars as I yelled for my friend to come see what I had found. I couldn't believe it. This was my first war relic ever and it was nice. I have tried all types of detectors in the past and this is by far the best I have used. It works just as well as super-expensive detectors and is affordable. Just look at this buckle. That's why the saying is true, "Tesoro does mean treasure." My only regret is that I waited this long to try a Tesoro. I will be upgrading to the 12x10 coil so I can cover more ground with this amazing machine. Thanks for letting me ramble on. I am on cloud 9. A very happy Tesoro owner.


There are almost as many recovery techniques as there are treasure hunters, but the methods shown here are two of the most popular. Whichever method you choose, remember that responsible treasure hunters take pride in their ability to leave the soil and vegetation undamaged. Irresponsible treasure hunters give the rest of us a bad name and may ultimately destroy the hobby for everybody.


Used in less moist lawns where targets are not so deep (1 to 4 inches) and where "plugging" is objectionable. This method requires more practice but is much less damaging to grass than Method 2"Plugging." After pinpointing the target, use a nonmetallic probe such as a modified fiberglass fishing rod or a metallic probe such as a blunted ice pick (the former causes less damage to the target) to locate the target depth (Fig. 1A). Next, insert an eight-inch screwdriver on center just above the target and rotate slightly to open the ground (Fig. 1B). Now, insert the screwdriver just under the target at an angle and lever the target to the surface (Fig. 1C). Brush all loose dirt back into the hole and close the hole by exerting pressure all around the opening (Fig. 1D).


Used only where allowed in natural wooded areas and very moist lawn areas. Plugging in hard dry ground can damage grass roots leaving yellow "dead spots" in time. After pinpointing the target, use a six-inch sturdy hunting knife to cut three sides of a four-inch cube around the target center (Fig. 2A). Cutting a "hinged" cube-shaped plug rather than a complete coneshaped plug will properly orient its return, prevent its removal by a lawnmower, and lessen the chance of scratching the target. With the knife blade, carefully pry against the cube side opposite the "hinge" and fold back (Fig. 2B). Sweep the searchcoil over the plug and hole to isolate the target location. If the target is in the plug, carefully probe until located. If the target is in the hole and is not visible, probe the bottom and sides until located, then remove it (Fig. 2C). Repeat sweep for additional targets. Replace all loose dirt with the plug. Seat the plug firmly with your foot (Figure 2D).

Howard Whittaker West Hurley, NY

Adapted from "Tools 'N Techniques" by Robert H. Sickler


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Lobo SuperTraq Golden µMax Silver µMax Tiger Shark VLF/TR 10 kHz

M 4.5 12VDC 8-AA's 10-20 8" RC5




Detector Type VLF/TR Operating Frequency 12 kHz

VLF/TR VLF/TR VLF/TR VLF/TR VLF/TR 10 kHz 14.3-14.7 kH 14.3-14.7 kH 17.2-17.6 kH 10 kHz

VLF/TR VLF/TR 17.5 kHz 10 kHz

VLF/TR 10 kHz

Recommended Uses

Coin & Jewelry Hunting Relic Hunting Gold Prospecting Competition Hunting Cache Hunting (using largest coil) Fresh Water Hunting - shallow wading Beach Hunting - wading salt water Diving - underwater salt or fresh


Motion All Metal Mode (silent search) All Metal Mode (threshold based) Auto Tune (automatic threshold retune) Normal Tune (manual threshold retune) Adjustable retune rate VLF Silent Search Discriminate Mode Pinpoint Mode Operrating Frequency Shifter


P Ground Balancing Type Turn-On-And-Go Operation Target ID Display Notch Filter Discrimination Multiple Tone ID Target Summing Mode Adjustable Audio Frequency Max Boost Sensitivity 2 Approximate Weight (lbs.) Convertible to Body/Belt Mounts Interchangeable Searchcoils Power Supply 9VDC Batteries 1-9V Battery Life (hours) 10-20 Automatic Battery Test Waterproof Control Housing Speaker and Jack for Headphones Water Resistant Built-In Headphones P P M M P A P M









9VDC 1-9V 10-20

9VDC 1-9V 10-20

9VDC 1-9V 10-20

12VDC 8-AA's 20-30

9VDC 1-9V 10-20

12VDC 8-AA's 20-30

12VDC 8-AA's 10-20

12VDC 8-AA's 20-30

Searchcoil Size 5.75" RC

8" RC

9x8" C

9x8" C

9x8" C

9x8" C

10" EW

9x8" C

9x8" C

Excellent Choice ! -- Outstanding performance to al other detectors in its class Performs Well ! --Though not specifically designed for primary use in this type of hunting. Not designed for this purpose but can function adequately as such if needed. no stars -Not designed or recommended for this type of treasure hunting.


C = Concentric RC = Round Concentric EW = Elliptical Widescan RP2 = Round Pulse RC5 = Round Concentric waterproof search coil

Ground Balance:

A = Automatic M = Manual P = Preset


Pulse induction detectors not affected by ground mineralization Detector is waterproof to depths of 200 feet.

All searchcoils are water resistant






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by Casey Stern

There will be many models to consider when purchasing your next metal detector. The key to figuring out which detector suits your needs and budget is to ask yourself some key questions. Whether you have years of experience, or are new to the hobby, these questions and answers will help prevent you from buying the wrong detector. Your experience, the type of hunting you intend to do, and the detector's functions are the primary factors you should consider when choosing your next detector. How much experience do you have? This would appear to be a straight forward answer, unless you are an experienced land hunter who would like to start detecting underwater for the first time. Maybe you have been hunting coins and relics for 20 years, but would like to begin prospecting for gold nuggets. Not only are the searching and digging techniques different, but the detector requirements also vary depending on the targets you are trying to find. In these situations, a veteran detectorist may be somewhat of newbie. On the other hand, the expert may be looking for more precise controls than their current detector offers, building on prior knowledge and skills with the latest technology. Your experience level should play a role in the complexity of the detector that you are considering. What are you trying to find? Many people want to start metal detecting, but are not sure whether they will be specifically looking for coins, jewelry, coins, gold nuggets, or relics. Generally, the beginner wants to find a little bit of everything, but does not realize that different detectors are engineered for finding different targets. There is no one BEST detector that can do it all. However, there are some great general purpose detectors that can do a little of everything well, just not any one thing exceptionally well. If you are new to the hobby, a general purpose detector is usually a good choice. When engineers design a detector,


they must design it specifically for the intended targets. For example, if you are going prospecting for gold nuggets, a specialized nugget-detector with a very high gain is recommended. This sensitivity to tiny pieces of metal can help locate the gold nuggets which tend to be very small compared to a coin. A coin hunter using a nugget-detector would find this annoying because they would be finding all of the bits of trash, such as pull-tabs that have been ground up by a lawnmower. That being said, a nugget-detector can do a good job finding coins, just not as good and efficiently as a coin-detector. What are the ground conditions? Knowing where you will be hunting is very important. Most experts know whether their ground conditions have low, moderate, high, or varying amounts mineralization. For instance, most locations where gold nuggets can be found have a fairly high concentration of minerals that can interfere with locating nuggets. The detector requirements vary depending on the ground conditions where you will be hunting. The amount of ground mineralization present determines whether your detector will need an adjustable ground balance control or not. In areas with low to moderate mineralization, a detector with the factory preset mineral rejection will work sufficiently for most detectorists. The preset mineral rejection should not be confused with an automatic ground tracking function, which continually ground balances as you detect. Some manufactures advertise preset mineral rejection as automatic ground balance, which can be confusing. Detectors are either preset to compensate for most conditions, or have the ability to be ground balanced either manually or automatically by a computer. When the soil is "hot" due to a lot of mineralization being present, either a computerized ground tracking system or a manual ground balance control is recommended. The ground balance

function will help prevent the mineralization in the soil from interfering with locating targets. Ground balancing keeps the detector stable, and operating at optimum performance. Being able to ground balance when needed is a must for both the expert and beginner. Having your detector ground balanced correctly to the ground matrix will increase your depth and sensitivity to targets. Determining the soil conditions where you will be hunting may be difficult for the beginner. The best way to find out is to consult your local dealer, metal detecting club, or an online detecting forum. You may find that you do not need a ground balance control for your area, which is an advantage for most beginners. What are the water conditions, salty or fresh? Salt water produces conductive conditions that must be compensated for by the metal detector. This is the case whether you are detecting on wet salty sand or underwater in the ocean. When these water conditions are combined with mineralization, or a lack there of, it is very important to understand some specifics so you do not end up purchasing the wrong detector. Most people who are unhappy with their water detectors bought the wrong one because they did not understand the difference among detectors that were designed for a very specific set of mineral and water conditions. A pulse induction (PI) detector tends to work best in wet salty conditions with moderate to high mineralization. Very low frequency (VLF) detectors are best suited for wet fresh water conditions with varying degrees of mineralization. This generalization does have a gray line. There are VLF detectors that work well in wet salty conditions, if the ground mineralization is not too high and if the salt water is no too conductive. The VLF detector is more sensitive to smaller items such as gold chains and small jewelry. It also has the ability to discriminate amongst items that are not valuable, such as iron and pull tabs. Pinpointing targets using a VLF detector is much easier compared to a PI machine. The VLF unit is an `allaround' detector, where as the PI machine is very specialized. This


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makes the VLF detector very versatile for those who would like to work in both wet and dry conditions. The PI detector is more stable than a VLF in wet salty conditions with higher concentrations of mineralization. A PI unit is not generally used on dry land unless it is a soft sand beach that is easy to dig. PI detectors are an all-metal machine due to the lack of discrimination ability, meaning you dig everything, including trash. The pinpointing is not as precise, which is the reason why most people use them in soft beach environments using large scoops. Ideally, you would have both a VLF and a PI detector if you hunt in both salty and fresher water conditions. Since most people do not have a large enough budget to buy both machines, some compromises must be made. If you plan on spending most of your time in the wet salty sand, or in the ocean a PI unit is probably the best choice, unless you do not want to dig all targets. If you will not be spending the majority of your time in wet salt conditions, the VLF may be best for the occasional salt beach hunter who primarily hunts in fresh water conditions. Many people use a VLF unit successfully on the salty beaches and in the ocean, but this is because the ground is not highly mineralized. The VLF users also understand how to tune their detector in less than ideal conditions to maximize their finds. The key to picking the best waterdetector is to understand the ground conditions, and how much of your time will be spent at both fresh and salt water beaches. You also need to be aware that the PI detector is more stable in the wet salty conditions, but also has some disadvantages when it comes to digging. Consulting with other local dealer or an experienced detectorist in your area is a good idea. They often know whether one or both machines will work on the beaches that you plan on hunting. How many controls do you need, given your experience? Novices and experts often have different needs. The number and variety of controls that one needs depends on several variables. An advanced detectorist may need more knobs, meters, displays, and switches to fine tune the machine. This can give them an edge in achieving the maximum depth and sensitivity capabilities


to find the elusive targets that others have missed. A machine that matches your experience level will increase the odds of success. Having too many controls is generally a disadvantage for the person picking up a detector for the first time. The beginner might spend more time adjusting the detector than actually hunting targets, which can be frustrating and cause them to miss targets due to improper settings. Fewer controls will definitely get a less experienced user into the field faster with less of a learning curve. A seasoned detectorist with an entry level detector can generally do better than a novice with an expensive machine with all of the bells and whistles. Which detector suits your needs? .... Now that the basics have been covered, you should have some answers that will guide you towards a specific type of detector. You should know whether you want to find a little of everything, or if you will be going after specific items such as gold rings or gold nuggets. You should also understand the importance of mineralization in the areas where you will be hunting, and whether you will need a ground balance control or not. If you are not sure at this point, a general purpose detector is a good start. Do you want to find a little bit of everything? A general purpose detector typically has fewer controls and is designed for both beginners and experts. Most of these units have a preset ground balance which can handle most ground conditions. These units are ideal for coins, jewelry, relics and dry beach hunting where there is low to moderate mineralization. They are easy to use, yet have sufficient depth and sensitivity capabilities for all levels of experience. Tesoro offers the Compadre, Silver UMax, and Cibola for those areas that do not have high mineralization. Should you find that you have moderate to high mineralization in your area, the Vaquero will fit your needs with an adjustable ground balance to compensate for the hot ground. Are you looking for coins and jewelry? Detectors designed specifically for coins and jewelry can give you information about the target using one or more indicators. Audible and visual

indicators are the most common ways of giving the detectorist information. This information can be used to decide whether to dig or not. These target identification detectors (TID) use multiple distinct tones to indicate whether you have found a pull tab or a coin, while others have a visual LCD screen. Some units have both. The TID screen gives a variety of information about the composition of the target, depth, and other useful data. It should be noted that both visual and audible target indicators are very accurate, but not 100%. For instance, round and square pull tabs are very close on the conductivity scale to a gold jewelry. In this instance, an amateur may not dig the gold ring because they think it is a pull tab not realizing how similar they appear to the detector. The more experienced detectorist will dig if there is any uncertainty as to whether the target is a gold ring or just a tab. When targets are located on the opposite ends of the conductivity scale, such as iron and pennies, the target identification is much more accurate. The beginner will learn through experience when to trust the ID, and when to doubt it. Three Tesoro detectors haveTarget ID capabilities: the Cortes and DeLeon have visual LCD displays. Additionally, the Cortes has a tone ID and a notch discriminator that helps increase the accuracy when trying to discern the pull tabs and screw caps from the jewelry. The Golden UMax is more compact, and offers a multi-tone ID as well as notch discrimination to separate the trash from the treasure. Would you like to find relics? Relic hunters want a detector that goes very deep and is sensitive to objects that are smaller than coins, such as civil war buttons. Tesoro designed the Tejon with these needs in mind. The Tejon has a high output transmit oscillator to push the signal deeper and an increased gain for sensitivity to the deeper and smaller items that other detectors missed. When this is combined with dual discriminators, the relic hunter can efficiently separate the trash from the good targets that everyone else missed. Do you have gold fever? Prospecting for gold nuggets is very specialized. Gold nuggets tend to be very small the


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majority of the time. If you want to find them, you will need a detector with increased sensitivity. The Lobo Super TRAQ has the ability to locate very small nuggets while automatically ground balancing as you hunt. This keeps the detector stable in highly mineralized ground which is typical in gold country. You do not have to worry about manually adjusting the ground balance as the mineralization matrix shifts throughout your hunt. The Lobo also has a discriminate function for hunting coins, jewelry, and relics when you are not out looking for nuggets. Will you be underwater, or on a wet beach? If you plan on spending most of your time hunting in wet salty sand, or in the ocean, the Sand Shark is probably the better choice between the two underwater detectors that Tesoro manufactures. The Sand Shark is a pulse induction detector that is designed for high mineralization areas that also have wet salt conditions. This unit can be completely submerged, so you can hunt the areas that the land detectors cannot reach. If the ground is not too mineralized, there is an alternative. The Tiger Shark works well in the ocean when there are low to moderate amounts of mineralization present. When considering which detector is best for you, finding out whether you have hot ground or not, is very important. The Tiger Shark is best suited for those who primarily hunt in fresh water conditions or occasionally in wet salty conditions. There are many ocean beaches where the Tiger Shark works quite well but this is not always the case. The Tiger Shark is great for those who hunt both fresh and salt water conditions. Are you still undecided? The most important general topics have been covered but there may be some technical questions that are unanswered. Finding out about your local mineralization may be the hardest question to answer, but your local detectorist or dealer should be able help answer this question. The nice folks at Tesoro and your local dealer can assist you with any other technical questions that you may still have. The detector reviews in this issue of MDI are also a valuable reference for deciding which detector is best for you.



Tesoro Does It Again

By: Robert Terry

I just wanted to write this message to thank you for building some of the best detecting machines in the market today. I have several friends who go detecting on a regular basis and they use other brands. We all do pretty well; however, I do get some comments on the small Tesoro control boxes, but the comments are always ended by "Those are some great finds!" Currently, I have four detectors that I use. Three are Tesoro units and the fourth is another brand given to me as a gift, but when I go detecting old sites, I always rely on my Tejón and Eldorado. I really do believe that they are the best for relic hunting. Earlier this year, a friend and I went detecting on a site that was once a colonial plantation. After parking our cars and hiking a mile and a half, we were there. Seeing that we were searching for relics and that most of them would be iron, I mounted a widescan coil on the Tejón. After ground balancing, I made a couple of passes and I got a deep signal. Sure enough at about 8 to 10 inches, I dug up 3 square nails. There were so many iron targets that I switched to the 5.75" coil. After ground balancing again, it was back into the fray. We moved to an area where we thought the blacksmith shop might have been. I found some chunks of iron and then I got a signal that was deep. After digging down about 8 inches, I picked out an odd-shaped piece of iron and placed it in my pouch. Later that day, while we were taking a break, I got a better look at the iron. I carried a small brush for cleaning, and after lightly brushing the iron off, I found it had a hook-type shape. I thought it might be some type of latch but felt I would be better able to tell when I got home and put it in a solution of lemon juice and water with an electric current passing through the piece and solution. After cleaning the nails and the iron, I got a little surprise. The hookshaped piece was more intricately shaped than was first seen. I really couldn't tell what it was. The friend who I was detecting with had a book on colonial artifacts, and after looking through it, we found that I had found half of the bit on a bridle circa 1730 to 1760. Tesoro does it again! Some people say that you should start with the top-of-the-line models and grow into them. I am on the other side of the coin on this matter. I had not been detecting since I was young and that made for a span of about 20 years. So I started looking at the beginner/entry units. The Compadre stood out because of its simplicity. I purchased one and after getting used to it, I went to a local park. The Compadre performed flawlessly. After a few more months, I moved up to the Eldorado. I still use both of them even though I have the Tejón now. Why do I keep them? Because it makes sense to have backup units when you go relic hunting, especially if you are a long ways from home. That and I have a niece and nephew that are starting to get interested in detecting. They come over to the house sometimes and we will detect the old flower beds. So far they have found several half dollars and other change. They love it! My sister asked me if I had any idea that there were that many coins around the house, and I had to tell her that I had salted the old flower beds with the coins. Since then, I have brought my niece and nephew to different parks and they have had a great time, even if they don't find as many coins as they did at "Uncle Bob's." One day I may have to tell them why there were so many coins at the house. So thanks again for making such fine machines. I look forward to many years of using them.



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FIELD TEST by Andy Sabish

Reprinted with permission from Lost Treasure, December 2003

Jack Gifford founded Tesoro Electronics more than twenty years ago with the goal of building highquality, dependable metal detectors utilizing cutting-edge technology at prices that wouldn't strain the family budget. Jack's sons, Vince and James, have become active members of the Tesoro team and along with their staff, have continued to develop new detectors that fit Jack's original philosophy. Over the years, I along with my family have used many of the Tesoro models in all types of treasure hunting ranging from coin hunting to beach hunting, relic hunting and prospecting with a high degree of success. When James told me about the new Tejón and described some of its features, I was anxious to see if it performed as well as it sounded. Features The first thing you notice when unpacking the Tejón is its unique color scheme. Unlike the typical "Tesoro brown" found on their other models, the Tejón sports a new gray and blue look. Based on my discussions with James before receiving the detector, I knew that real enhancements were inside and was looking forward to getting it outside into its element. Tesoro's engineers expended almost two years of research & development in designing a detector that would meet the demands of coin and relic hunters around the world. The Tejón is controlled by six knobs on the faceplate and a threeposition toggle switch on the bottom


of the control housing in front of the hand grip. The knobs are labeled "Threshold," " Alt. Disc Level," "Sensitivity," "Disc Level," "VCO Tune," and "Ground Adjust." Most of these controls are selfexplanatory based on their names; however, a few deserve some additional attention. The Tejón features an easy-to-master manual ground balance control that allows for maximum diction depth in even the most adverse ground conditions. The ground balance adjustments are used in both the all-metal and discriminate modes so no matter what your preferred mode of hunting is, mineralization will not affect target detection once you have made the necessary adjustments. The ground balance cir-

a snap! The "VCO Tune" control provides users with a choice of audio response based on their personal preferences. When turned fully counterclockwise he VCO or Voltage Controlled Oscillator circuit is activated. In the All-Metal mode, both the volume and pitch of the audio response will change based on the size and depth of the detected target. Many detectorists find that this option is extremely useful in accurately pinpointing targets. If you decide that the VCO response is not for you, turning the knob clockwise will allow you to vary the pitch of the signal produced by a target in both the All-Metal & Discriminate search modes. This is a nice feature since each of us has a specific tone that we find easier to discern and the Tejón allows the ideal tone to be selected for optimum performance in the field. The Threshold control is used to set the audio level when searching in the All-Metal mode. The Sensitivity control serves multiple functions. First, it is used to adjust the gain or signal amplification of the detector. The knob is labeled with values from 1 to 10 with an additional area labeled "Max Boost." When searching under certain conditions such as areas with low mineralization, the Max Boost range will allow you to obtain increased detection depth and overall sensitivity. Like other detectors, this control should only be set as high as possible while still obtaining stable operation; i.e., no false signals or audio chattering. The three-position trigger switch is another innovative feature found on the Tejón. In the center position, the normal discrimination


cuit is one that greatly enhances the ability of the Tejón to handle the worst ground conditions; however, many detectorists cringe when they hear that a detector has manual ground balance. It is extremely easy to adjust and the instruction manual provides very clear step-by-step directions to ensure you can make the appropriate adjustment in the field. After a few practice attempts, becoming proficient at ground balancing is

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circuit is activated. Pulling the trigger towards the hand grip activates a fastretune all metal pinpoint mode. This allows you to accurately determine where the target is since the coil does not have to be in motion in order to produce a signal. Note: This is not a search mode. If you want to hunt in All Metal for maximum detection depth or to locate any metal object in the area, simply turn the discriminate control fully counterclockwise where it will click into the All Metal mode. Pushing the toggle switch to the forward position activates the Alternate Discriminate circuit. The second discriminate circuit allows you to check signals at different discrimination levels to aid in target identification. An ideal way to use these two controls is to set the primary control in the AllMeal mode and then select a level of discrimination for the type of hunting and area you are searching. When you get a signal, simply push the toggle switch forward to determine if the target is worth recovering. Weight is a feature that Tesoro has never felt necessary to build into any of their detectors. The Tejón is not exception and even with all the performance and features built into this newest model, it tips the scales at just under three pounds with the standard coil! The Tejón provides nearly 30 hours of operation from a set of eight AA alkaline batteries and rechargeables can be used with no loss of performance. The two 4-cell battery packs simply snap into the compartments under the armrest. A standard ¼" headphone jack is located on the rear of the control housing.


removed dirt and rechecked the hole, I reached the 10-inch mark before my probe touched something at the bottom edge of the hole. Carefully prying it free with my knife, I could see that it was a coin. Curiosity got the better of me so I waked down to the edge of the river and washed some dirt from the coin to avoid damaging it. The details were quite striking for an older copper coin in this part of Pennsylvania (fertilizer & mineralization usually pits their surface) and the date 1822 was clearly visible on the large cent I held in my hand. Over the next hour, I recovered several more targets in the nine- to fourteeninch depth range including two buttons, several wrought iron square nails and some items I am still trying to identify. The next site was an old foundation in the woods near my house that had not produced much in the past but dated back into the 1800s. Longview of the Tejon using the same discrimination settings as I had at the ferry ed as the river flooded its banks over landing, I started hunting near the the past 150 years. Opting to hunt in back of the old home. Signals were All Metal (Disc) and set the Alt Disc plentiful; however, by checking them circuit to check signals (set just under in the Alt. Disc. Setting, I could tell Foil), I set the Sensitivity control at 9 they were pieces of iron. Since I had and ground balanced the Tejón. Even a limited amount of time, I set the along the river, mineralization is a Disc control to FOIL and moved the problem since coal cinders have been Alt. Disc knob to just below the Tab dumped into the river for close to 200 mark. Despite the numerous iron taryears; however, the Tejón was gets that littered the area, the Tejón extremely quiet indicating the ground ran silent until a target that fell above balance circuitry was doing its job. the discrimination setting was detectAs expected, signals were few and far ed. In the area immediately surroundbetween but they were there. The first ing the foundation itself, I found that few signals produced small, unidenti- the 9"x8" coil tended to be susceptifiable pieces of copper and brass ble to "target masking" (multiple tarfrom depths up to seven inches deep. gets under the coil at the same time; A strong signal near the base of an old however, a trick that helped me pick tree caught my attention and I out several keepers was to lift the coil removed a six-inch plug. I was sur- up a few inches off the ground and prised to see that the signal was still slow my sweep speed down just a bit. in the hole considering how loud the A smaller coil would have really been audio response had been. As I slowly effective in this situation. Two hours Field Test I received the Tejón just in time to take along on a trip back to Pennsylvania over the Labor Day weekend. I wanted to see how it did in two types of areas--trashy sites and areas where targets were extremely deep. The first area I visited was the site of an old ferry landing along the shore of the Susquehanna River just north of Bloomsburg that had been in use during the mid-1800s. I had found the site a few years ago and while it did hold some old targets, they were very deep due to the amount of dirt that had been depositTESORO ELECTRONICS, INC.

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was all I could afford to spend here before my wife sent out a search party but the pouch full of relics was more than I had recovered in the previous three trips to this site. Returning to Atlanta, I took the Tejón to several Civil War sites that were well-known and considered by many to be hunted out. As a matter of fact, I ran into three relic hunters at the first site who had been searching it most of the morning, an area being cleared. After some conversation and taking a look at what they had found, we all picked up our detectors and went back to hunting. One of them had agreed to my request to check each other's signals so we began hunting parallel to each other. The first few targets were shallow and we both got clear signals from them. I received what sounded like a deeper signal (a bit fainter than the previous ones) and called Bill over to check it. Knowing where it was helped but even scrubbing the coil over the area, he only received a signal once in a while. He said he doubted he would have even picked up the signal much less deciding it was worth recovering. Hoping for a keeper, I started to dig in the hard red clay. At almost 11", a dropped .58 caliber Williams Cleaner bullet came to light. Over the next few hours, this scenario was repeated several times. Targets that the Tejón detected with clear, repeatable signals were either not detectable or produced broken, intermittent signals from two of the three other detectors being used at the site. All of us were quite impressed at the detection depth and sensitivity exhibited by the Tejón--several bullets, small percussion caps, brass fragments and a few iron artifacts wound up in my collection that day! I used the Tejón at other sites and found that the ground balance circuit handled even the most adverse conditions I came across. Small rustTESORO ELECTRONICS, INC.

ed iron, which many other detectors find impossible to ignore, was cleanly rejected with the discrimination control set just about the IRON mark. Even in areas littered with ferrous trash, the Tejón exhibited no falsing or chattering while easily picking out lead, brass and copper targets at impressive depths. Summary The name "Tejón" is Spanish for badger, which is an animal known to be tough and capable of digging deep. Tesoro seems to have selected the Tejon's name accurately for while it doesn't dig, it definitely detect deep! Some detectorists have ignored Tesoros in the past assuring themselves that the small control housing can't equate to top-notch performance; however the Tejon's in-field performance should convince even the most jaded treasure hunters that they should consider a Tesoro for their next detector. Many of the finds I made with the Tejón came from depths that very few other detectors are capable of reaching and when you combine the lightweight of the detector with this performance, it makes hours of searching an enjoyable and often extremely productive experience. Tesoro offers additional searchcoils for the Tejón including round and elliptical concentric and widescan coils ranging in size from 7" to 11" that further enhance its versatility. It should be noted, however, that only the coils from the Tesoro Lobo SuperTRAQ are interchangeable with the Tejón due to its new circuit design. The Tejón lists for $699 and comes with the legendary Tesoro lifetime warranty--something that has always told me that the company has a high degree of confidence in the quality of the equipment they build.


Great Treasures

I have been using Tesoro detectors for sometime now and have grown to really like the Golden µMax. This little machine really hunts great in the trash and heavy iron. Today, I decided to hunt a Girl Scout camp which has been closed for 20 years. It was recently turned into a county park. The camp dates back to the early 1940's and has been littered over the years with bottle caps and pulltabs and the ground is extremely mineralized with iron. I detected for almost 3 hours and managed to find a 1958 quarter and a 1952 dime. My finds also included 6 clad quarters, 6 nickels, 5 clad dimes, 1 wheat penny, a 1948 dog tag, a guardian angel medallion, and a belt buckle. Most of the coins came from depths of 6 inches with the 1958 quarter at 8 inches. I did not clean these coins for the picture as I wanted all to see the iron deposits. My brother hunts with one of those multi-frequency detectors which he paid a $1000+ for and he has hit this area hard. I had to email him a picture of my finds and to tell him that he needed to get a Tesoro! He is seriously considering it. I've detected with him many times and the Tesoros just coast through the iron with no problems for me, while he keeps playing with the adjustments on his brand X. I want to thank Tesoro for making such quality machines and for standing behind their products with the only lifetime warranty in the industry! Keep making these GREAT detectors!

Larry Kuehn Valparaiso, IN


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Treasure Hunter's Glossary

Air Test: A test performed by moving various sized metal samples beneath the metal detector searchcoil to check the detector's features and target response. This test is not an accurate indicator of ground depth penetration capability. Alkaline: A type of battery able to sustain longer periods of current drain with greater storage life when compared to the standard carbon-zinc type. All Metal: Any operating mode or control setting which allows total acceptance of any type of metal targets. Usually associated with the Ground Balance mode. Audio ID: See Tone ID. Audio Response: See Target Response. Auto Tune: Circuitry which continuously retunes the detector's threshold to the initial manually tuned audio level. The retuning rate following target rejection or drift can be preset or variable. Back Reading: A false signal, when operating in the discriminate mode, caused by a rejected target coming within one inch of or contacting the searchcoil bottom. Bench Test: An air test to determine at what approximate discriminate settings various metal samples are rejected or accepted. The test is conducted in a nonmetallic area. Black Sand: One of the most extreme components of nonconductive, negative ground minerals. Also called magnetite (Fe304) or magnetic iron oxide. Body Mount: A configuration whereby the control housing is separated from the control shaft and fastened to the operator's body lessening arm fatigue and expanding usability for shallow water hunting. Also known as hip mount. Cache: Any intentionally buried or secret hoard of valuables. Carbon-Zinc: The most common standard dry cell battery type. Coil: See Searchcoil. Coin Depth Indicator: A visual indicator used in conjunction with calibrated circuitry to indicate depth of buried coins in inches or millimeters. Concentric: A searchcoil configuration using one or more transmit and one receive windings having unequal diameters aligned on a common center; most recently arranged on the same plane and called coplanar concentric.


Conductive Salts: One of the major mineral types which make up the positive ground matrix. Wet, ocean-salt sand produces a positive rise or metallic type response on an air tuned threshold. Conductivity: The measure of a metal target's ability to allow eddy current generation on its surface. Control Housing: A metal or plastic box which holds circuit boards, indicators, meter, controls and power supply. Convertible/Combination: A metal detector configuration allowing versatility in operator handling, i.e., hand held to body mount. Coplanar: Any searchcoil configuration in which transmit and receive windings occupy the same level or plane. Crystal Controlled Oscillator: A transmit oscillator employing a crystal to maintain stable output frequency. Depth Penetration: The greatest measure of a metal detector's ability to transmit an electromagnetic field into the soil matrix and produce a target signal. Detection Pattern: The densest or strongest region of the searchcoil's electromagnetic field where detection occurs. Its shape is balloon and changes in size directly proportional to target surface area. Detuning: Adjusting the audio threshold into the null or less sensitivity tuning zone. Also a method of narrowing a target signal width manually for precise pinpointing. This is accomplished by retuning to audio threshold over the target response area. DISC: See Discrimination. Discrimination: Adjustable circuitry which ignores or nulls audio responses from a specific conductivity range allowing positive responses to be heard from metals higher in conductivity above the discriminate control setting. Designed primarily to eliminate audio response from trash metals. See also Motion Discrimi-nator. Double Blip: A signal characteristic common to elongated ferrous targets such as nails or coins lying close to the surface detected in the All Metal no-motion mode. Double-D or 2-D: See Wide Scan. Drift: A loss of threshold tuning stability caused by temperature change, battery condition, ground mineral content or detector design. Eddy Currents: Small circulating currents produced on the surface of metal by the

transmitted electromagnetic field. These currents then produce a secondary electromagnetic field which is then detected by the searchcoil receiver windings resulting in inductive imbalance between the windings. Electromagnetic Field: An invisible force extending from top and bottom of the searchcoil created by the flow of alternating oscillator frequency current around the transmit winding. See also Detection Pattern. Electronic Pinpointing: An automated detuning feature which narrows signal response for the purpose of target pinpointing. Elliptical Coil: A searchcoil with an ellipse shape. This coil can be either concentric or wide scan type. Faint Signal: A sound characteristic of targets that are sometimes deeply buried or very small in size. False Signal: An erroneous signal created by over shoot, ground voids or highly mineralized hot rocks. See also BackReading. Faraday-Shield: A metal foil wrapping of the searchcoil windings or metallically painted searchcoil housing interior for the purpose of eliminating electrostatic interference caused by wet vegetation. Ferrous: Descriptive of any iron or iron bearing material. Ferrous Oxide: An oxidized particle of iron which generally becomes nonconductive and makes up the natural negative ground mineral matrix. Hematite, which is also an iron oxide (Fe203), will respond as positive or metallic. See also Black Sand. Frequency: The number of complete alternating current cycles produced by the transmit oscillator per second. Measured in cycles per second. VLF Very Low Frequency = 3 to 30 kHz LF Low Frequency = 30 to 300 kHz MF Medium Frequency = 300 to 3000 kHz HF High Frequency = 3 to 30 MHz Frequency Shift: A feature which suppresses the audio interference (crosstalk) between two detectors using identical transmit frequencies in close proximity. Ground Balance: A state of operation using specialized circuitry to ignore the masking effect that iron ground minerals have over metal targets. Ground Balance - Factory Preset: A


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feature which eliminates the manual ground balance control and its adjustment from the operator's setup procedure. This adjustment is performed internally by the factory to optimize operation over an average range of nonconductive soils.

Meter: A detector component that provides

visual information to aid in target identification. Meters feature either an LCD or needle indicator which may display intensity of signal, target depth, target identification, type of metal, or battery condition. Mineral-Free Discriminator: Any metal detector that can reject or ignore trash metals while simultaneously balancing ground mineralization. Mineralized Ground: Any soil that contains conductive or nonconductive components. Mode: A condition of operation, selected by the operator, for specific desired function(s). Motion Discriminator: A detector type that requires searchcoil motion to activate its simultaneous ground balance and discriminate functions. See also MineralFree Discriminator and VLF/TR. Narrow Response: A target that produces an audio response so short that pinpointing is almost not needed. Negative Ground: Soil that contains nonconductive minerals which have a negative or nulling effect on an air-tuned threshold. Neutral Ground: Soil that has no nonconductive or conductive mineral properties. Lacks mineralization. Ni-Cad or Nickel-Cadmium: A rechargeable type of battery cell. Non-Ferrous: Not of iron. Metals of the precious class (i.e., gold, silver, copper, etc.) No-Motion: Refers to any mode of operation that does not require searchcoil motion to trigger target response. Also called non-motion. Notch Accept: Operation whereby all target responses are "tuned-out" except those the instrument is adjusted to accept in the notch "window." Notch Discrimination: Filtering circuitry which allows a "window" of desirable targets to be accepted within the entire rejection range of unaccepted targets, i.e., rejecting nails, foil and pulltabs while accepting nickels and gold rings of the same conductivity. This circuitry can also be adjusted to reject all metal targets while accepting only a specific conductivity range. Notch Level: A control used to select the target level or target conductivity which the notch filter will act upon. Notch Reject: Operation whereby all targets within the notch width at chosen notch level will be "tuned-out." Notch Width: A finite discrimination range of target conductivities ("window") at the chosen notch level. Null: The zone just below audible threshold in metal detector tuning. This also refers

Ground Balance - Manual Ad-justed:

A feature requiring a manual control adjustment procedure to neutralize the effects of negative minerals in the search matrix. Ground Balance - Self Adjusting: A feature which senses change in ground mineral content and continuously readjusts the ground balance while in operation. Sometimes called Ground Tracking or Automatic Ground Balance. Ground Filter: Complex circuitry found in motion-type detectors which separates mineral signal from the metal signal allowing it to be further processed by the discrimination circuitry. Hand Held: A metal detector configuration whereby the operator holds a shaft or handle which supports the searchcoil and control housing. Also called pole mount. Head: See Searchcoil. Hz or Hertz: Cycles per second. See also Frequency. Hip Mount: See Body Mount. Hot Rock: A rock which contains a higher concentration of nonconductive ground minerals than the surrounding matrix to which the detector is balanced. A metallic (positive) response will be heard in the motion and non-motion modes and a null or negative drop in threshold is heard in the all metal, ground balance mode over these rocks. Isolator: A nonmetal stem which attaches the searchcoil to the control shaft eliminating metallic interference in the detection pattern. On some detectors, the entire lower shaft is made of a nonmetal substance. kHz or Kilohertz: 1000 cycles per second. See also Frequency. LCD or Liquid Crystal Display: Used on a metal detector as a graphic visual indicator same as a meter/needle indicator. LED or Light Emitting Diode: A semiconductor which produces an illuminated visual response. Loop: See Searchcoil. Matrix: Refers to the total volume of ground penetrated by the transmitted electromagnetic field--which may contain varying amounts and combinations of minerals, metals, salts and moisture. Metal: Metallic substances such as iron, foil, nickel, aluminum, gold, brass, lead, copper, silver, etc. Metal Detectorist: A person operating a metal detector in the field. This name is preferred by many over Treasure Hunter.


to the momentary drop or quiet response of threshold sound as the searchcoil passes over a discriminated or rejected target. Overlap: The amount of searchcoil swing advance not greater than the searchcoil's physical diameter. Overshoot: A common false signal heard as the searchcoil passes over a rejected target when using a no-motion all metal mode in conjunction with automatic retuning. Excessive tuning restoration pushes the audio above threshold level creating a positive response at the edges of target detection periphery. Phase Response: The length of time between eddy current generation sustained on a metal's surface and the resultant secondary electromagnetic field effect on the searchcoil's receive winding. Related to target conductivity. Pinpointing: Finding the exact target location with respect to a searchcoil's designated center. Accomplished by interpreting the centers of audio response width in perpendicular directions or scans. See also Detuning. Positive Ground: Soil which contains conductive minerals or moist salts which have a positive or upward effect on an air-tuned threshold. PI or Pulse Induction: A mode of operation where the transmitter circuit pulses an electrical current into the ground before it quickly shuts down. The eddy currents dissipate immediately from poor conductors such as wet salt sand and ground minerals. Metals hold eddy currents because they are better conductors. When the receiver circuit comes on, it picks up the returning signal from metal; the eddy currents in the ground minerals have already disappeared. Quick Response: A short time period between metal sensing and peak audio/visual indicator indication usually associated with all frequency ranges of TR detectors. Rejection: An indication of target nonacceptance by a null in threshold or broken sound while operating in a discriminate mode. RF-Two Box: A radio frequency detector having its own transmit and receive windings separate and in an orthogonal configuration. This detector is capable of deep large object detection while naturally ignoring small targets such as nails and individual coins. Scan: Refers to 1) the effective searchcoil detection width or 2) searchcoil movement over the ground. Scrubbing: The searchcoil is pressed and held in contact with the ground while searching to maintain even audio thresh59

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old. With newer detectors, this technique is used to gain depth. Searchcoil: A circular (or other shaped) plastic housing containing single or multiple transmit and receive windings (wire coils) in a specific configuration. A searchcoil emits and receives signals from the ground and metal targets. Also called loop, coil or head. Searchcoil Cable: An electrostatically shielded cable of conductors (wires) which convey signals to and from the searchcoil and control housing. Sensitivity: The capacity of a metal detector to perceive changes in conductivity within the detection pattern. Generally, the more sensitivity a detector can smoothly provide, the more depth it will achieve in sensing targets. Signal: An audio response or visual indication alerting the operator that a target has been detected. Signal Width: The total distance of ground an audio signal is sustained during searchcoil travel or scan. Silent Search: Refers to detectors capable of producing a target signal while operating below the threshold audio. Also called silent operation. Scuff Cover: A protective cover for the searchcoil bottom. Also called coil cover or skid plate. Slow Motion: A description of searchcoil speed required to operate the motion discriminate mode. Stability: The ability of a metal detector to maintain manually adjusted tuning threshold under the effects of outside interference. See also Drift. Surface Area: Refers to the area of a target closest to the searchcoil where eddy current generation can take place. Surface Mount: The art of mounting electronic components on the surface of a printed circuit board rather than using the "through board" method. This allows more technology in a much smaller space and with much higher tolerances. Sweep: The motion employed in moving the searchcoil across the ground. Target: Refers to any object that causes an audio or visual response in a detector. Target Masking: When large sizes or high concentrations of trash metals drive the threshold into the null zone suppressing weaker, positive responses from deeper or smaller targets. Target Response: See Signal. Ten-Turn: A control which can be manually rotated ten times to cover the full electrical range of the function. Usually associated with tuning or ground balance function. Test Garden: A mapped plot of buried tar60

gets at various depths to aid in learning characteristic target responses and in comparing metal detector performances under a given ground mineral content. Also called test plot or test bed. TH'er, TH'ing: Universal word contractions for treasure hunter and treasure hunting. Also known as Metal Detectorist. Threshold: Continuous tone that establishes a reference point for tuning the detector to ground balance it. The threshold tone also establishes the minimum sound level for deep targets in the discriminate mode. Tone ID: Circuitry producing different audio tones for each target's conductivity range, i.e., low tone for nickel, high tone for coins. TR or Transmitter-Receiver: Term describing method of operation of early detectors. Some manufacturers still produce this type of detector. Electromagnetic field distortion caused by mineralized ground interferes with depth penetration as this type of detector does not ground compensate. It does balance conductive salt water effects, so it is primarily used in salt water and on low mineral salt water beaches or low mineral inland locations. Visual ID: A feature in which a visual indication is produced to help identify the target. Visual Indicator: A meter, LCD or LED that signals a target's presence. VLF or Very Low Frequency: See Frequency. VLF/DISC: Term associated with detectors capable of mineral-free operation in both the discriminate and all metal modes. VLF/TR: A class of detector that can operate in both the all metal, ground balance mode and the no-motion discriminate, non-ground balance mode. Wide Response: A target that produces an audio signal over an area wider than the searchcoil diameter. Widescan: A coplanar searchcoil with two "D" shaped transmit and receive windings positioned back to back and overlapping. This searchcoil type is capable of detecting a target across at least its full diameter. Also called Double-D or 2-D. Zero Discrimination: Used to describe detectors whose discrimination control allows the acceptance of all metals at zero setting.

1. Always check federal, state, county, and local laws before searching. It is your responsibility to "know the law." 2. Abide by all laws, ordinances, or regulations that may govern your search or the area you will be in. 3. Never trespass. Always obtain permission prior to entering private property, mineral claims, or underwater salvage leases. 4. Do not damage, deface, destroy, or vandalize any property (including ghost towns and deserted structures), and never tamper with any equipment at the site. 5. Never litter. Always pack out what you take in and remove all trash dug in your search. 6. Fill all holes, regardless how remote the location, and never dig in a way that will damage, be damaging to, or kill any vegetation. 7. Do not build fires, camp, or park in non-designated or restricted areas. 8. Leave all gates and other accesses to land as found. 9. Never contaminate wells, creeks, or any other water supplies. 10. Be courteous, considerate, and thoughtful at all times. 11. Report the discovery of any items of historic significance to the local historical society or proper authorities. 12. Uphold all finders, search, and salvage agreements. 13. Promote responsible historical research and artifact recovery and the sharing of knowledge with others.

With special acknowledgment to Western and Eastern Treasures Buyer's Guide


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Tesoro Distributors are authorized, independent warehouse and retail operations serving Tesoro dealers and consumers. If you can't find an Authorized Dealer near you, please call the Distributor of your choice and they will be glad to assist you.


NOVA SCOTIA Sweet Dreams Detectors R L Dennis Associates Pettipas The Prospector ALBERTA Touchwood Enterprises Rich's Ventures BRITISH COLUMBIA Northcoast Metal Detectors K & B Enterprises ONTARIO Candian Treasure Seekers Oshawa Metal Detectors Northshore Metal Detectors RDSI Ackert Supplies Middlesex Detector Sales Golden Treasure Metal Det. E.E. Johnson Enterprises Golden Horseshoe Detector NOVA SCOTIA J. Tech Equipment Sales MANITOBA O.K. John Metal Detectors SASKATCHEWAN All Tech Mining & Forestry Kentville Lakeside Westville Edson Rocky Mnt. Hou Terrance Westbank Corunna Enniskillen Hagersville Markham Norwich Parkhill Scarborough Shelburne Stoney Creek Londonderry Winnipeg Saskatoon 902-678-7264 902-455-2311 902-396-3509 780-723-2943 403-845-3718 250-635-5676 250-707-0618 800-965-8470 905-263-2969 905-768-7876 877-201-2343 519-424-2549 519-294-6623 416-261-1347 519-925-5274 905-643-2668 902-668-2912 866-667-6556 306-934-1666

Jobe Wholesalers

13911 Pioneer Rd. Apple Valley, CA 92307 (877) 698-8881 (760) 961-8700

Hickory Valley Det. Sales

6916 Lee Highway Chattanooga, TN 37421 (423) 892-0525

Detector Electronics Corp. Homestead Detector Co.

7515 S. Pennsylvania, Ste E Oklahoma City, OK 73159 (405) 685-3130 23B Turnpike Rd/Brickyard Plaza Southborough, MA 01772 (508) 460-6244 (800) 446-0244

Outdoor Outfitters

824 N. Hartwell Ave. Waukesha, WI 53186 (262) 542-7772 (800) 558-2020


The following Tesoro Distributors are authorized independent wholesalers who provide Tesoro products and warranty service to resellers and consumers in their country. For information on establishing a distributorship in a country not represented, please contact the Tesoro factory.

AUSTRALIA North East Metal Detectors P.O. box 5218 Wodonga Plaza Wodonga , Victoria AUSTRALIA 3690 Tel: (61) 2-6059-1666 Website: BULGARIA SOPHILCO Ltd. 1330, Sofia Blvd. Vardar, Block 65 BULGARIA Tel: (359) 2-920-0131 CANADA CANADIAN TREAS. SEEKERS 601 St.Clair Pkwy Corunna, Ontario N0N1G0 CANADA TEL: 800-965-8470 CZECH REPUBLIC Marek mlejnsky Prazaska 572 542 01 Jilove U Prahy CZECH REPUBLIC Tel: 420-604-490003 FRANCE INTERNATIONAL DETECTION SERVICES (IDS) 22 rue Charles Baudelaire 75012 Paris, FRANCE Tel: (33) 1 43 07 55 02 Fax: (33) 1 43 07 07 16 Website:


GERMANY (includes service to Austria & switzerland) ABENTEUER-SCHATZSUCHE Am Wald 11 32694 Dörentrup, GERMANY Tel: (49) 5265 955879 Fax: (49) 5265 955882 Website: GREECE BARBARA MITTA Venizelou 44 GR-54624 Thessaloniki, GREECE Tel: (30) 231 0286 577 Fax: (30) 231 0281 488 Website: HUNGARY HASZONFEM KFT. Szabo K. u. 20 4030 Debrecen HUNGARY Tel/Fax: (36)52-425-847 ITALY E.B. ELETTRONICA DI BARTOLINI & C. SNC Via del Lavoro 4 Zona Ind. Montaletto 48015 Cervia (RA), ITALY Tel. (39) 0544-965378 Fax: (39) 0544-965036 Website:

NETHERLANDS DETECT METAALDETECTORS Wooldriksweg 88 7512AV Enschede NETHERLANDS Tel: (31) 53-4300512 Fax: (31) 53-4345558 Website: PERU SERPERUANO.Com S.A.C. Calle Independencia #208 Of. 201 Miraflores Lima 18 PERU Tel: (51) 1-4452898 Fax: (51) 1-4216177 Website: POLAND DENAR-Wykrywacze Metali ul. Lipowa 6A/17 81-572 Gdynia, POLAND Tel: (48) 58-781-0889 Website: RUSSIA RODONIT P.O.Box 20 Moscow, 111394, RUSSIA Tel: (7) 95-165-9018 Fax: (7) 95-301-2514 Website:

SLOVENIA PJ Engineering, Inc. Ljublijanska 31 2310 Slovenska Bistrica SLOVENIA Tel: (386) 2-818-2858 Fax: (386) 2-818-2859 SPAIN EURODETECTION, s.l. Ctra. Canillas, 138-2º 11-B 28043 Madrid, SPAIN Tel: (34) 9 1 388 6782 Fax: (34) 9 1 759 9996 Website: TURKEY AZIM ELEKTROMEKANIK Tic. Ltd. Sti. Gazi Bulvari No:87-606 35230 Cankaya-Izmir, TURKEY Tel: (90) 232-4412756 Website: UKRAINE GEOTECH 4 Kondratuka Street Kiev, UKRAINE 04201 Tel: (380) 44-462-3149 UNITED KINGDOM (Includes Service to Ireland, Scotland) TREASURE WORLD 192 Albany Street London, NW1 4AP, ENGLAND Tel: (44) 207-387-3142 Fax: (44) 207-388-2714


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Tesoro Authorized U.S. Dealers

A next to a Dealer's name indicates a "Gold Star" Dealer who has exceeded Tesoro sales and service goals. The state in which they are listed is where they resided at the time of this MDI's printing. Though they may be on the road and visiting treasure shows, they still may be reached to help you with your Tesoro purchase or to answer questions.

ALABAMA Deep South Detectors Florence Confederate State Arsenal Birmingham Southern Skin Divers Su Birmingham Bear's Detector Sales Bridgeport Southern Tresures Tuscaloosa ALASKA Alaska Mining & Diving Anchorage Debbie's Old Coins Wasilla ARIZONA A & B Prospecting Mesa Rusty's Detectors 'n Nuggets Prescott A & B Prospecting (PV) Prescott Valley Gold Miser Quartzsite Morey Detector Sales Tucson Promack Treasure Hunter Apache Junction Black Canyon City Detectors Black Canyon City Crown King General Store Crown King Citigold Kingman Arizona Hiking Shack Phoenix Rockazona Inc. Peoria Miners Creek Wickenburg Treasures Unlimited Winslow Pro Gold Prospecting EquipmentYoungtown DeTorres Detectors Yuma ARKANSAS Treasure Cove Barling Medicine Man CB Clarksville J Wammack Sales Mena CALIFORNIA Big Valley Metal Detectors Citrus Heights Columbia Metal Detectors Escondido Gold Gulch Felton Gold Fever Prospecting Hesperia A & S Company Santa Clara Rusty's Gold & Treasure Anaheim Shasta County Gold Anderson Capricorn Enterprises Canyon Country 49ers Mining Supplies Columbia Fielding Trading Coulterville Trans Bay Metal Detectors Foster City RCM Enterprises Fresno Legends Prospecting Hemet Gold Prospecting Adventrures Jamestown Anton Enterprises Lancaster Valley Detector Sales Modesto Jack's Metal Detectoring Oxnard Rich Rego Detectors Pioneer The Miners Cache Redding Pedersen's Metal Detectors Santa Ana Dr. Looney's Tackle Stockton Ray's Metal Detectors & Prosp. Turlock COLORADO Mr. Detector Montrose Treasure Hut Centennial Dewitt Enterprises Colorado Springs Gold-n-Detectors Golden Crime Prevention Resources Grand Junction CONNECTICUT TC Metal Detecotrs Windsor Locks Snow's Metal Detectors Gaylordsville DELAWARE JB's Speciality Merchandise New Castle Treasure Quest Shoppe Ocean View FLORIDA JR's Metal Detectors Deltona Reily's Treasured Gold Inc Pompano Beach American Hardware Edgewater B & G Metal Detectors Lake City Bob Uhl metal Detector Lakeland Golden Eagle Products Melbourne BJ's Detector Sales Ocala Gold Prospecting Supply Co. Orlando Ann Arbor Metal Detectors Spring Hill


256-767-7535 205-836-0357 205-595-3052 256-495-9171 866-849-7732 800-478-3444 907-357-3643 480-832-4524 928-445-6451 928-772-4319 928-927-7150 520-323-0071 480-983-3484 623-374-9044 623-492-0600 928-692-5035 602-944-7723 623-979-7400 928-684-7014 928-289-3503 623-975-7573 928-782-2480 479-785-2466 479-754-2076 479-466-0867 916-225-9150 760-743-8516 831-335-2901 760-948-3333 408-248-1233 714-397-4615 530-378-0851 661-252-6408 209-588-1635 209-878-0820 650-346-2848 559-281-4202 951-929-1826 209-984-4653 661-948-8957 209-577-5839 805-485-4360 209-295-3315 530-410-3122 714-771-6463 209-242-1100 209-604-7870 970-252-0429 303-881-6748 719-473-0330 303-278-6622 970-257-7725 860-623-1153 860-488-5694 302-328-0946 302-537-5334 386-490-7040 800-875-6102 904-428-9784 386-755-3516 863-602-7057 321-254-5513 352-873-9953 407-595-7478 352-597-1911

Toms Fish Pond & Water Capital Coin & Diamond Myers Metal Detectors GEORGIA Bonnie Blue Metal Detectors Southern Metal Detectors Ocmulgee Pawn Trading North Georgia Relics & Detecto Stone Mountain Relics Dan's Metal Detectors Relic Recovery Detectors Brasher Enterprise Count-D-Mony Richmond Hill Pawn Shop HAWII All Island Treasure Detectors IDAHO Gerry's Metal Detectors Signs Unlimited Grunberg Scholoss' Cabinet Rosehill Coins & Jewelry Dean's Discount Emporium Conn's Wampum Hut JC's Metal Detecting Finder Keepers North Idaho Prospecting Supply ILLINOIS Windy City Detectors M's Treasure Shop Detecting the Past Steves Guns Inc. Seek the Treasure W. Allen Collectibles INDIANA Wray's Treasure Shop NW1 Detectors Mike's Metal Detectors New Concept Metal Detectors Discount Detector Sales Webb's Metal Detectors Brunck Sales McCarts' Treasure Shop IOWA Double Eagle Detector Co. DJ's Detectors KANSAS Smokey Hill Detectors Flatland Detectors KENTUCKY Twin Lakes Hunting Supplies Southview Corp. Marilyns Medical Freedom Inc. LOUISIANA Bruce Treasure Corp. Louisiana Detectors MAINE Hobby House MASSACHUSETTS Colonial Metal Detectors Corporate Security Electronis Peabody Estate Buyers J & E Enterprises Henderson Metal Detectors MARYLAND Bay Country Metal Detector MICHIGAN DM Outstanding Bargain Xchan Treasures Down Under Mandelo Corporation RJ's TV & VCR Repair Prospecting Mining Detecting Pro/Stock Detectors Northern Michigan Treasure GTC Metal Detectors

St. Augustine Tallahassee Tampa Dallas Kennesaw Macon Ringgold Stone Mountain Carrollton Fayetteville Jesup Kingsland Richmond Hill Aiea Boise Boise Sandpoint Boise Fruitland Gardem City Lewiston Nampa Silverton Chicago Cisne Downs Rock Island Witt Zion Seymour Valparaiso Georgetown Lafayette Crawfordsville Muncie Newbuck Orleans Brayton Ottumwa Ellis Wichita Leitchfield Nicholasville Pakucah Sheveport Lafayette Dover-Foxcroft Blackstone Southborough Peabody South Yarmouth Taunton Prince Fredrick Wyoming Cassopolis Chesaning Goodrich Livonia Plainwell Spruce Traverse City

904-827-9727 800-392-2646 813-237-1939 404-556-1480 770-380-9436 478-746-1066 866-364-3137 770-469-1425 770-296-8285 770-461-1044 912-530-8204 912-510-7108 912-756-2266 808-486-3602 208-345-8898 208-785-8229 208-263-7871 208-343-3220 208-452-4573 208-343-2813 208-746-6121 208-467-2666 208-556-0337 773-774-5445 618-673-2862 309-378-4218 309-788-5765 217-594-3372 847-872-0959 800-842-7916 219-766-2879 812-366-3558 866-460-9608 765-866-0320 765-282-0774 812-490-2340 812-849-4069 712-546-2410 641-777-8229 785-726-3318 316-838-5188 270-287-0152 859-885-6416 800-489-2022 318-222-2682 337-981-7084 207-564-5157 508-883-8232 800-446-0244 978-531-3393 888-412-9430 508-821-1555 301-769-4352 616-531-7571 269-445-1577 989-720-7030 810-636-7542 734-464-9815 269-685-1776 517-471-5210 231-313-5245


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MINNESOTA Mission Metal Detector Coon Rapids Metal Detectors of Minneapolis Minneapolis MISSOURI Pictures & More Brighton Clevenger Detector Sales Kansas City Metal Detectors of SWMO Springfield Central Missouri Detectros Ashland Jim Batson Hearing Service Golden City Four State Vending Joplin Parkers Metal Detectors Leasburg Mid Missouri Metal Detectors Sedalia Max's Metal Detectors West Plaines MISSISSIPPI CS Relics Glen Beste's Lawn & Patio Suppl Warren Peddler's Outdoor Power Natchez Sit-N- Bull St. Ignace MONTANA Gold Miser Libby Modern Prospector Helena Gold West Prospecting Philipburg Big Sky Metal Detectors Ronan NEBRASKA Hayneedle, Inc. Omaha Oak Creek Collectibles Cairo Quality Business Services Elkhorn T & K Metal Detector Sales Omaha NEW HAMPSHIRE Coin & Stamp Shop Manchester NEW JERSEY Gold Digger Metal Detectors Rariton De Marco Detector Sales Millville Detectors Unlimited Somerset NEW MEXICO Caudill Enterprises Albuquerque NEW YORK Upstate Metal Detectors Schenectady Frank W. Pandozzi Ent. Chittenange Reliatech Sales & Service Hamburg North East Wholesalers Oneonta Point Detectors Point Lookout NEVADA Desert Outfitters Las Vegas Reno Prospectors Supply Reno Junior's Gun & Pawn Yerington NORTH CAROLINA Barbee Detector Sales Burlington Common Cents Detectors Shallotte Eastern Treasure Hunters Apex All Around Asherville Asherville Mills Machine Co. Concord Grenade Factory Gastonia Coastline Metal Detectors Willard Diggin' Dixie Detectors Winterville NORTH DAKOTA Contact a U.S. Distributor on page61 OHIO Baringer's Metal Detectors Kidron Mark's Metal Detectors Hubbard Heights Treasure Center "1" Inc. Hubbard Gold Digger Mount Vernon OKLAHOMA Wayne's Detector Sales Oklahoma City Capital Detectors Arnett Indian Nations Detectors Broken Arrow Great Plains Detectors New Castle The Pirate's Chest Stigler Indian Nations Detectors Tulsa Tracy's Detector Sales Wagoner OREGON Blue Bucket Mining Co Bend Heather Cove Shady Cove Blue Bucket Metal Detectors Baker City K & D Detectors Clatskanie Gold Rush Trading Post Dallas Accurate Locators Metal Det Gold Hill Black Cat Mining Harrisburg Double R Detectors Irrigon Bill & Ruby's Rock 'n Ore Hous Myrtle Creek Cliff's Metal Detectors Salem


763-755-9449 800-876-8377 417-376-2159 800-999-9147 417-886-4222 573-657-6139 417-869-6638 417-483-5213 573-205-6144 660-827-1529 417-293-5724 662-415-9121 586-776-1794 601-445-0795 906-643-6672 406-293-8679 406-442-0044 406-859-7100 406-253-1678 800-958-6038 308-380-9024 402-289-3976 402-333-9389 800-499-2440 908-595-9933 856-825-6009 800-450-5287 505-857-0596 518-393-0624 315-687-9631 716-649-5400 607-287-2060 516-650-2330 702-362-7177 775-329-7553 775-463-3017 336-584-9289 910-754-6154 919-439-4165 828-242-5407 704-782-7644 704-866-7044 910-289-7583 252-378-8363

800-837-9844 937-237-0672 330-534-4482 614-206-1766 405-685-3130 580-885-7788 918-906-9912 405-387-9882 918-967-8291 918-906-9912 918-485-3595 541-318-1131 541-878-3777 541-523-7406 203-728-2094 503-623-2062 541-855-1590 541-995-5137 541-922-4547 540-863-6111 503-581-3395

Back Country Prospectors Sumpter Boulder Patch Mines Sumpter Jon Allerman Strayton Oregon Prospecting Sweet Home PENNSYLVANIA Gettysburg Electronics Gettysburg Tim's Detectors Imperial Burke's Pot o' Gold Kingston Time Capsule Metal Detectors S Quakertown Greater Pittsburg Crescent Diamondback Detectors Sales McClellandtown CR Scientific LLC Mill Hall Dream Detectors Roulette RHODE ISLAND Contact a U.S. Distributor on page 61. SOUTH CAROLINA Rebel metal Detectors Charleston Carolina Treasures Columbia Relic Hunter Supply Ridgeway Carolina Metal Detectors Greenville Hunter's Hardware Greenville Coastal Metal Detectors Myrtle Beach Andy Sabisch's Treasure HuntingRock Hill Indy Jones Trading Co. Spartanburg SOUTH DAKOTA Black Hills Jewelers Supply Rapid City TENNESSEE Hickory Valley Detector Sales Chattanooga Backwoods Detector Sales Greeneville Detector Depot Knoxville Dixie Metal Detectors Madison Metal Detectors R US Hillsboro Red Bank Swap Shop Hixson S & P Treasure Finders Kingsport Shiloch Civil War Relics Shiloh TEXAS John's Metal Detectors Blackwell Accurate Laser Metal Det Corpus Christi Texas Premium Detectors Keller American Detectors N. Richland Hills Treasure Fish Richmond Lost and Found Metal Detectors Brownwood D2 Detectors Grapevine Royal Coins Houston Liberty Equipment Sales Inc. Houston Ancient Gold Katy Old Town Metal Detectors Krum Piney Woods Metal Detectors Longview Get-R-Done Metal Detector Tyler Victoria Coin & Precious Metal Victoria VIRGINIA Sgt. Riker's Civil War Trading Ashland Aldridge Metal Detectors Richmond Dave's Detectors Broadway Lovin' Gold Prospecting Dillwyn Automotive Sounds Disputanta The Picket Post Fredericksburg Gore Grocery Gore Whitmore's Good As New Ship Kenbridge Artifact Recovery Supplies Palmyra Staunton Trains & Hobbies Straunton Land & Sea Treasure Outfitters Toano Digger Jays Detectors & Treasu Verona WASHINGTON RC Gold Prospecting Supply Bellingham Morgan Creek Outfitters Sedro-Woolley Bowen's Hideout Spokane Get `Er Dug Prospecting SupplieSpokane Valley Nugget Man's Pay Dirt Vancouver WISCONSIN Badger Metal Detectors Madison Outdoor Outfitters Waukesha Doug's Treasure Den Wisconsin Rapids Ground Vew Metal Detector Spencer WEST VIRGINIA Michael D. Vick Beckley Electronic Supply Huntington WYOMING Cheyenne Intermountain Metal Detectors Mountain View

208-739-8689 541-894-2544 503-769-1914 866-367-4061 717-334-8634 412-600-1364 570-331-0600 215-536-0796 724-457-0720 724-439-1380 570-726-4114 814-544-1441

843-763-1115 803-238-1841 803-427-5464 864-232-0794 843-525-0554 843-450-7202 803-327-1709 864-809-0652 605-343-5478 423-892-0525 423-360-1242 800-966-1109 615-860-4333 615-653-5488 423-877-6281 423-349-4474 901-689-4114 325-282-2329 361-949-9595 817-431-5891 817-498-7100 254-368-1166 325-998-4468 817-925-3212 800-97-COINS 281-987-8708 281-578-9281 940-230-7699 903-238-5715 903-593-2953 361-573-4653 804-798-6848 804-271-9523 540-896-6465 434-983-1300 804-943-6287 540-371-7703 540-858-3139 434-676-2654 804-545-3095 540-885-6750 804-457-2726 540-248-6126 360-733-5750 360-855-1620 509-534-4004 509-995-5553 360-891-8317 608-213-6622 800-558-2020 715-423-2287 715-659-5592 304-523-6443 304-523-6443 Internet only 307-871-1100


A Tale of Tesoro The Family that Prospects Together, Prospers Together.

Prospecting for treasure is a fourth-generation family passion for James and Vince Gifford, and they're justifiably proud of their "Made In America" Tesoro Electronics products. Their father, Jack, founded Tesoro in a Phoenix, AZ, garage in 1980-the result of his affinity for electronics combined with the treasure-hunting legacy handed down to him by his father and grandfather. At the turn of the 19th century when gold fever was running high, Morgan Gifford, Jack's grandfather, moved his family from their ranch in Idaho to Oregon, where he started a gold mine. Prospecting was a family affair, with Morgan's sons Aubrey and Norval (Jack's father) working in the mine together. During harvest season, though, the family's focus changed; they labored as farm hands and traveled across Idaho, Montana, North and South Dakota. It was during one of these harvest times that Norval met his future wife, Mayme. They soon married, and Norval moved his family to Arizona, where he worked for the Inspiration Mine in Miami, one of Arizona's richest copper-mining areas. Norval and Mayme had three children: Glenna, Gloria, and Jack ( who was born in Miami, AZ). After several years of mining and as his family grew, Norval relocated to Phoenix and took a job with Arizona Public Service (APS). When Jack graduated from high school, he, too, began working for APS. Before long it was clear that Jack's inherited talent for creating electronic instruments had grown-along with his love of the historic City of Prescott-into a true calling. Jack's vision for a company of his own was fulfilled in 1980, when with the help of his wife Myrna, Tesoro Electronics was founded. It took nearly a decade more before their dream of living full-time in Prescott became reality, but in 1989 the Gifford family-and Tesoro-were finally home. Just as his father and grandfather had done, Jack shared his love of the hunt for treasures with his sons James and Vince. He involved them in every aspect of the family business, and the boys couldn't have hoped for a more dedicated teacher. They learned all about the rich history of mining and prospecting, the wide variety and evolution of tools used over the years, and how radically things had changed since their great-grandfather Morgan Gifford had begun his Oregon gold mine so many years before. Jack taught James and Vince the importance of quality and meticulous attention to detail in Tesoro's manufacture of metal detection instruments, keeping them abreast of all the latest developments in technology. The boys were hooked. In 2004, Jack and Myrna were finally able to retire, knowing that the family business would now be in the capable hands of the sons who so fully embraced their twin passions: treasurehunting and Tesoro. With James and Vince at the wheel today, Tesoro-the name that means "treasure"-remains an industry leader, with an exciting array of quality metal detector, all backed by lifetime warranties, Jack and Myrna's sons continue to carry the family legacy with pride, sharing the pleasure of modern-day treasurehunting with their growing family of satisfied customers worldwide.

Lifetime Warranty

Tesoro metal detectors are manufactured in the U.S.A. by Tesoro Electronics, Inc. For 30 years now, we have backed every new detector with our exclusive Lifetime Warranty. Nothing says more about a company;s confidence in its product than its factory warranty. This is your greatest assurance of a quality built Product.

The name that means Treasure

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Your Tesoro Authorized Dealer

Tesoro Electronics, Inc.

715 White Spar Rd., Prescott, AZ 86303 (928) 771-2646 -

See your Tesoro Dealer Today or call 800-528-3352 for a catalog and dealer near you.


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