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SPRAT

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,QGH[ Topics: ¨ ATU's and Accessories. ¨ Antennas ¨ Accessories. ¨ Reviews ¨ TenTec ¨ General Modifications ¨ Heathkit ¨ Misc. Topics ¨ Morse Keys mainly Electronic ¨ Photocall ¨ Receiver Topics ¨ Transmitter Topics ¨ Transceiver Topics ¨ SPRAT Errata Database

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Author: Tony G4WIF

i - Indicates a correction in a later SPRAT

ATU's and Accessories

Title

ATU UNIT FOR THE HW7 THE ROCK -O-NATOR TAKING THE MISTERY OUT OF ATU'S SIMPLE ATU FOR QRP TRANSMITTERS ATU QRP SWR INDICATOR THREE WAY ATUi SUGGESTED ATU WATTMETER QRP Z MATCH ATU NO COST ATU BREN TX ATU TUNED BULAN ATU SENSITIVE MICROWATT METER SWITCHED ALL BANDS QRP Z MATCH BENELUX QRP CLUB ATU ANTENNA CHANGEOVER ATU FOR THE FOXX TRANSEIVER 3 WATTS OUTPUT METER QRP POWER METER FOR THE HF BANDS WELZ POWER METER A RESISTIVE BRIDGE 50 MHZ REFLECTOMETER/ATU ONER AERIAL CHANGEOVER UNIT A RELATIVE S METER AND POWER METER SENSITIVE FIELD STRENGTH METER A BI-DIRECTIONAL INLINE WATTMETER A BATTERY AND SWR INDICATOR WITH A DUO-L A QRP DUMMY LOAD IN SMD A.T.U. FOR NOVICE A REAL QRPp VSWR METER FURTHER NOTES ON THE QRPp VSWR METER NO COST ATU MKII THE SUPER TEE ANTENNA TUNER HF SINGLE COIL `Z' MATCH ATU YALATU (YET ANOTHER L ATU) A ONE KNOB ATU & SWR BRIDGE ALTERNATIVE CORES FOR THE STOCKTON WATTMETER A QRP ANTENNA TUNER THE G4RGN "ZZ" A.T.U. ANOTHER Z MATCH AN IMPROVED ROCK-O-NATOR ATU LIPSTICK NO COST ATU A VERSATILE PEAK OUTPUT POWER UNIT THE ONER STOCKTON WATTMETER SIMPLE LED SWR BRIDGE A CLASSIC Z MATCH ATU IMPROVED MINI-ATU

Author

KEITH SIMPSON C.ROCKEY GUS TAYLOR HA-JO BRANDT JOHN WHITE GEORGE DOBBS RON HOWE DAVE DABINETT GEORGE BURT GEORGE BURT TONY HAAS COLIN TURNER ALAN CHESTER WES HEYWARD FRANK LEE GUNTER DENGLER DONALD YOUNGER D.PLUMBRIDGE IAN BRAITHWAITE BYRON C WEAVER BRIAN IAN KEYSER BILL BARTLETT DAVID STOCKTON MATHEUS VOLKERT BILL MOONEY DAVE GOSLING HA_JO BRANDT HA-JO BRANDT GUSTAV MICHALIK D.A. MICHAEL PETER LINSLEY PETER BRODRIBB NIGEL GOLDSTRAW MIKE CZUHAJEWSKI ERNEST M HELTON DOUG GIBSON ROBERT VAN DER ZAAL CHAS BRYANT ALAN GRAY A.W.McNEIL DICK PASCOE JOHN YOUNG GEORGE DOBBS HA-JO BRANDT

Callsign

G4DQF W9SCH G8PG DJ1ZB G4BCY G3RJV G3PLB G4DEP GM3OXX GM3OXX G4LDY G3VTT G3CCB W7ZOI G3YCC DL1HS W2JEK G3KMG G4COL WU2J G3SYN G3ROO G4KIH G4VSO G4ZNQ DF4SQ G3VZU GØNEZ DJ1ZB DJ1ZB DL6FBQ W3TS G3PDL GØDTQ WA8MCQ W8MVN G4RGN PA3BHK GW3SB G4UEC G3FCK G0BPS G0WQR G3RJV DJ1ZB

Sprat

2 3 6 7 10 12 12 18 22 25 28 32 33 38 38 40 41 45 47 48 50 51 54 56 57 58 61 63 65 68 69 71 71 72 76 76 77 77 78 78 86 88 89 90 91 93 94 94

Page

12 16 9 4 8 11 6 14 13 14 5 6 3 3 5 9 17 8 13 18 5 23 27 3 8 5 12 26 12 33 7 15 10 8 17 21 10 11 17 9 14 15 8 8 18 15 14 25

A BALUN FOR THE LDG AUTOMATIC TUNER A KISS HF OSCILLATOR FOR TEST APPLICATIONS A QUIET TUNER [BASED ON THE STOCKTON BRIDGE] IMPROVED MINI-ATU LDG TUNER BALUN UPDATE A HIGHLY SENSITIVE ABSORBTION WAVE METER THE LARKHALL - 3.5 TO 50 MHZ ANTENNA COUPLER A COMPACT DIRECTIONAL COUPLER FOR THE QUIET TUNER A PRACTICAL Z-MATCH ATU BALANCED ATU MOD GETTING TO GRIPS WITH YOUR FIRST EVER LONG WIRE ATU COILS "TO SHORT OR NOT TO SHORT"? LOW PROFILE 160M ANTENNA 5/8th GP ANTENNAS FOR 20,15,10 & 6 METRES HOME BREW LADDERLINE THE TRUE STORY OF LIMPY ARNOLD FUN ON `LONG WAVE' ­ BUT IS IT QRP? THE GIBRALTAR SPECIAL AN EFFECTIVE L-TYPE ATU i TOP BAND ANTENNA WITH REMOTE ATU ANTENNA CHANGE OVER CIRCUIT MULTIBAND LOFT ANTENNA FOR 40/20/15/17/10 SOME TOP BAND IDEAS 20M QRP ANTENNA TUNER UNIT & 20M MINI LOADED DIPOLE THE RE-PETE TUNER THE CARLTON PORTABLE ANTENNA MATCHING UNIT DIGITAL SWR DISPLAY FOR POWER METERS A TUNABLE BANDPASS FILTER FOR ALL BANDS

P.F.LINSEY A.W.McNEIL TONY LYMER HA-JO BRANDT FRANK BRUMBAUGH AAA TECHNICAL STAFF TOM SORBIE TONY LYMER BEAR HORN TOM SORBIE AAA TECHNICAL STAFF AAA TECHNICAL STAFF TERRY YOUNG STEVE ORTMAYER SEAB LYON GEERT STEVE RAWLINGS G. SMITH JESPER FOGH BANG JESPER FOGH BANG ALAN UPTON STEVE NICHOLS PAT SMITH GUIDO FRED BONAVISTA STEVE RAWLINGS ALAN ROWE TASA SINISA

G3PDL G3FCK GM0DHD DJ1ZB W4LJD GM3MXN GM0DHD LA4KG GM3MXN

96 96 97 97 97 98 99 100 102 103 104

19 20 12 11 7 30 30 15 18 26 28 30 27 33 7 11 18 28 18 17 19 9 11 15 26 3 9 16

K4KJP G4RAW AA1MY G/PE3GRT/MM GW4ALG ZB2GS OZ1XB OZ1XB G3UZU G0KYA GW0VMR IK2BCP K5QLF GW4ALG M0PUB YU1LM

104 106 106 107 107 107 107 108 109 110 111 111 111 111 114 114 115

Accessories

Title

LOW POWER SWR INDICATOR PRODUCT DETECTOR FOR QRP USEi VFO NETTING CIRCUIT CMOS FILTER POWER PACK FOR QRP WORK ACTIVE FILTER CHEAP CW FILTER QRP POWER PACK PIN DIODE ATTENUATOR PORTATEST FOR /P WORK SIMPLE SPEECH PROCESSOR SIMPLE TRANSISTOR TESTER MORE AUDIO FILTERS MAX BOX ­ SURPLUS CRYSTAL CHECKER CRYSTAL CALIBRATOR 7 MHZ CRYSTAL BENDER ODD FREQUANCY XTAL CALIBTATOR ACTIVE AUDIO FILTER

Author

GEORGE DOBBS EDGAR JANES GORDON BENNET GERRY FARRANCE GEORGE BURT GEORGE BURT DES VANCE DUG WOODFORD IAN KEYSER GUS TAYLOR M.SALMON L.IVIN DES VANCE MAC McNEIL DAVE POWELL MIKE PRIOR COP MACDONALD HAROLD SMITH

Callsign

G3RJV G2FWA G3DNF G3KPT GM3OXX GM3OXX GI3XZM G8IB G3ROO G8PG G2CKM G5IC GI3XZM G3FCK G3ZXK G3XMI VE1BFL G3IVF

Sprat

1 1 1 5 6 10 10 11 12 12 12 14 15 17 20 21 21 23

Page

7 3 6 13 5 3 17 5 13 13 6 3 5 13 13 13 7 15

GDO 20m DX SKED KEEPER CRYSTAL AND FREQUENCY CHECKER HIGH PERFORMANCE CW FILTER HIGH IMPEDENCE DC VOLTMETER CW CRYSTAL FILTER PEAK READING RF PROBE HELPING HAND ROCK'S TEST BOXi SIMPLE SQUEEZE KEYER HOOK ON SNIFFER A LINEAR SCALE CAPACITANCE METER ANTENNA RF CURRENT TRANSFORMER HF BANDS CONVERTER FILTER PIN DIODE ATTENUATOR SUPER PORTABLE KEYER PADDLE TOP BAND CONVERTER UNIVERSAL SIDETONE MODIFICATION REGENERATIVE AUDIO FILTER THE ONER V.F.O. THE VFG SIDEKICK KEYER A TEETER-TOOTER LO FOR DC TRANSCEIVERS AUTOMATIC T/R SWITCH BFO OSCILLATOR USING A MECH/CERAM FILTER ONE STACK C.W. FILTER 100 KHZ CALIBRATOR AF & CLIPPER FOR THE 10 TEC ARGOSY II SIMPLE SIDETONE STANDARD CAPACITOR 7 ELEMENT L,P,FILTERS 75 OHM ATTENUATOR FOR 50 OHM A VERSATILE VXO HOME BREW DOIDE MIXERS TOWARD A MORE LINEAR DIODE TUNING 74HC4066, A NOVEL LOW COST MIXER C.W. AUDIO FREQUENCY SHIFTER CRYSTAL CALIBRATOR HI Z MIC ADAPTOR A TTL LOGIC PROBE C.W. FILTER G FILTERS THE BEST AUDIO FREQUANCY 4 SW RECEPTION A POCKET BFO/CIO USING SMD THE G5IC THRESHOLD GATE NOISE LIMITER THE ONE FOR ALL BATTERY TWO TONE OSCILLATOR A 7TH ORDER LOW PASS FILTER UNIVERSAL PSU A CHEAP VFO SOURCE FOLLOWER AUDIO PREAMP AND PASSIVE FILTER 4 NE602 SIMPLE ONE-TOROID AF FILTER THE DISCO DISPLAY THE HUFF AND PUFF RE-VISITED AN OSC IND FOR REGENERATIVE RECEIVERS COIT AUDIO AMP CRYSTAL CHECKER QSK IDEAS SIMPLE ZENER TESTER WATCH IT-HUFF&PUFF REVISITED (PART 2) A LOW DRIFT, LOW DISTRIBUTION VFO

IAN KEYSER DAVE SMITH CHRIS WARWICK ED WETHERHOLD BRIAN BOOTH ADRIAN KING REG LYDDON WALTER FARRAR C.ROCKEY MATT VOLKERT RONNIE MARSHALL DOUG GIBSON KEN MAXTED IAN BRAITHWAITE BILL WRIGHT BRUCE PRIOR C.A. ROCKEY WALT LEGAN DEREK MONDAY IAN KEYSER DOUG DEMAW MIKE KING JOHN BEECH ED WETHERHOLD BRIAN GIBBS BILL WRIGHT PAUL HARRISON ED WETHERHOLD GERALD STANCEY FRANK LEE ROBERT V D ZAL GEORGE W. ALLEN Carter, Bob C.D. HAWKINS MIKE MICHAELS KEN BUCK Brandt, Ha-Jo ROY LEWALLEN GERD GUS TAYLOR KEN CRAVEN IAN KEYSER DAVID STOCKTON MIKE KING RONNIE MARSHALL STEF NIEWIADOMSKI JOHN T COLLINS A.W. McNEIL STEF MIEWIADOMSKI RODNEY SEYMOUR MIKE KING MARTYN LINDARS BILL LEASK MARTYN LINDARS BASTIAN EDELMAN JOHN R HEY

G3ROO G4JIM G8DSO W3NQN G3SYC G4ETJ G3ESP W9SCH DF4SQ GM4JJG G4RGN GM4JMU G4COL GOFAH VE7CKF W9SCH KA4KXX G3HKD G3ROO G4VFG W1FB G3MY G8SEQ W3NQN G3MBN GØFAH G4VAM W3NQN G3MCK G3YCC PA3BHK NIBEP DJ1ZB G4VSO GØCEU W3TS DJ1ZB W7EL DJ4SB G8PG G4LKP G3ROO GM4ZNX G3MY GM4JJG KN1H G3FCK G1TNE G3MY G4CEO PA3FFZ G3TDZ

24 26 29 32 39 45 46 48 48 48 51 52 52 52 52 52 52 52 53 53 53 54 54 54 54 55 55 55 55 56 56 56 56 57 57 57 57 58 58 58 58 59 59 59 59 62 62 63 63 63 63 63 64 64 64 64 64 64 65

14 7 10 3 3 3 7 22 11 8 5 12 10 7 8 13 23 15 9 4 10 19 15 26 20 13 14 12 13 8 7 11 12 18 14 28 18 6 7 14 7 13 14 21 9 14 9 18 4 11 12 20 25 18 8 16 19 13 3

CW TRANSMITTER TESTER STEF MIEWIADOMSKI HUFF AND PUFF REVISITED (3) BASTIAN EDELMAN ROLLER COASTER TURNS INDICATOR STEPHEN PUTMAN A SIMPLE GDO COIL COUPLER Marshall, Ronnie CW FILTER REVISITED Edelman, Bastian G4ERA AUDIO CW FILTER NEAPOLITAN SMD VFO KIT George DobbS 24 VOLT RELAYS ON 12 VOLTS JOHN HALIBURTON G FILTERS A PRACTICAL LOOK FRANK LEE THE FREQUENCY ADAM KEN RUIZ A WIDE RANGE 80MTR VFO HA-JO BRANDT SIMPLE CW FILTER PETER BRODRIBB SIMPLE LINEAR PA FOR 160-10M LEN DIXON A FET VOLTMETER KEN BUCK IMPROVED RF SNIFFER RONNIE MARSHALL S METER DRIVER DEREK MONEY A SIMPLE RF DETECTOR ANDY STAFFORD INDUCTANCE METER DOUGLAS GIBSON WIDE RANGE VXOs for 80 40 20m and 10 ANGEL GERASIMOV A SIMPLE FREQUENCY COUNTER FOR DC RCVRS GRAHAM ADCOCK JAW-TYPE CURRENT PROBE Ha-Jo BRANDT 5 WATT LINEAR AMPS FOR THE WHITE ROSE JOHN R. HEY A CHEAP OSCILLATOR IDEA DERRICK PRICE A PCB PAD CUTTER ROY DEANE A SIMPLE CHANGEOVER SYSTEM FOR NOVICE DAVID GOSLING USE A SIMPLE SOLDERING AID PETER BRODRIBB Q-METER OR SIMPLE COIL MEASURING CIRCUIT JAN-MARTIN NOEDING SUPERIOR 7mhz CONVERTER FOR THE WHITE ROSE THE PUFFER WALTER FARRAR A SIMPLE SPEECH PRE-AMP AND CLIPPER ROD CRADDOCK A STABLE RELAY SWITCHED VFO FRANK LEE COIL WINDING AID ROY SMITH REDUCING ICOM RIGS TO QRP POWER FRED BONAVITA SIMPLEST DIAL AND DRIVE LEN SOLAR PANEL AND BATTERY MONITOR JOHN PEARS WHITE ROSE DIGITAL DISPLAY JOHN R HEY A 10.7MHz SSB GENERATOR DEREK PEARSON A DSB GENERATOR USING THE NE602 GRAHAM ADCOCK DUAL BAND XL MIXER FOR THE CHERITON GRAHAM ADCOCK TRANSCEIVER FREQUENCY COUNTER USING THE 7224 CHIP JOHNNY APELL THE TOKY VFO KEN BUCK UB40 JIG - POORMAN'S SOLDERING AID PETER McBEATH 40m FIXED CAPACITOR XO SWITCHING MAC McNEIL 7 BAND MIXER VFO IAN BROWN QUICK DUMMY LOAD ALBERT HEYES SIMPLE AUDIO COMPRESSOR RICHARD STOYLE SIMPLE HEADPHONE ADAPTOR FOR USE OF `HI FI' DAVID GOSLING PHONES THE TOM PSU KEN RUIZ UNIVERSAL SEMI-QSK & SIDETONE BOARD JOHN EVERINGHAM VERSATILE AMPLIFIER FRANK LEE VLFB SEQUENCE CW GENERATOR JOSÉ DE TORO A 50 MHZ EXCITER PETER BRODRIBB A NO COST AUTOMATIC ATTENUATOR FOR DAVE EVANS TS120V A SIMPLE CRYSTAL TESTER ( 100KHZ - 20MHZ ) JOHNNY APELL ALTERNATIVE CORES FOR THE STOCKTON MIKE CZUHAJEWSKI WATTMETER ANALOGUE SOLID STATE SPEECH RECORDER PAUL LOVELL

PA3FFZ N8ZR GM4JJG PA0FFZ G3RJV GM4AQO G3YCC G4SGF DJ1ZB G3ONL G3XXQ GM4JJG G3HKD G4VPM G4RGN LZ1SM G4EUK DL1ZB G3TDZ G3LYU G4FQQ GØNEZ GØONL LA8AK G3ESP GW4SLK G3YCC GØIWU W5QJM G3XXQ GØFSP G3TDZ G3ZOM G4EUK G4EUK SM7UCZ

65 65 65 66 66 66 66 68 68 68 70 70 70 71 71 71 72 72 72 73 73 74 74 74 74 74 74 74 74 75 75 75 75 75 75 75 76 76 76 76 76 76 77 77 77 77 77 77 77 77 77 78 78 78 78 78

18 26 11 12 19 26 16 24 31 8 16 11 7 20 16 10 13 6 26 10 17 4 16 21 10 19 16 3 12 25 16 25 24 19 17 3 24 9 4 12 15 20 16 3 25 17 34 7 19 17 15 7 10 9 10 3

G3FCK G3TLH G3ZHE GØNEZ G4SGF G4TRN G3YCC F1NTT G3ONL G4YND SM7UCZ WA8MCQ G3YMP

AUDIO PREAMP AND AUTOMATIC LEVEL CONTROL CERAMIC RESONATOR VARIABLE OSCILLATOR SIMPLIFIED TEETER-TOOTER VXO FOR RIT A SIMPLE AUDIO "S METER" ANTI HISS IDEAS FOR LM386 AUDIO AMPLIFIERS CONTROLLED CHARGE SYSTEM FOR NICAD CELLS A SIMPLE HELIPOT SUBSTITUTE INTERNAL EXTERNAL PTT SOCKET TRANSMIT RECEIVE CHANGEOVER SWITCH KK7B SPRAT TECH CARTOON #1 LO PHASE SHIFT NETWORK THE B.L.T. LINEAR AMPLIFIER W3NQN SEVEN ELEMENT LOWPASS FILTER A 5 WATT AMPLIFIER FOR THE EPIPHYTE A VFO FOR THE EPIPHYTE QRP QSK CIRCUIT A DIGITAL DISPLAY FOR THE EPIPHYTE A LOW BUDGET HIGH PERFORMANCE CW AUDIO FILTER A POWER ATTENUATOR FOR HF USE LAKE AF2 AUDIO FILTER SIMPLE MODS FOR THE KANGA FREQUENCY COUNTER TOROIDS FOR THE GM4JJG RF SNIFFER A NICAD CHARGER FROM THE CAR BATTERY AN RIT CIRCUIT BITE FOR THE QRP SPIRIT BNC TO PL259 ADAPTER CLASS A BROADBAND AMPLIFIER FLEXIBLE IMPEDENCE MATCHING FOR W3NQN AUDIO FILTERS HIGH EFFICIENCY REVERSE POLARITY PROTECTOR DIRECT CONVERSION SIDETONE ELECTRET MICROPHONE AND VOGAD UNIT HARMONIC OSCILLATORS WITHOUT INDUCTORS HF PRESELECTOR RF DECIBEL METER FLOAT CHARGED BATTERY AS A POWER SUPPLY NOVEL CRYSTAL GRINDING MONITOR TWO SIMPLE HF CRYSTAL OSCILLATORS TETRODE/PENTODE RESONANCE MONITOR A SPECTRUM WAVEMETERi MINI CRYSTAL CHECKER / XCO QUICK POWER SUPPLY 73 KHZ OSCILLATOR AN ACTIVE LOOP ANTENNA FOR 73KHZ AN IMPROVED LF BALANCED MIXER HOW TO LOSE YOUR MEMORY LEMON JUICE SIDETONE DESTROY SUBHARMONIC RESONANCES IN TRANSISTOR PA PARRALLEL SMALL-SIGNAL BJTs FOR MORE POWER RF SNIFFER A HIGH STABILITY OSCILLATOR UNIT AN ADD-ON AUDIO TAILORING CIRCUIT DISCONTINUOUS DIRECTIONAL RING RADIATOR ANTENNAS MORSE OSCILLATOR BEAT FREQUENCY OSCILLATOR IN SARDINE CAN

DICK PATTINSON REV SUTER MIKE CZUHAJEWSKI MARCO ELEUTERI DAVE REDFERN RUDI WOLF JOHN YOUNG JOHN BEECH JOHN BEECH RICK CAMPBELL BYRON C WEAVER DERRY SPITTLE DOUG HENDRICKS JOHN BEECH DERRY SPITTLE ROELOF BAKKER DAVE PENNY FRANK GREENOUGH FRANK GREENOUGH C W HARLOW NORMAN BONNETT TONY LANGTON GUIDO GIANNI ROBERT VAN ZAAL MARCO ELEUTERI DAVE PENNY LAURENCE FLETCHER DEREK MONEY WALTER FARRAR ANGEL GERASIMOV STEVE ORTMAYER PHIL STEVENS MICHAEL COVINGTON JIM MARCO ELEUTERI DUNCAN CADD TONY FISHPOOL A.W. MCNEILL STEVE ORTMAYER BERT KRUYSWIJK JOHN HEY REG MOORES LES JACKSON Ha-Jo BRANDT DOUG DEMAW STEVE ORTMAYER RAY LOVELAND KIMON NICOLAIDES COLEN HARLOW STEVE ORTMAYER STEVE ORTMAYER

VE7GC VK6SA WA8MCQ IKØVSV N4ELM DL2RM G7BCJ G8SEQ/VK2XY

G8SEQ/VK2XYD

KK7B WU2J VE7QK K16DS G8SEQ VE7QK PAØRDT G3PEN G4EHY G4EHY

78 78 78 79 79 79 80 80 80 81 81 81 82 82 82 83 83 83 83 83 83 84 84 84 84 84 84 84 85 85 85 85 85 86 86 86 87 87 89 89 90 90 90 90 90 91 91 91 92 92 92 92 94

15 16 11 22 23 22 19 37 37 20 18 35 18 21 37 22 20 11 18 18 18 15 3 16 14 26 25 9 17 16 10 36 3 22 16 17 15 17 3 34 35 3 22 25 12 6 25 34 19 27 36 35 34

DL6NEE GM4HTU HB9BQB PA3BHK IKØVSV G3PEN G4SXH G3HKD G3ESP LZ1SM G4RAW G3SES N4TMI NØOCT IKØVSV GØUTY G4WIF G3FCK G4RAW PA3FSC G3TDZ G3GZT G4GLJ/G4HZJ DJ1ZB W1FB G4RAW G2ARU G4WQX G8BTK G4RAW G4RAW

THE PEG-LEG GRIPPER A SIMPLE TUNE-UP AID A STEREO AUDIO FILTER THE GADGET [3.5 - 18MHZ] DSB/CW MODULE WIDE RANGE CRYSTAL CONTROL ON 80M MORE STEREO CW FILTER IDEAS STEREO EFFECT FILTER SUPER WIDE RANGE VXO 34.575 HZ CRYSTAL FILTER FOR SSB DDS3 - 40MHZ DIRECT DIGITAL SYNTHESISER A SIMPLE EASY BUILD BROADBAND AMPLIFIER THE DL-QRP-PA [9W ON A 1 INCH BOARD] A 1KHZ PASSIVE AUDIO FILTER A VXO FOR 136KHZ A SIMPLE RF SOURCE WEEKEND PROJECTS FOR QRPERS CHANGE OVER CIRCUIT AN INDUCTANCE METER THE ONE CORK PIN-OUT CHECKER THE CHEAPEST SIDETONE MAKING SMALL BOXES FROM TINPLATE A MICROPHONE TIP PEG GRIPPER & TESTER NO COST FIELD STRENGTH METER MISERS ANTENNA ANALYSER A 0 - 15 dB ATTENUATOR A MODERN THERMOCOUPLE AMMETER NICAD CHARGER EASYDIP THE TUNING WAND MORSE OSCILLATOR LED RF TEST PROBE AN ISLAND PUNCH SIMPLE NiMH CHARGER THE FIVE MINUTE TOUCH TUNE FOR FT817 MICROCONTROLLER FT817 TUNING ASSISTANCE LED RF TEST PROBE ­ TIP A SIMPLE L/C BRIDGE COMPARATIVE DEVIATION METER LAMBDA OSCILLATOR AS A SIMPLE SUBSTITUTE FOR A DIP METER. i A VERSATILE TEST OSCILLATOR QRP ZERO BEAT INDICATOR FOR THE ELECRAFT K2 (AND OTHER TRANSCEIVERS) i LOW PASS FILTER FOR 5MHz BAND TRANSMITTER AN UGLY CONSTRUCTION WORKBENCH NOTES ON THE SM3CLA RF CW MONITOR 12BH7A SINGLE PUSH PULL AUDIO AMPLIFIER VARIABLE POWER SUPLLY FOR KENWOOD TS430S THE QRP+ COMPANION USING ELECTRIC LAMPS AS RF INDICATORS TWO SMALL TIPS FOR SPRAT READERS TWIN QRP RF METER

KEN CRAVEN JACK HOLSTEAD H.C. SPENCER JOHN SEAGAR WALTER FARRAR H.C. SPENCER MIKE HAUGRUND FRANCO AMBRI JAN VERDUYN MICK HODGES MARCO ELEUTERI PETER ZENKER HA-JO BRANDT IAN BROWN JIM BRETT GEORGE DOBBS STEVE ORTMAYER GORDEN POPE DR. KEN CRAVEN ERIC VAN BREE RONNIE MARSHALL NEIL MACKINNON KEN CRAVEN JOHN GARDNER GERALD STANCEY MALCOLM EALES DAVID A.REID STEVE ORTMAYER HARRY FROGATT BILL COOPER STEVE ORTMAYER GEORGE BURT WYNN HIRST FRASER ROBERTSON PAUL WEBB PAUL WEBB MEL DAVID PORTER RODNEY BOZIDAR PASARIC IVOR BOLTON SVERRE HOLM TONY LYMER STEVE RAWLINGS HA-JO BRANT HEHIKO KOMACHI KEN GREENOUGH ROY WALKER GUS TAYLOR GEORGE WOODWORTH JIMMY BOLTON

G4LKP G3OZC G6NA G0UCP G3ESP G6NA DF2OK I4AFQ G0BBL G4OPE IK0VSV DL2FI DJ1ZB G3TLH G0TFP G3RJV G4RAW G3ASV G4LKP PA9EVB GM4JJG G4WAZ G4LPK GW4KVI G3MCK M0AJL

PA3HBB/G0BZF

G4RAW G3SOX G4CIA G4RAW GM3OXX G3YXK G4BJM M0BMN M0BMN G0GQX G0UTF G7OLE 9A2HL G3JES LA3ZA GM0DHD GW4ALG DJ1ZB JA9MAT G0WBM G0TAK G8PG GW4ZAG G3HBN

94 95 95 95 95 96 96 96 97 97 98 98 99 99 100 100 101 102 102 102 102 103 103 103 103 104 104 104 105 106 107 108 108 108 109 109 109 110 110 111 111 111 113 115 115 117 117 117 117 117 119

13 24 13 11 9 15 15 11 7 21 3 12 35 8 14 4 35 12 13 15 20 7 14 26 8 12 25 35 11 14 33 9 10 23 12 13 28 3 34 4 10 17 8 8 11 20 21 22 28 31 11

Antenna Topics

Title

IMPROVING SHORT LF ANTENNAS LOOP AND LEG ANTENNA PORTABLE WHIP ANTENNA ZL SPECIAL QRP VERTICAL ANTENNA MINI LOOP 20m ASYMETRICAL ANTENNA RHOMBIQUAD (ANTENNA) DOUBLE D BEAM HB9CV 2 ELEMENT BEAM DOUBLE INVERTED VEE RIZZOU ANTENNAS CAPACITIVE TUNING FOR LOOP ANTENNAS SLOPER SYSTEM KITE ANTENNA PHASED VERTICLES FOR 15 AND 20m FEEDING THE WHIP MORE ON THE DOUBLE D BEAM SLED KITE ANTENNA 15m MONOBAND YAGI 3 BAND MINI GROUND PLANE SKELETON CONE ANTENNA 15m HELICAL ANTENNA SCOTSMAN'S 3 BANDS ANTENNA SPIDER QUAD HORIZONTAL BEAMS MORE IDEAS ON SHORTENED DIPOLES 3 BAND V BEAM 40m TOP LOADED VERTICAL BOBTAIL CURTAIN END FED BRUCE ARRAY MULTI-BAND DELTA LOOP SKELETON CONE REVISITED SLOPER THAT NEEDS NO TUNING TOAST RACK ANTENNA MAGNETIC DELTA LOOP ANTENNA 10m J POLE ANTENNA SCHH.... QUIET 30m ANTENNA FURTHER EVOLUTION OF THE DOUBLE D ANTENNA i A Z MATCH UNIT HULA HOOP ANTENNA MEASUREMENT OF ANTENNA IMPEDANCE REDUCING NOISE ON 3.5 MHZ 14 MHZ MOBILE ROOFRACK ANTENNA A SMALL GARDEN AERIEL AN ALTERNATIVE PORTABLE ANTENNA AN OMEGA MATCHED 14 MHZ MOBILE VERTICAL THE 'HOVER' LOOP ANTENNA CHEAP DIPOLE CENTRE PEICE

Author

GUS TAYLOR GORDON BENNET G.WHEELER GUS TAYLOR RALPH BURCH PETER DOUDERA F.HANDSCOMBE IAN KEYSER PETER DODD PETER DOUDERA TIM COOK ANDY HA-JO BRANDT CHRIS PAGE ROY ROWNTREE JOHN HACKET CHAS BRYANT PETER DODD ROY ROWNTREE FRANK LEE STAN WALKER BOB SPIDEL BEN JOHANSSON TOM SORBIE BOB SPIDELL BRICE ANDERSON BEN JOHENSSON JOHN HACKET BRICE ANDERSON JIM FITTON GORDON BENNET P.SWARBRIDK BOB SPIDELL JERRY BARTACHEK STEWART CAMERON UDO VELTEN IAN KEYSER WD LAPPI PETER DODD DAVID JACKSON JOHN MCDONNELL G3LDO IAN GM4HBG GUS PETER DODD BILL BARTLETT WES HEYWARD PETER DODD MIKE KING WALTAR FARRAR

Callsign

G8PG G3DNF G3ZOF G8PG W8LCU OK1DKW G4BWP G3ROO G3LDO OK1DKW G5DEH WB2RZU DJ1ZB G4BUE G3ZQA LA2QAA GW3SB G3LDO G3ZQA G3YCC G3MPW W6SKQ CT4CH GM3MXN W6SKQ W9PNE CT4CH LA2QAA W9PNE W1FMR G3DNF G3ZGN W6SKQ KDOCA GM4UTP DL1HCU G3ROO WD4LOO G3LDO G4BYY G3DOP G3TML G8PG G3LDO G4KIH W7ZOI G3LDO G3MY G3ESP

Sprat

2 8 17 19 20 21 22 22 23 23 24 24 25 25 27 28 30 30 30 31 31 34 36 37 37 38 38 39 40 40 41 41 43 44 45 46 47 47 49 50 50 50 50 51 52 52 52 54 55

Page

5 9 15 15 17 8 14 10 10 14 12 11 8 3 8 13 8 10 5 7 4 16 10 13 14 6 14 15 9 10 4 18 20 20 18 17 19 8 14 13 16 22 27 20 19 13 22 18 7

TWO METRE CAR ANTENNA SWITCHED MULTI DIPOLES PILLBOX SPECIAL QRP MINI A.T.U. YET ANOTHER DOUBLE-D BEAM ANTENNA DESIGN THEME AND VARIATIONS ON TWO WIRES CLASSIC ANTENNA TUNER THE DJ4GA DISCONE ANTENNA ON 28MC/S SHORT LOADED DIPOLES PROGRAM THE ROCKLOOP FOR THE 15,20,30 METER BNDS MAGNETIC LOOP ANTENNA FOLAWAY LOOP ANTENNA SUITCASE MAGNETIC LOOP FOR 40 - 20m 10 FOOT LONG ANTENNA A TWO ELEMENT 50 MHZ BEAM MINI T-PEICE FOR DIPOLES ROLLER COASTER TURNS INDICATOR THE FD4 WINDOM THE G3HQR 9-BAND HYBRID LOOP ANTENNA FOR 7 HF BANDS HYBRID PHASER A 7 MHZ MAG LOOP UP AND OUTER W5HKA ANTENNA NOTE SHORT LINEAR LOADED HF ANTENNA SPACERS FROM BINDERS A FOUR BAND UP AND OUTER ANTENNA DIPOLE CENTRE INSULATOR ONE ANTENNA FOR EVERY BAND ALMOST!! A BETTER MINI DIPOLE T PEICE THE DOUBLET ANTENNA THE PANTHER A COMMERCIAL ANTENNA AN IMPROVED 7MHZ LOOP ANTENA THE GM4JMU SHORTENED 7MHz DIPOLE A NINE BAND HELICALLY WOUND DOUBLET ANTENNA THE LAZY H WORKS FOR ME THE MARK II CROSSFIELD ANTENNA THE VE3FQW NINE BAND ZIG-ZAG ANTENNA CONVERTING YOUR W3EDP INTO AN 80M LOOP ANTENNA THE GWØNSR FOLDED MONOPOLE SOME IDEAS ON KITE CARRIED AERIALS THE BEVERIDGEOVITCH ANTENNA END FEEDING A HALF WAVE WIRE VIA CO-AX THE BOBTAIL THE MAY SPECIAL AN ACTIVE HF RECEIVING ANTENNA LOOP THE LOOP WITH AAA THE PYTHAGORAS MEGA-KIT THE MOA SHORT SLOPER A LYNX CENTRE PIECE

UDO VELTEN DAVE RAYNER

DL1HCU G4XNP G3LGX

55 56 57 57 57 58 59 59 60 60 61 62 63 64 64 64 64 64 64 65 65 66 66 66 68 68 69 69 70 71 72 72 73 74 75 75 75 75 77 77 78 79 80 81 81 83 84 84 84 85 86

20 14 13 3 16 20 15 28 18 15 22 3 19 4 10 25 26 24 20 10 11 19 18 26 3 14 16 9 12 18 29 37 18 11 19 9 10 18 34 20 12 19 31 27 27 27 24 33 18 30 11

PETER DODD BOB BROWN C.F. ROCKEY DEREK WICKETT C.F.ROCKEY TOM SORBIE DAVE ALLARDYCE GUS TAYLOR BRIAN BOOTH IAN BROWN TOM SORBIE ALEC ANDERSON GUS TAYLOR BEN JOHENSSON C.F. ROCKEY GUS TAYLOR DAVE GOSLING C.F. ROCKY GERALD STANCEY BILL WRIGHT A.W. McNEILL FRANK LEE GUS TAYLOR BEN JOHANSSON KEN MAXTED CONSTANTINE FERUGLIO MIKE MICHAEL ALEC ANDERSON TOM MEIN DAVID GOSLING TONY TUITE OLIVER BORKOWSKI IGOR GRIGOROW LUTZ MIKE HA-JO BRANDT JOHN YOUNG MARK PALMER MAX ALTMANN M. A. EALES

G3LDO NM7M W9SCH G4PXD W9SCH GM3MXN DJ0PJ G8PG G3SYC G3FCK G3TLH GM3MXN GD3HQR G8PG GD3HQR SM6YF W9SCH G8PG GØNEZ W9SCH GM3MCK G0FAH G3FCK G3YCC G8PG SM6YF GM4JMU IV3VS W3TS GD3HQR VE3FQW GØNEZ GWØNSR DF6MS GØNEZ RK3ZK DL2HRP GØROT DJ1ZB G7BCJ G4VPF GØOIW DJ7RU G7SGF

THE GOSLING 8 BAND SMALL GARDEN ANTENNA DAVID GOSLING

FRANK'S MIGHTY MIDGET TEN THOUGHTS ABOUT ANTENNAS THE SOUTHEND SPECIAL SHORT LINEAR LOADED HF ANTENNA THE SWISS ANTENNA - GERMAN STYLE LA ANTENNE VERTICALE BOBINEE (7MHz) THE G3WQW MINI DOUBLET THE SO-CALLED ARTIFICIAL EARTH THE W9BRD COMPACT LOOP A 1:1 OR 4:1 FERRITE ROD BALUN THE NIZHYN SPECIAL CO-AX FED WINDOM A UBIQUITOUS L NETWORK THE G2WI MULTI-BAND VERTICAL A FEW THOUGHTS ON ANTENNA SUPPORTS THE G3HBN COLLAPSIBLE LOOP COVERING 7 TO 30 MHZ FACTORS AFFECTING THE EFFICIENCY OF THE DDR HULA-HOOP PUTTING A HALF SIZE G5RV ON 80M PVC GUSHER ANTENNA MOUNT FOR DIPOLES TESTS WITH AN END FED RESONANT FEEDLINE DIPOLE END FED HALF WAVE ANTENNAS FOR FIXED OR PORTABLE USE THE G3WQW 80M TO 10M SINGLE TOROID COIL Z-MATCH A SEVEN AND A HALF BAND 8 METRE LONG ANTENNA THE G3OEP ANTENNA THE G4FBS LIGHT WEIGHT AERIAL TRAP EXTRA LIGHT WEATHERPROOF DIPOLE SPACER L-MATCH THE "GUTTERSNIPE" ANTENNA 6M ANTENNA THE CUCKOO-KILLER PARKING LOT PORTABLE VERTICAL THE DRAINPIPE SPECIAL HF ACTIVE ANTENNA FOR RECEPTION LOADING A LONG WIRE WITH G3WQW's ATU THE G3ESP 3.5 TO 28 MHZ FEEDER ANTENNA SYSTEM THE M0AJL COMPACT 5 BANDER THE SEWERPIPE POLE A SIMPLIFIED MEANDER ANTENNA ONLY 6 FEET LONG THE G3GVY LOOP A BACKPACKERS DIPOLE ANTENNA ANTENNA MOUNTING THROUGH A HOUSE ROOF THE ON5NO MOBILE ANTENNA i THE GM3MXN MULTI BAND WINDOM ST. LOUIS VERTICAL A QRP MAGNETIC LOOP MULTIBAND PORTABLE WHIP ANTENNA AN END FED DIPOLE

FRANK LEE AAA TECHNICAL STAFF JACK LUTZ BERGNER ANDRE TART

G3YCC

86 86 86

27 28 27 28 28 26 27 26 26 26 26 26 26 27 28 29 28 29 15 29 28 29 29 28 16 17 35 28 29 31 36 18 23 14 25 27 26 14 26 27 9 12 26 28 28 30 6 12

GØDNC DL2HRP ON5UP

87 87 88 89 89

ROCKY F.G.STEWART PETER GRITSAY A.A.A. TECHNICAL STAFF JACK HOLSTEAD A.A.A. STAFF

W9SCH G3WQW US1REO G3OZC W9SCH

89 90 90 91 91 91 92 92

W9SCH VERSION OF THE W9BRD COMPACT LOOP C.F.ROCKEY

GUS TAYLOR M.A.EALES JOE EVERHART

G8PG M0AJL N2CX AA6AX

93 93 93 94 95 95 96

F.G.STEWART F.G.STEWART A.A.A. TECHNICAL STAFF DAVE BUDDERY HORNDEAN D.A.R.C. BERT FROGATT STEVE ORTMAYER DAVE LUNN BERND ZANDER DOUG GIBSON SAM BILLINGSLEY LEIGHTON SMART MARCO ELEUTERI VICTOR BRAND W. FARRAR M.A.EALES JOHN CRAWLEY A.A.A. TECHNICAL STAFF M.G. JAMES IAN BUTTERWORTH TOM SORBIE G. De SMEDT T. SORBIE DAVE GAUDING RAY GOFF MARCO ELEUTERI ANDREW SMITH

G3WQW G3WQW

G3OEP G0FYX G3SOX G4RAW M0AJL G3LSL DL6YCG G4RGN AE4GX GW0LBI IK0VSV G3JNB G3ESP M0AJL GM3LBX

96 96 97 97 97 98 98 98 99 100 101 101 101 101 102 102

THE M0AJL MULTI-BAND VOLTAGE FED ANTENNA M.A.EALES

G3GVY G4BZO GM3MXM ON5NO GM3MXN NF0R G4FON IK0VSV G4OEP

102 104 105 105 105 108 109 110 110

A SIMPLE NVIS 2 BAND ANTENNA THE "EIGHT ESSQUE" ANTENNA AN 80 AND 40 METER END-FED ANTENNA A SINGLE FEED ANTENNA FOR 3.5 TO 21 MHz 10 TO 20 METRE SHORT LOADED DIPOLE WITH 160 METRE ATTACHMENT AN EXPERIMENTAL, MULTIBAND, PRE-TUNED, COAXIAL STUB ANTENNA SARDINE RECEIVER ANTENNA USING THE FT817 AND MIRACLE WHIP THE 20M HBA UNITENNA AN EXPERIMENTAL 20FT HIGH VERTICAL FOR 7MHZ THE LITTLE WIZARD

BERND ZANDER JOHN BEECH E. VOELLER JIM BRETT G.A. DAVEY GUS TAYLOR DUNCAN WALTERS TED LANDON GOTTFRIED KLOYER WOLF JUERGENS DESMONG VANCE ALAN TROY

DL6YGG G8SEQ DL2QA G0TFP G4XSM G8PG G4DFV G3MHT DL2MFJ DL2WRJ GI3XZM G4KRN

110 110 111 112 114 115 116 118 118 119 119 119

30 34 30 30 28 30 25 16 18 12 28 28

TenTec Topics

Title

160m TRANSVERTER FOR THE ARGONAUT VOLTAGE REGULATOR FOR THE ARGONAUT ARGONOUT TRANSVERTER SWITCHING CONVERTING THE ARGONAUT TO 160m ADDING 10 MHZ TO THE ARGONAUT FITTING AN ATTENUATOR TO THE ARGONAUT QRO WITH THE ARGONAUT ARGONAUT MODIFICATIONS ARGONAUT 509 RIT IMPROVEMENT TEN-TEC MAD VFO DISEASE - ANOTHER CAUSE TEN-TEC MAD VFO DISEASE - MORE NOTES ATTENUATOR FOR THE ARGOSY ARGOSY BREAK-IN MODIFICATIONS MORE ARGOSY II MODIFICATIONS A QRP FREQUENCY COUNTER

Author

COLIN TURNER BRICE ANDERSON GEORGE DOBBS S.MATTSON GEORGE SCHOLTER MARK GOODFELLOW JACK McDERMOTT B.C. WEAVER ELMER VOLLER JOHN LIVINGSTON TED TROWELL TOM SORBIE BILL WRIGHT NEIL MACKINNON OLIVIER ERNST

Callsign

G3VTT W9PNE G3RJV SM6AOQ LX1BK G4KUQ GI4NMZ WU2J DL2QA G4FDD G2HKU GM3MXN GOFAH G4WAZ F5LVG

Sprat

26 28 32 34 36 37 59 72 74 98 98 40 53 64 107

Page

9 17 10 6 11 9 24 14 20 18 18 11 21 27 12

Reviews

Title

WIFB's QRP NOTEBOOK LOW POWER COMMUNICATIONS VOL1 THE STORY OF THE KEY DATA BOOK FOR HOMEBREWERS AND QRP ERS INTRODUCING QRP THE ELECRAFT KX1 K2 OR FT817? RICHARD ARLAND LOUISE RAMSEY MOREAU PAUL HARDEN DICK PASCOE PAUL BARLOW JOHN TEAGUE K7YHA W3WRE NA5N GØBPS M0CDP G3GTJ

Author

Callsign

Sprat

69 71 86 87 87 119 119

Page

26 28 25 10 34 16 24

General Mods.

Title

TS120V MODIFICATION THREE BAND DC RECEIVER TOP 'N' EIGHTY DC CW RECEIVER AUDIO CW FILTER AND AMPLIFIER TEST PROBE THREE BAND RF AMP FOR HW7 AND OTHERS ADJUSTING THE POWER OUTPUT OF THE TS50 TS50 ON 5 WATTS AF LOW PASS FILTER FOR THE GQ TRANSCEIVER (OR OTHERS) MODS FOR THE POPPET 160M AM TRASMITTER MORE MILAGE FROM THE PIXIE SOME NOTES ON THE GQ20 (OR GQ40) THE MALTA 20 - MODIFIED MODIFIED MALTA 40 (SPRAT 78) THE MALTA ON 20 METRES UNBELIEVABLE RESULTS WITH A NORCAL - 40 A CW GENERATOR AND SIDETONE FOR THE EPIPHYTE ADDING CW TO THE EPIPHYTEi NOTES ON THE G3RJV SPRAT TRANSCEIVER A LOUDER EPIPHYTE 2 MOTORS FOR DRIVING VARIABLE CAPACITORS EPIPHYTE MK.2 - MODIFICATIONS HOT GLUE AIR WOUND COILS LITTLE TIPS FOR THE FT7 QRP MOD FOR THE YAESU FT-747GX WEATHERPROOFING PL259 HOW TO GET FIVE WATTS FROM A TS50 WITHOUT INTERNAL MODS SOME GENERAL MODIFICATIONS TO THE JBS TRANSMITTER TWO MODS FOR THE TCF AND COMPUTAROCK THE QRP+ & LOG-EQF AND ANOTHER QRP+ MOD SPLIT-FREQUENCY ADDITION FOR VFO Tx/Rx ANOTHER VXO CIRCUIT RECEIEVER INPUT FILTERS EXTENDING CRYSTAL PULLING RANGE DESTROY SUBHARMONIC RESONANCES IN TRANSISTOR PA CIRCUITS ­ PART II - OR HELP FOR TENTEC 1320/30/40? RF ATTENUATOR FOR MFJ CUB MODS FOR THE SUDDEN RX MK2 CONVERT YOUR POWER METER TO READ PEP HEPPING UP THE NE612 AND LM386 CONVERTING THE 30M MFJ CUB TO VXO A CURE FOR DRIFT EPIPHYTE 3 MODIFICATIONS CONVERTING THE 20m MFJ CUB TO VXO OPERATIONi ANOTHER MOD FOR THE QRP PLUS POLYCON SHATF PROBLEM SORTED USING PIN 7 OF THE LM386 TO REDUCE BCI AND ADD SIDETONE TO THE PIXIE 2 RESULTS WITH THE SUPER VXO STABILITY IMPROVEMENT FOR THE HW8 VFO A CASCODE SINE WAVE OSCILLATOR IN SMD OVERTONE OSCILLATORS, THE EASY WAY

Author

DOUG HILL MARTYN LINDARS PETER BRENT Rickett, W. J. DUNCAN CADD WALTER WOLF SCHWARZ STEVE HARTLEY GEORGE DAVIES BERND SZYMANIAK GUY WINANT BOB BOWDEN PETER ZENKER DAVID BOWMAN GRAHAM FIRTH H.F. Knott and Jim Walker TONY FISHPOOL BILL DURHAM ROGER POWELL ALAN UPTON BERND ZANDER LEIGHTON SMART RON WILSON W.FARRAR GERALD STANCEY K.P.S. KANG ROY WALKER STEVE TAYLOR PAUL DEBONO MARCO ELEUTERI IAN BRAITHWAITE HA-JO BRANDT JAN VERDUYN MIKE McGRATH IAN KEYSER BILL CURRIE KEN MAXTED CLIVE HOLLINS IAN BRAITHWAITE ROY WALKER VICTOR BRAND SVERRE HOLM MIKE McGRATH ANDREA INSOLERA STEFAN PETROV JOHN HEY

Callsign

G3ZWH G4LEG G8LJO GØUTY G3ESP DK4RW G0FUW G3ICO DL7GK ON6GW G3IXZ DL2FI G3LUB G3MFJ G4WIF G3DNE G0AOZ G3UZU DL6YCG GW0LBI G3DSV G3ESP G3MCK VU2OWF G0TAK G4EDG 9H1FQ IK0VSV G4COL DJ1ZB G0BBL G8XLC G3ROO VK2AWC GM4JMU M5CHH G4COL G0TAK G3JNB LA3ZA G8XLC I2IAL LZ10V G3TDZ

Sprat

28 35 40 59 61 73 86 87 88 91 92 92 92 92 92 93 93 94 95 95 98 98 98 98 98 101 101 104 104 105 105 105 107 107 108 110 110 111 112 112 114 114 114 113 115 115 117 118

Page

18 3 6 18 24 26 16 26 23 24 25 24 16 16 12 14 12 20 25 25 7 28 19 20 28 27 25 10 26 14 15 18 4 9 8 20 21 19 14 26 16 24 25 18 4 22 3 8

QRP CONTROL OF THE TS430 SIMPLE VARICAP DIODE TUNING THE LEDEKTOR 3 A USEFUL RIT CIRCUIT FOR VXO USE A SIMPLE CRADLE FOR THE FT817

EDDIE MCLEAN GEORGE BURT RUDI BURSE DUNCAN WALTERS CHAS WATKINS

GM4EWM GM3OXX DK2RS G4DFV G3TTZ

118 118 117 119 119

21 26 19 14 26

Heathkit

Title

IMPROVING THE HW7 - PART 1 IMPROVING THE HW7 - PART II HW8 MOD SIMPLE HW8 MODIFICATIONS THREE GOOD HW8 MODS HW8 RIT CONTROL HW8 IMPROVEMENTS COPYING THE HW8 - THE HMW8 CONVERTING THE HW7 FOR 10 MHZ HW8 MAC MOD SQUAD 30m FOR THE HW8 HW8 'S' METER A SELECTION OF HW9 MODIFICATIONS SINGLE SIGNAL SELECTIVITY FOR THE HW7 PUTTING THE HW8 ON THE WARC BANDS FILTER MODS FOR THE HW9 UPGRADING THE HW7 STABLE VFO FOR HW9 DIGITAL READOUT FOR HW9 CURING HW9 DRIFT NEW LIGHT ON THE HW7 MODS MACMOD HW9 IMPROVEMENT SIMPLE HW9 MODIFICATIONS AN HW9 SELECTIVITY IMPROVEMENT IMPROVING THE OVERLOAD OF THE HW9 SIMPLE HW9 MODIFICATIONS BAD HW8 OUTPUT CORES MORE NOTES ON THE HW9 HW7 RIT MODIFICATION NOW YOU SEE IT - NOW YOU DON'T TUNING MOD HW8 AUDIO MATCHING FILTER GOES STEREO

Author

HA-JO BRANDT HA-JO BRANDT JOHN SPINKS TOM SORBIE J.LIVINGSTONE PETER SCHAUFEL MIKE PERRY PAVEL CUNDERLA GEORGE SHCOLTER KEN MAXTED HOWELL CHING BENELUX QRP CLUB D.A. MICHAEL BOB FOWLER CAM HARTFORD JACK CLENNON TOM SORBIE GEORGE SCHOLTES TOM SORBIE KEN MAXTED BERNHARD SZYMANIAK PAUL J. LEVESQUE IAN LISTON-SMITH BERNHARD SZYMANIAK MICHAEL CZUHAJEWSKI IAN BUTTERWORTH BOB LOWE GUS TAYLOR MALCOLM EALES

Callsign

DJ1ZB DJ1ZB G4GIE GM3MXN GM4FDD HB9IK PA3ASC OK2BMA LX1BK GM4JMU KH6IJS W3TS LX1BK G3IQF N6GA G4ZQK GM3MXN LX1BK GM3MXN GM4JMM DL7GK KB1MJ G4JQT DL7GK WA8MCQ G4BZO ZL1AYN G8PG M0AJL

Sprat

9 10 17 18 20 23 24 28 36 38 39 39 55 55 57 59 59 60 62 64 66 67 70 71 72 73 75 75 78 89 99

Page

10 5 15 7 5 9 13 14 11 10 16 4 10 7 10 22 17 16 24 21 9 10 18 18 17 25 16 19 14 9 13

Kit Reviews

Title

KITS (KIT REVIEW) THE KANGA VFO KIT. VARIABLE OUTPUT FROM THE FT-7 THE NORCAL-20 TRANSCEIVER KIT FREQ-MITE WALTER FARRAR DOUG HENDRICKS TONY FISHPOOL G3ESP KI6DS G4WIF

Author

Callsign

Sprat

51 76 95 96

Page

12 16 27 18

Misc. Topics

Title Author Callsign Sprat Page

SHIFT THOSE ROCKS CRYSTAL POSSIBILITIES FOR QRP WORK MAKE YOUR PM3A INTO A PM3X BROADBAND AMPLIFIER AND DRIVERS BROADBAND PA FOR 20 METRES COHERENT CW - PART 1 COHERENT CW - PART II THRESHOLD GATE NOISE LIMITER CHEAP SSB GENERATOR QRP FINAL SOLAR POWER REGULATOR HINTS ON MAKING PCBs MILLIWATTS FROM AN ARGONAUT INPUT V OUTPUT POWER STANDARDS NOTES ON MILLIWATTS FROM AN ARGONAUT QRP ON 10m WITH A LINER TWO PA DESIGN IDEA PASS THAT BAND QRP SQUEEZE KEYER USING CHEAP OLD METERS RELAYLESS RIT CAPACITIVE TOUCH PADDLE UNIVERSAL SIDETONE BASIC 160m CONVERTER CAPICITANCE TOUCH PADDLE TRANSVERTERi SIDETONE OSCILLATOR 128 SET FOR QRP PROVEN MIXER CIRCUITS 10 MHZ QUICKEE CONVERTER 10 MHZ TRANSVERTER VXO FOR THE 30m BAND QRP ON 10m FM ICOM ICB-1050 FOR 10m FM 10 MHz TRANSVERTERi FT7 MODIFICATION QRP TRANSMITTERS AND HARMONIC OUTPUT WARC CONVERTER PLL CIRCUIT FOR SXI UPPER QRP CHANNELS 50 OHM LOW PASS FILTERS FOR TRANSMITTER Q MULTIPLIER FOR THE DRAKE 2C WIDE BAND UNTUNED PREAMP CONVERTING THE LCL2740 CB TO 10m FM IMPRESSIONS ON THE DSB80 PREMIX VFO FOR 10 AND 14 MHzi QRP DX FROM GRAND CAYMAN RF FIRED CW MONITOR MULTIBAND VFO RF ACTUATED CHANGEOVER SWITCH YET ANOTHER 10 MHZ CONVERTER 40m VFO MODS TO THE IC720A FOR QRP OPERATION SIMPLE PSU MODS AND IMPROVEMENTS TO THE TS 120V RECEIVER OFFSET BI-DIRECTIONAL MIXER DIGITAL READOUT FOR DC RIGS RF RELAY DRIVER DAYTON HAMVENTION 1985 DIODE PEAK DETECTOR FOR QRP HOWES RX ON MULTIBAND RE-USING OLD PANEL METERS 160m TRANSVERTERi

GORDON BENNET HA-JO BRANDT GUS TAYLOR HA-JO BRANDT HA-JO BRANDT JOHN STOCKLEY JOHN STOCKLEY L.IVIN IAN KEYSER BRICE ANDERSON JOHN IAN KEYSER CHRIS PAGE ADE WEISS CHRIS PAGE J.HARKIN GEORGE BURT DAVID REYNOLDS DAVE POWELL BRIAN CASTLE IAN KEYSER ROY LEWALLEN WALT LEGAN GEORGE DOBBS BOB NEWSON GEORGE BURT BILL COOPER MARTIN SWAN MARTYN LINDARS FRANK LEE TOM SORBIE HA-JO BRANDT RICH ARLAND JOHN REYNOLDS KEN MAXTED COLIN TURNER DOUG DEMAW HA-JO BRANDT GIG DRAGULESCUR ED WETHERHOLD COLIN TURNER LEN COLLEY

G3DNF DJ1ZB G8PG DJ1ZB DJ1ZB G3FMW G3FMW G5IC G3ROO W9PNE W6PQZ G3ROO G4BUE WORSP G4BUE GM4HBM GM3OXX G3ZPF G3ZXK G4DYF G3ROO W7EL KA4KXX G3RJV G4EEM GM3OXX G4CIA G4LDG G3YCC GM3MXN DJ1ZB K7YHA G3PTO GM4JMU G3VTT W1FB DJ1ZB YO6HQ W3NQN G3VTT G3AGX EI7EH DF4SQ W5QJM G4DEP EI3DY G4COL GM3RKO W7ZOI W9PNE ZL2RP G3OIC G4EZF GW4GIU GW3SB GM6JAG G4BUE ZS6HV G3FCK G4EZF G4DMH

MATT VOLKERT FRED BONAVITA DAVE DABINETT MIKE STAUNTON IAN BRAITHWAITE NOR McINTOSH WES HEYWARD BRICE ANDERSON B.GOODGER JOHN CROXFORD DAVE LOGAN MIKE KOBLIC CHRIS BRYANT MEL EVANS CHRIS PAGE GRAHAM LAMBERT MAC McNEIL DAVE LOGAN MALCOLM HORTON

3 5 7 8 9 10 11 12 15 16 16 17 18 19 19 19 20 20 20 20 25 26 27 28 28 28 29 30 30 31 31 31 32 34 35 35 35 35 36 37 37 37 38 38 38 38 38 39 39 39 40 40 40 41 41 42 43 43 44 44 44 44 45

7 7 10 5 19 5 6 12 3 9 3 6 9 3 11 11 15 16 7 4 13 10 3 8 10 17 9 4 9 17 10 8 16 7 7 17 5 9 6 10 12 12 11 16 12 18 7 5 8 17 3 15 5 7 12 3 19 19 13 17 7 21 6

CHEAP HI - Z HEADPHONE IDEA JAGGY NOISE LIMITER SINE WAVE SIDETONE AUTO KEYER DANDELION SEEDS IN THE WIND KEYING AND SWITCHING WITH CMOS ICs RF PRE-AMP SIMPLE QRP WITH THE TS120/130 AUTOMATIC INTERNAL/EXTERNAL VFO SWITCH PROPOGATION NOTES RF GAIN CONTROL FOR THE ARGOSY LINEAR AND STABLE VFO FOR 14 MHZ 14 MHZ TRANSVERTER CENTURY 22 APPRAISAL SEMI - BREAKIN T/R SWITCH ANTENNA TO IONOSPHERE MATCHING MLX BOARDS OOPS SOME ARTICLE UPDATES ROUND NOSED PLIER CLAMP THE SUFFOLK TROPHY APPLICATION FOR THE MLX SSB BOARD IS THERE A 4406 IN YOUR RIG MILLIWATTING ON 2304 MHZ SEMI BREAK-IN AND SIDETONE CIRCUIT THE CHELMSLEY TROPHY 1987 80 METRES QRPi A PCB TIP ACTIVE FREQUENCY DOUBLER ADAPTING HC25 CRYSTALS TO HC6 HOLDERS CHECK YOUR OPERATING PROFICIENCY THE PROTECTION OF POWER MOSFETS AN OUTBOARD AUDIO MODULE FOR RECEIVERS CONSTRUCTORS TIPS PLASTIC DIALS STAND W.G.AND AMERICAN W.G. CLASS A BUFFERS (THEORY V PRACTICE) THE HISTORY OF QRP EOROPEAN CW ASSOCIATION G3ASV VHF TX PCB GOOD QRP OPERATING T/R CONTROL FOR DC TRANSCEIVER THE SUFFOLK TROPHY A QRP VISIT TO OK COALS TO NEWCASTLE IAMBIC KEYER MILLIWATTING AND MICROWATTING PRACTICAL WIRELESS 144 MHZ QRP CONTEST 10 USEFUL HINTS AND TIPS 13.8v FROM A 12v REGULATOR ANYONE FOR THE 1000 METRES-PER WATT AWARD HOW THE CLUB WORKS EMC DIRECTIVE TALKING BOOKS FOR THE BLIND KANGA ILLEGAL ONER BOARDS NON-ETCHED PCB IDEA SMT - SMD - QRP THE G-QRP CLUB SPONSOR A MEMBER SCHEME COHERENT C.W. G3RJV TRIES S.M.D. QSL STORAGE IDEA ANOTHER RIT CIRCUIT BALANCED MODULATOR DIRECT CONVERSION RECEIVER SELECTIVITY PROJECT FREQUENCY BAND A CONDENSED REP,

GEOFF POLLITT MEL EVANS RAY GREENWOOD BEV BRANDEN JOHN TRENT MATT VOLKERT MIKE MICHAEL BRIAN AUSTIN IAN BRAITHWAITE MIKE MOLINA JIM LYON MATT VOLKERT ELMAR VOLLER COLIN TURNER GRAHAM RANFT VLADIMIR ADEMOV

G4NPQ GM6JAG G4OQQ G4TDU KL7DG DF4SQ W3TS ZS6BKW G4COL EA3FHC VE2KN DF4SQ DL2QA G3VTT VK7ZO

P DAVIES MIKE HENLEY PETER LINSEY TERRY YOUNG COLIN HAWKINS A.W. McNEIL RONNIE MARSHALL IAN BRAITHWAITE BRIAN HARRIS GUS TAYLOR ALAN UPTON WES HEYWARD COLIN HAWKINS

G8BHI G4JXX G3PDL K4KJP GØCEU G3FCK GM4JJG G4COL G3XGY G8PG G3UZU W7ZOI GØCEU G3ZOM WØRSP G4FAI G3MCK G3MBN G3VTT NM7M G3ROO G4BUE GMOFUW G3YCC G4RAW G3CCB

ADE WEISS TONY SMITH GERALD STANCEY

COLIN TURNER BOB BROWN IAN KEYSER CHRIS PAGE STEVE HARTLEY GEORGE DOBBS A.S. CHESTER

45 45 45 46 46 46 46 46 47 47 47 48 49 49 49 50 50 50 50 50 51 51 51 51 51 52 52 52 52 52 52 53 53 53 54 54 55 55 55 55 55 56 56 56 56 56 57 57 57 57 58 58 59 59 59 59 60 60 60 61 61 61 61

10 21 20 16 19 4 3 18 10 22 17 6 4 19 17 18 13 15 21 15 3 6 24 5 23 21 11 4 19 24 20 10 9 9 13 23 22 6 23 3 21 18 20 8 26 21 20 8 8 21 3 13 9 23 12 25 13 33 19 23 33 11 26

BOB LEASK BILL MOONEY DAVID JACKSON PETER LUMB VIC FLOWERS IAN KEYSER RAY SMITH GUS TAYLOR

G4CEO G3VZU G4HYY G3IRM G8QM G3ZOM G3ROO ZL2AQV G8PG

A POSOTIVE APPROACH TO BREAKTHROUGH AN S.M.D. IAMBIC KEYER SYSTEM (PART 1) DRILL TIP OBSERVATIONS ON G4ZWH POWER METER RULES FOR LOW POWER FIELD DAY 1990 S.M.D. CAPACITIVE TOUCH PADDLE TRANSISTER MARKING AN SMD IAMBIC KEYER SYSTEM (PART 2) SURFACE MOUNT TECHNOLOGY :HAM STYLE A TIP FOR CROSS HEADS NEAT AND UGLY PASSIVE 800HZ FILTERS USING 88MH TOROIDS AGCW QRP CONTESTS RULES DON'T SQUANDER YOUR INHERITANCE NOVICE NEWS REDUCING VOLTAGE CONVERTER NOISE G QRP CLUB PACKET BBS LIST HF FIELD DAY AND QRP THE LYNNE 555 AUDIO OSCILLATOR AROUND THE WORLD IN 40 DAYS IMPROVED DESOLDERING PUMP NARROW BAND T.V. ASSOCIATION SOME RUSSIAN CW SLANG TAKE CARE WITH THAT VACUUM CLEANER TWO TIPS FOR SCREWDRIVERS/CONSTRUCTION

BILL MOONEY BILL MOONEY

G3VZU G3VZU VK6BWI G3DNF G3VZU G8SEQ G3VZU G3KMG G3DNF G3MNO DJ1ZB G3DNF GM4TYO G0NEZ G3DMF G4BUE G4SGF/ZB2M G3LDO G4FQQ

BILL MOONEY JOHN BEECH BILL MOONEY DAVE PLUMBRIDGE

HA-JO BRANDT FRANK LEE DAVE GOSLING GORDON BENNET CHRIS PAGE KEN RUIZ PETER DODD

G3OUC JIM HARRISON DAVE ACRILL GERALD STANCEY S BEAUCHAMP R.D. SEXTON FRED BONOVITA PRODUCT REVIEW GØDJA G3MCK G3SYD G4IZS W5QJM DL7GK G8SEQ G4UMB

FINDING METER INTERNAL RESISTANCEi HC6U ADAPTER LOCAL TECH HELP IN CRAWLEY LOCAL TECH HELP IN DURSLEY THE HB9ADQ MULTIBAND DELTA LOOP A PLEA!! KRISTA IAMBIC KEYER CHEAP'N EASY TOUCH PADDLES FOR THE CURTIS BERNHARD SZYMANIAK 8044 CHIP FREQUENCY MULTIPLIERS JOHN BEECH CW KEYER AND SIDETONE PETER HOWARD EEC EMC REGULATIONS AND THE FUTURE OF KITS SIMPLE TOUCH KEYER STEVE COLLIS FRENCH CALLSIGN CHANGES THE FIRST AMATEUR RADIO CONTACT USING A TRANSISTOR A REVIEW OF THE S.E.M. QRM ELIMINATOR GUS TAYLOR CONTEST FATIGUE REDUCERS MIKE MICHAEL TWO QUICK TIPS FROM FRANK LEE G3YCC FRANK LEE A SIDETONE FIX FRANK LEE MFJ 9040 AGC FIX THE NORTHERN CALIFORNIA QRP CLUB VK CW OPERATORS QRP CLUB BUILDING THE NORCAL 40 TRANSCEIVER DAVE ANTHONY "HOMEBREW" DO-IT-YOURSELF SPRAT BINDERS ROY SMYTH SM7UCZ VINTAGE VALVE RECEIVER - UPDATE DOUG SSB MOBILE WITH THE MIZUHO BYRON WEAVER THE APPLETON PROJECT THE MALTA 40 - SOME CONSTRUCTION NOTES CLIVE GRAHAM CORRECTION VK2AW MINICOM FURTHER NOTES ON THE MALTA 40 MIKE FAULKENER WORKING WITH PCB MATERIALS JOHN BEECH SPIRITUS TRANSISTOR BASTA ROBERT VAN DER ZAAL A MORSE KEYER IN CMOS RICHARD HANES A SLOVAKIAN INTERLUDE FRED GARRATT LM386 HINTS WAYNE BURDICK SURFACE MOUNT TECHNOLOGY R J HARRISON FOUR DAYS IN MAY GEORGE DOBBS THE GØBZF KEYER DAVE REID

62 62 62 62 62 62 62 63 63 64 64 64 65 66 66 66 68 68 69 70 70 71 71 71 71 72 72 72 72 72 73 74 74 76 76

18 10 7 37 35 10 32 8 16 15 21 9 27 19 33 14 39 38 12 28 7 14 15 28 19 21 21 32 32 20 26 6 29 14 28 14 20 30 8 19 15 23 23 8 12 18 25 26 34 26 20 22 22 37 17 6 22 28 20 18 11

F1NZY

G8PG W3TS G3YCC G3YCC K4ADL

76 77 77 78 78 78 79 79 79 79 80 80 80 80 80 80 81 81 81 83 84 84 84 84 85 85

W5NOE GI4CBG G4RGN WU2J G3XIG GØIFK G8SEQ PA3BHK GØRPH G4HOM N6KR G3TMQ G3RJV GØBZF

A FUN IAMBIC KEYER PADDLE CUTTING HUM IN THE HWA7-1 POWER SUPPLY AND OTHERS FOUR DAYS IN MAY UPDATE HOW TO PATCH THE QRP-PLUS EPROM THE G4OPE IAMBIC KEYER WITH MEMORY THE MICRO TUTOR WATCH OUT EMC AND AMATEUR RADIO KITS FURTHER OBSERVATIONS ON PL259 PLUGS PW SEVERN BUILDERS BEWARE THE DKØWCY STAND-OFF TWO TIPS FOR CONSTRUCTORS VARICAP TUNING WITH CONSTANT RIT OFFSET VLF COMES TO THE UK HANDY HINTS FOR A HAPPY SHACK NOTES ON THE GM3OXX CW FILTER FOUR DAYS IN MAY SYMPOSIUM QRP CALENDAR 1997 AN ALTERNATIVE AUDIO AGC USING THE G3ROO SYNTH WITH THE G4OPE DDS VFO SSB TRANSMIT IF : A REPLACEMENT SCHEME FOR SL1600 IC's THE LCK REVISITED A CHRISTMAS PROJECT AN AUDIO SPEECH PROCESSOR EXTRA AUDIO GAIN FOR THE LCK MAKE A BOX THE 74HCU04 - MISRES DREAM CAPACITANCE vs VOLTAGE FOR SOME COMMON DIODES THOUGHTS ON TOP BAND A LOW BATTERY VOLTAGE INDICATOR CARRIER INSERTION OSCILLATOR EXPERIMENTS WITH GILBERT CELL MIXERS NOISE CANCELLING MICROPHONE AUDIO PRE-AMP FOR THE EASY-THREE RECEIVER [SPRAT 92] CARDBOARD CIRCUIT BOARDS DO WORK! AN EPIPHYTE IN CHILE EMMA'S CHALLENGE WORKING WITH WALL WARTS CMOS MIXER EXPERIMENTS FINISHING FRONT PANELS PENNING DOWN CRYSTALS 137Mhz BANDPASS FILTER A CRYSTAL CHECKER CERAMIC RESONATORS FOR CHEAP AND CHEERFUL VFOs ENHANCED KENWOOD TS-520 QRP OPERATIONS LOW-VOLTAGE OSCILLATOR FEATURES INCREASED SPECTRAL PURITY REGULATOR WITH FAIL SAFE MONITORING SINE WAVE AUDIO GENERATOR VARIOUS MIXERS A SIMPLE SIDETONE A UNIVERSAL VFO/EXCITER MORE ON USING WALL WARTS RECEIVER CW FILTER TWO USEFUL METER CIRCUITS QRP TRANCEIVERS USING WIDE RANGE VXO's THE SNOWFLAKE [1 & 2] A QRP DUMMY LOAD CIRCUITS AND SHORT CUTS :POT LUCK

EARL MEAD FRED BONAVITA ANDREAS TOMIAK MICK HODGES DAVE REID MAC MCNEILL RSGB PRESS BULLETIN GEOFF ARNOLD GORDON J. BENNETT DOUG MEPHAM ELMER VOLLAR

AB6CN W5QJM DH7ADR G4OPE GØBZF G3FCK G3GSR G3DNF G4ERA DL2QA

86 86 86 86 86 86 86 87 87 87 87 87 87 87 88 88 89 89 90 91 92 92 93 93 93 93 93 94 94 95 95 95 95 96 96 97 97 98 99 99 99 100 100 100 100 100 100 100 100 101 101 101 101 101 102 102 102 102

19 24 25 20 8 12 15 13 26 16 32 16 11 26 32 20 29 32 13 23 6 18 5 26 19 25 16 26 27 13 35 17 36 25 24 25 26 16 26 10 6 33 13 16 24 22 12 3 34 11 8 13 17 12 6 8 9 16

WALTER FARRAR

G3ESP

JOHN HEY MALCOLM HORTON SHELDON HANDS IAN KEYSER ALBERT HEYNES GARY PODGORMY RICHARD HANES JOHN SHAW BILL CURRIE PAUL HARDEN LEIGHTON SMART HA-JO BRANDT STEVE ORTMAYER IAN BRAITHWAITE JOHN BEECH C.F. ROCKEY ROD SEYMOUR KENN EVERARD EMMA CONSTANTINE FRED BONAVITA LEON WILLIAMS VARIOUS AUTHORS RICHARD WELLS STEVE ORTMAYER WALTER FARRAR JACK PONTON DAN CASE MARCO ELEUTERI JIM BRETT FRANK BRUMBAUGH JOHN BEECH ANDRE MASSIEYE BILL CURRIE GIANCARLO MODA LUIGI ADRIATICO JOHN HEY NORBERT LITZ DAVE PENNY GARETH EVANS DON CALLOW

G3TDZ G4DMH GW0ELR G3ROO G4ZHE EW1MM G0RPH G3ZKZ VK3AWC NA5N GW0LBI DJ1ZB G4RAW G4COL G8SEQ W9SCH G1TNE CE8/G0NKZ 2E1BVJ W5QJM VK2DOB G0RXH G4RAW G3ESP GM0RWU KB0JUL IK0VSV G0TFP W4LJD G8SEQ F5JDG VK3AWC F-I7SWX I0KWK G3TDZ HB9BWY G3PEN G4XAT VK5AIL

A CONNECTOR BLOCK TOOL RACK VK WITH 5 WATTS ON 160 METRES A SIMPLE DDS A PCB DRILL IDEA COIL FORMERS USING DIN PLUGS THE ONE CORK PIN-OUT CHECKER ADVENTURE RADIO VERY WEAK SIGNAL RECEPTION RECYCLED COMPUTER BITS MORE HEARING AID ADVICE PSK ­ THE NEW CW? (OR MAYBE NOT) UR-QRP CLUB EXPEDITION SPACE JUNK 101 THINGS TO DO WITH A DEAD MOUSE A RESONATOR VXO WIND POWER TRY SURFACE MOUNT CONSTRUCTION PULLING CRYSTALS EVEN FURTHER THE TAK893 DOUBLE BALANCED MIXER DESIGN OF SURFACE MOUNT OSCILLATORS HF SELECTIVE MICROVOLTMETER

i

A. ASPINALL IAN KEYSER JOHN COOPER RORY GEOGHEGAN ALAN UPTON DR. KEN CRAVEN RICHARD NEWSTEAD PETER DODD TIM OSTLEY BRIAN ALDERSON RICHARD CONSTANTINE PETER P GRYTSAY TIM OSTLEY ROY WALKER T.T. MANI JOHN BEECH GEORGE DOBBS Dr. ANDREW SMITH G.FIRTH / P. HARDEN RICHARD TORMET MILAN CATARI BILL CURRIE WALTER FARRAR PATRICK SMITH FRITS OGG PHIL COOPER RUDI BURSE INGO MEYER DOV RABINOWITZ PAUL HARDEN BILL CURRIE BILL DURHAM TONY LYMER MIKE AUSTIN ROY WALKER BILL HICKOX JACK GENTLE PAUL COURT LUIGI ADRIATICO KARL ELMSJOE GEORGE WOODWORTH HANS SCHROEDER IGOR GRIGOROW STEVE RAWLINGS SVERRE HOLM MARCO ELEUTERI STEFAN PETROV HARRY BRASH JIM BRETT STEF NIEWIAOMSKI TEF NIEWIAOMSKI JIM LEVISTON DAVID SMITH

G0NDM G3ROO G8GKU G3UZU G4LKP G3CWI G3LDO M5TIM G3KJX G3UGF US1REO M5TIM G0TAK VU2ITI G8SEQ G3RJV G4OEP G3MFJ/NA5N N8YSK 9A9RA VK3AWC G3ESP GW0VMR PA2LIA GU0SUP DK2RS DK3RED AD0V NA5N VK3AWC G3DNE GM0DHD M0AAB G0TAK K5BDZ G0RVN G1ROK I0KWK SM3CLA GW4ZAG AE9G RK3ZK GW4ALG LA3ZA IK0VSV LZ1OV GM3RVL G0TFP

102 102 103 104 104 104 105 106 106 106 106 107 107 107 107 107 108 108 108 108 109 109 109 109 109 109 110 110 110 110 110 110 110 110 111 111 112 113 113 114 114 114 114 115 116 116 116 116 119 119 119

17 25 19 9 16 17 10 10 13 16 17 6 15 16 20 34 4 15 24 27 3 6 8 9 16 20 5 10 11 14 16 17 24 29 10 13 29 13 26 17 20 21 22 21 4 14 20 26 4 15 18 25

THE FREQUENCY FINDER i A CRYSTAL CHECKER OPEN FEEDER CURRENT METER & RF SNIFFER QRP POWER SUPPLY BASED ON LAMP OIL SETTING AUDIO LEVELS FOR DIGITAL MODES "LAUSER-PLUS" TWO BAND MIXER THE NJ ISLANDER & IC's MOUNTING IC SOCKETS a la MANHATTEN QRP AND S UNITS BOOSTING THE LM386 A ONCE ONLY SIDETONE OSCILLATOR A SIMPLE METHOD FOR MEASURING PEP A FEW RADIATION/ABSORPTION METER IDEAS HELP YOURSELF TO HEAR CURRENT LIMITING BATTERY CHARGER A FEW THOUGHTS ON THE K5BDZ CHARGER DIGITAL MODES FOR FREE NEW RECEIVER CW FILTER SIMPLE RF FIRED CW MONITOR TWO PRACTICAL IDEAS THE ROCK STEADY CRADLE FOR THE FT817 QRP BEYOND BELIEF IS IONOSPHERIC PROPOGATION IN DECLINE? UNLEASHING THE LM386 HOW TO DESIGN POWER SUPPLIES AND CHARGERS A PCB FOR THE I7SWX H-MODE MIXER PLUS A BFO USING COMPUTER MORSE TRAINING PROGRAMS A "KEEP IT SIMPLE" VFO SUPPLY REVERSAL PROTECTION CIRCUIT 74HC04 OSCILLATOR BUFFER AND HARMONIC GENERATOR A QRP WARC SPEED CHALLENGE MAKING PCB'S WITH INKJET PRINTERS

G3NFB G4COE

119

Morse Keys Mainly Electronic

Title

QRP SQUEEZE KEYER SIMPLE AUTO KEYER CAPACITIVE TOUCH PADDLE CAPICITANCE TOUCH PADDLE SIMPLE CMOS KEYER FOR THE QRP RIGS AN ALTERNATIVE KEYING ARRANGEMENT AUTO KEYER MLX BOARDS IAMBIC KEYER AN S.M.D. IAMBIC KEYER SYSTEM (PART 1) S.M.D. CAPACITIVE TOUCH PADDLE AN SMD IAMBIC KEYER SYSTEM (PART 2) ELECTRONIC KEYERi KRISTA IAMBIC KEYER CHEAP'N EASY TOUCH PADDLES FOR THE CURTIS 8044 CHIP CW KEYER AND SIDETONE SIMPLE TOUCH KEYER A SIMPLE KEYER - SUITABLE FOR THE ONER A MORSE KEYER IN CMOS MR MOUSE KEY THE GØBZF KEYER A FUN IAMBIC KEYER PADDLE THE G4OPE IAMBIC KEYER WITH MEMORY THE MICRO TUTOR A SIMPLE TOUCH PADDLE A SIMPLE KEYER A VARICAP TUNING DIAL THE MINI-E-BUG THE TRANSMITTER KEY THE MINI TRANSMITTER KEY AN ELECTRONIC KEYER FOR THE HOME BREWER A MORSE KEY TIP IAMBIC MODE MODIFICATIONS FOR THE DF1KY KEYER A HAND HELD BELL PUSH PADDLE DXKEY ­ PIC KEYER CW PALM MINI PADDLE PLUG SUPPORT ELECTRONIC KEYER TELEGRAPH KEY FOR A QRP EXPEDITION SIMPLE CODE KEY TO ENCOURAGE THE BEGINNER ELECTRONIC KEYING FOR AN ELECTRONIC KEY KEYING THE ELECRAFT K2 FOM A PC HOMEMADE MECHANICAL BUG KEYS

Author

DAVE POWELL GUS TAYLOR ROY LEWALLEN BOB NEWSON ROY LEWALLEN LES TALKOWSKI BEV BRANDEN IAN KEYSER BILL MOONEY BILL MOONEY BILL MOONEY PIERRE FILLINGER PRODUCT REVIEW BERNHARD SZYMANIAK PETER HOWARD STEVE COLLIS K P S KANG RICHARD HANES BILL DAVE REID EARL MEAD MICK HODGES DAVE REID DAVE LUNN MIKE SUMNER JIM HILL HANNES HILLER JOHNNIE APELL JOHNNIE APELL URS HADORN ALBERT HEYES BRUCE BORROWS JAMES BOLTON STEFANO PAPINI RON PRATT JACK BENNETT IGOR GRIGOROW HOWIE KRAUSSE IGOR GRIGOROW STEVE RAWLINGS GREG KNOBEL

Callsign

G3ZXK G8PG W7EL G4EEM W7EL GØSDQ G4TDU G3ROO G3VZU G3VZU G3VZU FE1MOG DL7GK G4UMB F1NZY VU2KLA GØRPH KD7S GØBZF AB6CN G4OPE GØBZF G3LSL G3PVH G4LND DL9SCO SM7UCZ SM7UCZ HB9ABO G3ZHE GM0LLJ G3HBN IK5XCT G4DDX G3PVG RK3ZK W5OM RK3ZK GW4ALG HB9FAE

Sprat

7 7 10 10 11 17 46 50 56 62 62 63 69 73 74 76 76 83 84 84 85 86 86 86 88 90 90 92 93 94 95 97 97 101 109 111 114 114 115 115 116 116

Page

20 12 26 28 22 17 16 13 8 10 10 8 17 26 6 14 76 17 6 35 85 19 86 86 21 23 24 8 6 21 4 17 18 24 18 25 18 26 20 28 17 24

Photocall

Title

YET ANOTHER SIDETONE G3DOP ON QRP WITH 1154 G-QRP CLUB IN DAYTON 20m CW TRANSCEIVER CHERITON TWO BAND RX

Author

KEN MAXTED

Callsign

GM4JMU

Sprat

33 51 51 53 53

Page

15 16 16 15 15

G3RJV

HOME STATION G3JNB UNICHIP TRANSCEIVER SUDDEN RX 80 40 20 VERSIONS G4WUS COMPACT TRANSCEIVER GQRP CLUB IN TEXAS 89 LZI5IM 20m TRANSCEIVER W62H 20m QRP TRANSCEIVER 1991 SUMMER QRP PARTY DIETER TRUMMER OE6WTD MEMBER 5126 THE LYNNE 555 OSCILLATOR K4TWJ PEN TX NAT LAYOUT NO COST ATU MKII THE QRP ARCI HONOR ROLLERS AT DAYTON VARIOUS PICTURES OF DAYTON 92 RICK CAMPBELL KK7B ROY LEWALLEN W7EL THE DAVCO AMATEUR BANDS RECEIVER ANDY STAFFORD G4VPM/5B4 OUR FIRST GW QRP MASTER DAYTON 1993 REPORT THE SHACK OF PHIL (2WØACD) THE LATE LUKE DODDS W5 HKA THE G3TXQ CUB - WHAT A GOOD IDEA QSL BUREAU MANAGER - BOB HUDSON G4JFN SPRAT ILLUSTRATOR - A.W. McNEILL G3FCK THE ANV 20SSB/CW TRANSCEIVER G3RJV (9M8GD) IN BORNEO WEDDING OF G3PDL THE OM9MV CREW TEN MINUTE TX FOUND HIDING IN A GERMAN MORSE KEY QRP ARCI HALL OF FAME INDUCTEES 2003 GEORGE G3ICO WINS G2NJ TROPHY QRP ARCI HALL OF FAME INDUCTEES 2004

MIKE KING

G3MY

53 53 58 59 60 64 64 68 69 69 71 71 71 71 71 72 72 74 74 75 76 78 79 80 80 80 81 83 84 88 115 119 119

16 15 FC FC 21 22 23 35 FC 13 14 13 10 FC 27 FC 30 39 27 29 35 FC FC 27 27 FC FC 34 23 32 COVER COVER COVER

PETER

DJØGD

Receiver Topics

Title

FET REGENERATIVE RECEIVER SR 1.5-4 RECEIVER SILVER TERN SUPER REFLEX RECEIVER IC 1.8-2.5 MHZ RECEIVER DC RECEIVER FOR 80 METRES TWO WATTS OUT WITH AN FT7 DC-77 RECEIVER ROO 10 MHZ RECEIVER HF PRESELECTOR SIMPLE STRAIGHT 2.5-28 MHZ RECEIVER 80 TO 2 METRES RECEIVE CONVERTER LOW POWER SSB/CW HF RECEIVER SIMPLE 14 MHZ RECEIVER 160 AND 30m RECEIVE CONVERTER DIRECT CONVERSION RX FRONT END SPECIAL PURPOSE RECEIVER CQC DUAL BANDER RECEIVER ROCKET RECEIVERi TENOR 80m DC RECEIVERi MIKE MOLINA PHIL HOBSON EA3FHC G4HOJ IAN KEYSER HA-JO BRANDT DON BENHAM JOHN REYNOLDS MIKE SMALL IAN BRAITHWAITE MAURICE SELBY MIKE SOUTHALL WES HAYWARD

Author

HA-JO BRANDT W.JONES EMIL TENLUND IAN KEYSER PETER BRENT FELIX CARBONARA

Callsign

DJ1ZB GW8PLV G3ROO G4LEG I7CCF PAØGBY G3ROO DJ1ZB GW3ZFY G3PTO G4DVI G4COL G4LV G3WWS W7ZOI

Sprat

4 14 15 17 22 22 30 31 33 34 35 37 37 38 38 44 47 47 49

Page

13 5 7 3 8 10 3 16 10 8 18 6 4 4 9 12 3 14 8

THE NIG A SIMPLE SUPERHET FOR 80 AND 40 ON ONE RX THE ONER IMP RX A SIMPLE 29 MHZ DC RECEIVER STABLE RF AMP FOR THE 10 TEC ARGOSY II THE UNO THE UNO ON 40 METRES 7 MHZ O.C. RX USING 74HC4066 THE UNICEIVER TEN TEC OMNI FOR QRP/QRO SWITCHING THE SUDDEN RECEIVER SWITCHED BANDPASS FILTERS FURTHER NOTES ON LINER TWO ON C.W. IC735 MODS 1 KHZ LOW PASS FILTER FOR RECEIVERS THE SUDDEN RECEIVER GOES SMD THE WHITE ROSE RECEIVER SUDDEN RECEIVER MODIFICATION THE FO-RECEIVER A QUALITY AUDIO AMPLIFIER FOR RECEIVERS QSK FOR THE HOWES CTX80 THE NEW ARGONAUT II MODEL 535 Y27BH JUERGEN IN HIS SHACK THE DYMAR 880 SERIES TWO METRES AUDIO AMP FOR DC RECEIVERS RECEIVER SLOW MOTION DRIVE THE MALSOR KITS REVIEWED DOUBLE CONVERSION RX 5'MTR' AND AGC FOR ZN416 FULL QSK WITH THE RAI7 HIGH PERFORMANCE DC RX SSB/CW IF STRIP AN 80 METRE PHASING RECEIVERi DUAL BAND RECEIVER NICKY'S TRF THE POTTENSTEIN RECEIVER FREQUENCY JUMPING ON MIZUHO TRCVRS IC735 MODIFICATION RX POSTSELECTION FOR CW THE G3TDZ PHASING RECEIVER A POLYPHASE RECEIVER NICKY TRF IMPROVEMENTS PEBBLE CRUSHER MODIFICATIONS THE CHEVIN 80MTR SUPERHET THE HERTZVERTER TOP BAND CONVERTERi AN UGLY ATTENUATOR RELAY SWITCHED CERAMIC RESONATORS IN RECEIVERS A 14 MHz SUPERHET RECEIVER A SIMPLE UNIVERSAL H F CONVERTER A HIGH PERFORMANCE DIRECT CONVERSION RECEIVER USING THE ICOM IC726 ON QRP

GEORGE BURT GEORGE DOBBS IAN KEYSER JOHN YOUNG D.A. MICHAEL FINBAR O'CONNOR FINBAR O'CONNOR MATTHIAS RAUHUT COLIN TURNER GEORGE DOBBS BOB CARTER G.BENNET HA-JO BRANDT JOHN HEY HA-JO BRANDT IAN KEYSER BILL LEASK

GM30XX G3RJV G3ROO BRS33339 W3TS EIØCF EIØCF DF20F G3VTT G3RJV G3VSO G3DNF DJ1ZB G3TDZ VK2CWH DJ1ZB G3ROO G4CEO

50 54 54 55 55 56 56 57 57 58 58 59 60 60 61 61 61 62 62 63 63 63 64

24 16 16 18 16 5 7 19 5 12 16 7 17 18 24 19 3 8 6 28 25 26 22 31 13 15 28 6 15 24 18 11 19 10 36 3 9 17 15 19 3 18 16 27 10 28 20 8 14 18 6 35

MIKE OSBOURNE DAVID LIMMER ROY SMITH GUS TAYLOR IAN MACPHERSON BILL MOONEY BOB LEASK MATHIAS VOLKERT DAVE LIMMER JOHN YOUNG STEVE HARLEY COLIN DAVIS Ha-Jo BRANDT ROY KAVANAGH DR. GORDON BENNETT Ha-Jo BRANDT JOHN R. HEY JOHN R HEY DOUG GIBSON TONY LYMER DAVID LIMMER LES JACKSON ROY SMITH IAN MACPHERSON FRANK LEE HARRY POPOV ROELOF BAKKER DAVE ACKRILL

G3YGM G0IWU G8PG GM3RXU G3VZU G4CEO DF4SQ G7BCJ G0FUW G4VPM G3VMU DJ1ZB GM4VKI G3DNF DJ1ZB G3TDZ G3TDZ G4RGN GMØDHD QRP 5668 G4HZJ GØIWU GM3RXU G3YCC LZ1BB PAØRDT GØDJA

65 66 66 66 67 68 68 68 68 69 69 69 70 70 71 71 71 71 72 72 72 72 72 73 73 74 74 75 75

TRIO KENWOOD TRCVRS VARIABLE POWER MOD ANDY STAFFORD

MORE CHATTERBOX MODIFICATIONS THE SUPER 40 RECEIVER EASY LF BANDS RECEIVER THE MINICOM SUPERHET RECEIVERi THE THREEFER THE CONTESTER DC 40m A MINIMUM COMPONENT PHASING RECEIVER FRONT END THE HF9 TRF SHORT WAVE RECEIVER SIMPLER PRODUCT DETECTOR FOR THE CONTESTER RECEIVER MUTING CIRCUIT THE SILVER TERN RECEIVER REVISITED ADD ON RF AMPLIFIER FOR HF9 RECEIVER MODIFICATIONS TO THE EPIPHYTE-2 TRANSCEIVER NORCAL 40 MODS AND ADDITIONS THE PINK RECEIVER THE PIXIE 2 AN UPDATE USING THE FT990 ON QRP EPIPHYTE-2 UPDATE ELIMINATING GROUND LOOPS UNIVERSAL QRP TX MOD EPIPHYTE-2 UPDATE THE PIXIE GOES ON

IAN LISTON-SMITH RICHARD COOK PETER BRENT BASIL DALE MIKE MICHAEL ROELOF BAKKER RICK CAMPBELL KEITH RANGER ROELOF BAKKER ROY LEWALLEN MARTYN LINDARS KEITH RANGER DERRY SPITTLE BERNHARD SZYMANIAK K.P.S. KANG RICK KERR DERRY SPITTLE GERALD DERRY SPITTLE DERRICK WEBBER

G4JQT G4XHE G4LEG VK2AW W3TS PAØRDT KK7B GØKJK PAØRDT W7EL GØKJK VE7QK DL7GK VU2KLA WA6BOY KA8EGS VE7QK G3MCK VE7QK G3LHJ G4HMC G0FQI SM7UCZ GM0RWU W9SCH VK3AWC HE9VXB DK2RS DK2RS F5LVG G0KJK HE9VXB G0KJK VK3AWC F5LVG RK3ZK G3YCC G0BBL 9A9RA G3OGQ/G4DF V GM4ZNX G4RAW F6CRP F5LVG G4BZO G4GVM

76 76 77 79 79 81 82 82 83 84 84 85 86 86 86 86 86 87 87 88 88 90 92 92 92 92 93 94 94 95 97 97 99 100 100 100 101 101 101 102 102 102 102 103 103 103 104

18 22 26 9 15 25 14 4 18 27 12 13 13 18 5 33 23 14 35 22 14 15 26 20 4 3 10 16 15 31 14 8 14 20 19 10 6 3 19 3 10 22 32 4 12 16 14

A DESIGN FOR A HIGH PERFORMANCE RECEIVER DAVID OLIVER 80M ONE CHIP RECEIVER DON BREEN A DIRECT CONVERSION RECEIVER FOR JOHNNY APELL BEGINNERS EXPERIMENTAL DIGITAL CW TRANSMITTERS FOR JACK PONTON 80M ROCK's EASY THREE RECEIVER C.F.ROCKEY A BALANCED DIRECT CONVERSION RECEIVER FOR 80/40/20 THE GREMLINMATE 40M RECEIVER IMPROVEMENTS TO THE GREMLINMATE RECIEVER A NEW DIRECT CONVERSION RECEIVER THE MB4 PORTABLE SW RECEIVER A CMOS SWITCHED 80M SUPERHET A TELESCOPIC ANTENNA DX RECEIVER AUDIO OUTPUT STAGE FOR RECEIVER THE RX-20 RECEIVER 7-14-21 MHZ DIRECT CONVERSION RECEIVER THE EAGLET 80M RECEIVER THE QRP2001: AN EXPERIMENTAL DC RECEIVER The ILOVA 2B - SIMPLE TWO BAND RECEIVER 160M AM RECEIVER AN INEXPENSIVE FILTER AND I.F. AMPLIFIER CRYSTAL SET THE F6CRP RECEIVER LOOP REGENERATIVE RECEIVER LF RECEIVE CONVERTER INCREASING BANDSPREAD WITH VARACTOR TUNING BILL CURRIE

THE BANDBREAKER 40M SUPERHET RECEIVERi ARON SANDERSTROM RUDOLF BURSE R. BURSE OLIVIER ERNST KEITH RANGER ARON SANDERSTROM KEITH RANGER BILL CURRIE OLIVIER ERNST IGOR GRIGOROW FRANK LEE JAN VERDUYN MILAN CATARI GEORGE FARE/DUNCAN WALTERS DAVID STOCKTON STEVE ORTMAYER DENIS AUQEBON OLIVIER ERNST IAN BUTTERWORTH DEREK ALEXANDER

SMID-GEN CW/SSB RECEIVER ON5SJ 40m SUPERHET RECEIVER A STABLE REGEN RECIEVER [WITH CLUB KIT] A SINGLE CRYSTAL CW FILTER ONER RECEIVE CONVERSION A TUNEABLE CW / SSB FILTER

JOHN SMITH JEAN-CLAUDE SATEUR GEORGE DOBBS IAN BRAITHWAITE OLEG V. BORODIN,

G4KJJ ON5SJ G3RJV G4COL RV3GM IK4NPC G4OEP YU1LM G3PCJ DC8KP IK2VTU G3TDZ RV3GM G3YSX G4DFV 9A2HL VK3AWC VU2OWF M0CWY G4DFV GW0VMR G0EBP GM3RXU RV3GM G3YVF PA3CRC G4XEC

105 105 105 106 107 107 109 109 110 111 111 111 112 112 112 113 116 116 117 117 117 117 118 118 119 119 119

3 15 21 6 14 25 22 24 8 6 12 21 4 16 21 16 10 12 4 8 10 18 3 20 9 10 27

i

DANIELA VIGNUDELLI ANDREW SMITH TASIC SINISA-TASA TIM WALFORD RUDOLF SEIBERT GIANPIETRO GOZZI JOHN HEY OLEG BORODIN STEWART BRYANT DUNCAN WALTERS BOZIDAR PASARIC KPS KANG GARY ANDREWS DUNCAN WALTERS PAT SMITH TONY BOWMAKER IAN MACPHERSON OLEG V BORODIN GEOFF WOOSTER GERT DE GOOIJER LAURIE BOOTH

A HANG AGC CIRCUIT FOR CW RECEPTION VARIABLE BANDWIDTH CRYSTAL FILTER THE WURZEL 20/40/80m REGEN RX TWP-TUBE REGENERATIVE RECEIVER FOR LOW VOLTAGE OPERATION THE HIBRYDUS SYNCRODYNE RECEIVER FOR 14MHZ THE HEYPHONE MY FIRST QRP STATION THE MB7LF 136Khz REMOTE RECEIVER PROJECT THE SARDINE SUPERGAINER FOR 40M LAMBDA REGENERATIVE RECEIVERi THE TOFF SIMPLE SUPERHET RECEIVER THE SHERBORNE SURPRISE ­ A SIMPLE SUPERHET RECEIVER FOR 160/80/40 THE FORTYHET ­ A SIMPLE SUPERHET FOR 40M THE "BRUTE FORCE" RECEIVER FOR 160M THE CP20 14MHZ CW RECEIVER THE CERES RECEIVERS THE "MICRO-SCOPE" 20M DC RX THE MARSH RECEIVER AN 0-V-0 RECEIVER RECEIVER TO PC AUDIO COUPLER

A THREE CHIP SUPERHET RECEIVER FOR 80 & 40 BILL CURRIE

Transceiver Topics

Title

80 m QRP TRANSCEIVER ONE TUBE AMETEUR STATION COMPLETE 40-20m TRANSCEIVER EBOR 3.5 MHZ TRANSCEIVER HF TRANSCEIVER JU6 7-14 MHZ TRANSCEIVERi CW TRANSCEIVER FOR 20 MINATURE 40m PORTABLE TRANSCEIVER TUNBRIDGE SSB/CW TRANSCEIVER JU6 PLUS TMX TRANSCEIVER FOR 10 MHZ SNOWSHOE MOUNTAINEER 7 MHZ TRANSCEIVER 10 MHZ TRANSCEIVER QRP-4 TRANSCEIVER SUPER OXO ALL BANDS TRANSCEIVER TOT 20 TRANSCEIVER TRANSCEIVER IDEAS 20/20 TRANSCEIVER

Author

KEITH COATES C.ROCKEY KEITH COATES NORMAN SPIVEY JOHN McDONNEL JOHN McDONNEL FRANK LEE ROY LEWALLEN IAN KEYSER JOHN McDONNEL THOM DAVIS WES HEYWARD KEITH COATES JOHN SMITH GEORGE BURT PETER DOUDERA GIG DRAGULESCU PETER DODD

Callsign

G3IGU W9SCH G3IGU G3GWI G3DOP G3DOP G3YCC W7EL G3ROO G3DOP K8IF W7ZOI G3IGU SM6DWO GM3OXX OK1DKW YO6HQ G3LDO

Sprat

3 7 18 19 20 20 21 24 26 27 29 30 31 31 32 32 32 33

Page

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TOT 30 TRANSCEIVER TWINNYSET TRANSCEIVER FOXX TRANSCEIVER FORCE THREE 7 MHZ TRANSCEIVER LIAM 10 MHZ TRANSCEIVER PW DART AS A TRANSCEIVER ALL WEATHER (NOVELTY) SIGNALLER DC-30-P TRANSCEIVER TSC MK.I 40m QRP SUITCASE TRANSCEIVER 004 TRANSCEIVER MICRON 6 BAND TRANCEIVER KIT TRANSCEIVER FOR 80m 160m DSB TRANSCEIVER RIT FOR THE DSB80 TRANSCEIVER TSC MK.II TRANSCEIVER PHOENIX TRANSCEIVER ROCK'S FISHING BOXi TRANSCEIVER FOR 7/14/21 MHZ QSK-1 ONE TRANSISTOR TRANSCEIVER SUPERHET TRANSCEIVER FOR 20m 50 MHZ ALL MODE TRANSCEIVER 50 MHZ CW/RTTY TRANSCEIVER 50 MHZ D.C. TRANSCEIVER ARGONAUT MILLIWATTING AND MICROWATTS THE TOP 40 TRANSCEIVER THE VOXNOR NOTES ON CENTURY 22 SET UP FOR SPRAT 80m TRANSCEIVER BOOTS FOR THE UNICHIP TRANSCEIVER THE G3XBM 'PIPIT' 21 MHZ TRANSCEIVER THE 'IMP 'ALL BANDS TRANSCEIVER ALPHA 80m. C.W. TRANSCEIVER BOOTS FOR THE UNICHIP THE UNICHIP NOTES ON THE IMP 14 MHZ TRANSCEIVER I.R.T. REVERSAL 14 MHZ COMPACT TRANSCEIVER LCK UPDATE AND MODIFICATIONS THE 70 MHZ SINGLE CHANNEL FM TRANSCEIVER A STABLE SSB AND CW IF STRIP QRP TRANSCEIVER FOR 40m THE SSB TRANSCEIVER PROJECT SSB PROJECT RF BOARD BOPP 6 40m TRANSCEIVER CW TRANSCEIVER FOR 7 MHZ SSB PROJECT THE KITTEN TWO TRANSCEIVER CSP 14 MHZ TRANSCEIVER THE G3ROO CW/SSB PROJECT QRP CW FROM AN SSB TRANSMITTER CSP PA BOARD CONSTRUCTION THE KITTEN II BOARDS KITTEN PCB CONNECTION UPDATES THE OSTS 40MTR TRANSCEIVER A TWO BAND TRANSCEIVER KITTEN SYNTH KITTEN DIODE SWITCHED RF BOARD

PETER DUODERA HA-JO BRANDT GEORGE BURT FINBAR 'O'CONNOR HA-JO BRANDT RON MARSHALL S.GARNER JOHN BEECH MIKE MICHAEL JOHN McDONNEL GEORGE DOBBS FRANK LEE DEREK EDMUNDS ROD YOUNG MIKE MICHAEL CARL WOOD C.ROCKEY ARTHUR PARSONS BOB CULTER NINO PAGLIALONGA JOHN BEECH JOHN BEECH BOB CARTER CHRIS PAGE MIGUEL MOLINA PAUL HARRISON COLIN TURNER MIKE KING MIKE KING ROGER LAPTHORN NIGEL FLATMAN MIKE KING MIKE KING MIGUEL MOLINA GEORGE BURT BILL BINGHAM IAN KEYSER JOHN BEECH IAN KEYSER RICHARD IAN KEYSER IAN KEYSER MIKE KING FRANK LEE IAN KEYSER IAN KEYSER IAN KEYSER IAN KEYSER WALTER FARRAR G3ROO IAN KEYSER IAN KEYSER SIMON BALDWIN IGOR GRIGOROW IAN KEYSER IAN KEYSER

OK1DKW DJ1ZB GM3OXX EIØCF DJ1ZB G4GIQ G3WSL G8SEQ W3TS G3DOP G3RJV G3YCC G3MJW G4MQH W3TS G4XOG W9SCH G2PS N7FKI I7ZCZ G3SEQ G3SEQ G4VSO G4BUE EA3FHC G4VAM G3VTT G3MY G3MY G3XBM GØEBQ GØFUW G3MY G3MY GØEBQ EA3FHC GM3OXX G4WUS G3ROO G8SEQ G3ROO WBONQM G3ROO G3ROO G3MY G3YCC G3ROO G3ROO G3ROO G3ROO G3ESP G3RJV G3ROO G3ROO GØFRD UZ3ZK G3ROO G3ROO

34 34 35 36 36 40 42 42 42 43 43 43 44 44 44 45 46 47 49 49 50 50 50 50 50 50 51 53 53 53 53 54 54 54 55 56 58 59 61 61 62 62 62 64 65 65 65 65 66 66 67 68 69 69 69 70 70 71

12 9 13 3 12 16 17 4 9 11 17 3 3 18 8 8 8 4 18 13 36 36 6 30 10 21 23 6 7 12 8 6 11 10 5 12 23 4 27 28 29 25 28 29 15 4 32 32 21 24 5 25 27 27 14 14 20 21

KITTEN SYNTH VARICAP UPDATE TWO BAND TRANSCEIVER SPRAT 70 MODS KITTEN II MULTIBAND LOW PASS FILTER THE MICRO-80 MINI TRANSCEIVER A POLYPHASE EXCITER A SOLAR POWERED 40M TRANSCEIVER THE TARS SPECIAL ULTIMATE K.I.S.S. MULTI-BAND VALVE 10w QSK TRANSCEIVER MODIFICATIONS TO THE MFJ 9020 TRANSCEIVER THE B1000 TRANSCEIVER THE HEART OF THE FROGGY THE MALTA 40 THE MFJ-249 HF/VHF SWR ANALYZER - A REVIEW 7 MHZ QSK QRP CW TRANSCEIVER A VALVE TRANSMITTER AND RECEIVER FOR 80m THE NORCAL 40 TRANSCEIVER THE ANV 20SSB/CW TRANSCEIVER THE B.L.T. 14 MHZ SSB TRANSCEIVER (PART 1) THE CUB MULTIBAND CW TRANSCEIVER MK II THE B.L.T. 20/17m SSB EXCITER (PART 2) THE EPIPHYTE - SIMPLE QRP SSB TRANSCEIVER AN 80m CW VALVE TRANSCEIVER T2/R2 QRP SSB TRANSCEIVERS THE RAT THE GQ-40 CW TRANSCEIVER THE ZL2BMI DSB TRANSCEIVER i THE DIGIRIG 7mhz TRANSCEIVER CONVERSION OF LCK FOR 20M EP-2 PORTABLE 75M SSB TRANSCEIVER THE PA3BHK 80m DSB/CW TRANSCEIVER THE ROCK CRUSHER THE OPTIMISER QSK K.I.S.S. TRANSCEIVER THE G3TDZ 73kHz RIG THE VU MINI-TRANSMITTER (TRANSCEIVER) FOR 20m MY VERSION OF THE PIXIE 73 KHZ VERY LOW FREQUENCY TRANSMITTER RECEIVER THE ALVA - A SWEDISH PIXIE THE GQ2000 CW TRANSCEIVER - PART 1 A SIMPLE SSB TRANSCEIVER FOR 18 MHZ THE FOXX 2 - AN OLD FAVOURITE THE GQ2000 CW TRANSCEIVER - PART 2 THE REVIVAL [1947 - 1997] TRANSMITTER RECEIVER THE GQ2000 CW TRANSCEIVER - PART 3 THE GQ2000 CW TRANSCEIVER - PART 4 THE MAIDENHEAD PIXIE THE ELBC-40 : A KEYER CONTROLED CW TRX THE SUNSET TRANCEIVER MK2 A SIMPLE 21MHZ VXO QRP TRANSEIVER THE ELBC-40 : RECEIVER MODULE THE G3RJV SIX PACK THE SPARKFORD 80m CW TRANSCEIVER PTO DRIVES IN TEN-TEC TRANSCEIVERS I7PKY PIXIE 2 OK2PZL 7/14 MHZ TRANSCEIVER i THE FOXX-3 THE GQ-PLUS - PART 1

IAN KEYSER IAN KEYSER OLEG BORODIN JOHN R. HEY H.C.S SPENCER DERRICK G3LHJ ANDY CHRIS GARLAND IGOR GRIGOROW GEORGES SCHOLTES IGOR GRIGOROW OLEG BORODIN STEVE HUNT GEORGE DOBBS JAROSLAV BIK JOHNNY APELL WAYNE BURDICK SHELDON HANDS BYRON WEAVER STEVE HUNT BYRON WEAVER DERRY SPITTLE IGOR GRIGOW JOHN LIEBENROD DEREK BUNDEY ERIC SEARS K.P.S. KANG DAVID ROWLANDS DERRY SPITTLE ROBERT VAN DER ZAAL JOHN HEY TONY BOWMAKER JOHN R. HEY K.P.S. KANG DOUG DEMAW JOHN BEECH JOHNNY APELL SHELDON HANDS OLIVIER ERNST GEORGE DOBBS SHELDON HANDS PETER AKKER SHELDON HANDS SHELDON HANDS PETER HOWARD FRED HEUSY STEVE SPENCER CRAIG DOUGLAS FRED HEUSY GEORGE DOBBS TIM WALFORD BRIAN GIBBS PETR POKORNY DEREK ALEXANDER SHELDON HANDS

G3ROO G3ROO RV3GM G3TDZ G6NA G4VPM G3RJT UZ3ZK LX1BK UZ3ZK RV3GM G3TXQ G3RJV OK2SBJ SM7UCZ N6KR GW8ELR WU2J G3TXQ WU2J VE7QK RK3ZK K7RO G3JQQ ZL2BMI VU2KLA G6UEB VE7QK PA3BHK G3TDZ GØEBP G3TDZ VU2KLA W1FB G8SEQ SM7UCZ GW8ELR F5LVG G3RJV GW8ELR DJ0GD GW8ELR GW8ELR G4UMB DJ3KK G6NA G0HDJ DJ3KK G3RJV G3PCJ G3MBN I7PKY OK2PZL G4GVM GW8ELR

71 71 72 72 73 73 73 73 74 75 77 77 78 78 79 79 79 80 80 80 81 81 82 82 82 83 83 84 85 85 85 85 86 88 88 89 90 90 90 91 91 91 91 92 93 93 94 94 95 95 96 96 97 98 98 98 98

21 19 22 20 3 6 12 4 8 13 12 18 21 26 14 18 3 3 11 21 13 3 23 8 24 4 12 10 12 4 19 14 6 3 12 7 9 20 4 13 4 20 23 13 20 8 3 22 14 21 4 21 16 35 4 14 20

160M CROSS TOWN TRANSMITTER THE GQ-PLUS - PART 2 "Naxos" A MINIATURE 20M CW TRANSCIEVER NATTERBOX - A CRYSTAL CONTROLLED AM Tx. i THE HAMOEBA The CRACKER ­ A BASIC CW TX/RX FOR 40M DAT20, A 20M MINI TX/RX FOR SOUNDCARD MODES AN EXPERIMENTAL TRANCEIVER "ET1" THE SUPER SIXTY 5MHz Tx and Rx CONVERTER USING THE ELECRAFT K2 ON 5MHZ ­ PART 1 THE SMALL WONDER LABS PSK20 USING THE ELECRAFT K2 ON 5MHZ ­ PART 2 FOXX DUAL BAND SPECIAL A NEW LIFE FOR THE TS-870S

ALBERT HEYES SHELDON HANDS ANDREAS SEEREINER DAVE SMITH DUNCAN WALTERS RICHARD NEWSTEAD SHELDON HANDS GLEN YINGLING STEVE RAWLINGS DAVE SERGEANT PETER HALPIN DAVE SERGEANT JIM GAUSON ANDREA WEICK

G3ZHE GW8ELR OE6EIF G4COE G4DFV G3CWI MW0ELR W2UW GW4ALG G3YMC PE1MHO/ M3ECN G3YMC MM0CAE HB9FBD

99 99 104 104 105 106 106 108 114 114 114 115 115 115

4 21 4 18 4 3 21 20 3 6 14 10 12 24

V.H.F. Topics

Title

2 METRE 3W AM TRANSMITTER 2 ELEMENT 2 METRE BEAM 2 METRE FM TRANSMITTER 144-14 MHZ CONVERTER - PART I 144-14 MHz CONVERTER - PART IIi 3 ELEMENT HB9CV BEAM 5 ELEMENT QUAD FOR 2 METRES 2 METRE POCKET ZEPP ANTENNA 50 MHZ FM TRX MINATURE 2m FM TRANSMITTER 2 METRE PORTABLE ANTENNA 2 METRE WAVEMETER 2 METRE J ANTENNA SIMPLE 2 METRE CW/FM TRANSMITTER 2 METRE DC RECEIVER 2 METRE FET PRE - AMP 2 METRE PRE - AMP USING A LINER 2 ON CW 50 MHZ RX CONVERTER DUMMY LOAD AND POWER INDICATOR 2 METRE ATU WHITE ROSE 50 MHZ (6m) CONVERTER PROJECT XOGGY A 14 MHZ TTX ONE WATT VHF TRANSMITTER VHF/HF POWER METER 50 MHZ TRANSVERTER [WHITE ROSE] FET VFO FOR 70 MHZ 70 MHZ SINGLE CHANNEL PM TRANSCEIVER 2M AMPLIFIER SEQUENCE 70 MHZ TCVR ON 2M OR 6M VFO STABILISER SEQUENCE TRANSCEIVER PUSH TO TALK DOUBLE QUAD FOR 1.3 & 2..3 GHz 2 METER ATU BI-DIRECTIONAL AMPLIFIER 6m TO 2m TRANSVERTER

Author

JOHN DODD STAN PERCIVAL HA-JO BRANDT DAVID JOHNSON DAVID JOHNSON A.MORGAN JOHN STEVENSON HERBERT HANRIDER MIKE SHEFFIELD MIKE TOOLEY JOHN BEECH GEOFF GARDNER D.JENNINGS JOHN BEECH JOHN BEECH JOHN BEECH JOHN BEECH ERIC CALVERT JOHN BEECH JOHN BEECH DAVID AKRILL BRIAN HARRIS GORDON POPE HARRY POPOFF JOHN BEECH JOHN BEECH JOHN BEECH HARRY POPOV JOHN BEECH JOHN BEECH JOHN BEECH

Callsign

G8EPE G3BGR DJ1ZB G4DHF G4DHF G8PON G8ZRY DL7MAM ZL1ABS G8CKT G8SEQ G6MCZ G3ZAI G8SEQ G8SEQ G8SEQ G8SEQ G4EIC G8SEQ G8SEQ GØDJA G3XGY G3ASV LZ1BB G8SEQ G8SEQ G8SEQ LZ1BB G8SEQ G8SEQ G8SEQ

Sprat

5 12 24 26 27 29 32 33 36 36 37 37 41 42 43 44 45 45 46 47 49 53 53 55 55 57 58 60 62 63 66 67 76 77 79 85

Page

5 10 3 12 5 22 8 4 20 16 18 17 17 22 24 24 24 17 20 23 23 25 22 4 26 24 26 25 33 36 34 34 36 36 34 34

JOHN BEECH

G8SEQ

PL259's AT VHF LINEAR POWER MIXERS AT SHF LINEAR POWER MIXERS AT SHF A VHF ABSORBTION WAVEMETER THE EPIPHYTE-3

PETER CHADWICK

G3RZP

HARRY FROGGATT DERRY SPITTLE

G3SOX VE7QK

85 88 89 90 107

10 34 33 19 21

Transmitter Topics

Title

DSB1 - DOUBLE SIDEBAND TRANSMITTER PROLEGOMENA TO QRP TRANSMITTERSi TRANSISTOR 1 160m TRANSMITTER ROARIN MICK 80m TRANSMITTER DAILY TELEGRAF QRP CW TRANSMITTER SSB 80 TRANSMITTER TTL TRANSMITTERS A WATT PLUS ON 160 6K8 QRP TRANSMITTER MODS TO THE G3ZVC TRANSMITTER JUBILEE 80 SSB/CW TRANSMITTER MALIN HEAD TTX ONE KNOB 80m TTX 80 -160m TRANSVERTER PROLEGOMENA TO QRP TRANSMITTERS LAGOS QRPETER MINI TENER DSB TRANSMITTER FOR 10m FULL BK TOP BAND TRANSMITTER MAC MODED SUPER OXO TRANSMITTER CLASS A AMPLIFIER FOR THE TUNBRIDGE 10m VXO TRANSMITTER 160m MAIN STATION TRANSMITTER BREN 160m DSB/CW TRANSMITTER OXO ALL BANDS TRANSMITTER 80m TRANSMITTER BASED ON THE JU6 SINGLE VALVE 80m QRP CW TRANSMITTER SANTISTA TRANSMITTER 10 MHZ VXO TRANSMITTER BASIC VXO FOR 3.5 MHZ 18/24 MHZ VERSION OF THE LAGOS QRPETER 40m TTL QRP TRANSMITTER WEE RIG PHOENIX CW QRP TRANSMITTER REVERSE HYBRID 40m QRP TRANSMITTER STX TRANSMITTER GRILO 3 BANDS TRANSMITTERi VINTAGE VALVE TRANSMITTERS 40m MINI TTX TRANSMITTER NOR'S 20m TRANSMITTER 2 BAMNDS CW QRP TRANSMITTER PICCOLINO TRANSMITTER 80m VMOS TRANSMITTER ONE VALUE 3 BANDS QRP TRANSMITTER FAG BOX (0) TRANSMITTER ONER TRANSMITTER HOWES CTX80 KIT

Author

E.ELSLEY C.ROCKEY E.ELSLEY C.ROCKEY SEIGI HARI E.ELSLEY JOHN McDONNELL C.CARINGELLA DUG WOODFORD IAN KEYSER ART SMYTH FINBAR O'CONNOR HAROLD SMITH IAN KEYSER C.ROCKEY HA-JO BRANDT ART SMYTH IAN KEYSER IAN KEYSER BENELUX QRP CLUB ROY ROWNTREE COLIN TURNER GEORGE BURT PETER BRENT BRIAN BOOTH PAULO MOSER HA-JO BRANDT AL SANTUCCI HA-JO BRANDT JOSEPH LAURICELLA GEORGE BURT MAC McNEIL GEORGE BURT CARLOS ALAN LAKE LEONARDO BOSELLI NOR McINTISH DREW DIAMOND HA-JO BRANDT PAUL HARRISON H.ACOMB CHRIS PAGE GEORGE BURT COLIN TURNER

Callsign

G3YUQ W9SCH G3YUQ W9SCH DK9FN G3YUQ G3DOP G8IB G3ROO GM3XNE EIOCF G3IVF G3ROO W9SCH DJ1ZB GM3XNE G3ROO G3ROO G3ZQA G3VTT GM3OXX G4LEG G3SYC PY2TU DJ1ZB IOSKK DJ1ZB KL7JHM GM3OXX PAØFKP G3FCK GM3OXX PY2FNE G4DVW I5WOU GM3RKO VK3XU DJ1ZB G4VAM GM4CCV G4BUE GM3OXX G3VTT

Sprat

4 4 5 6 8 9 10 11 12 12 14 16 17 19 22 23 23 25 25 27 28 28 28 28 29 29 30 31 32 33 33 33 34 35 35 38 39 40 40 41 42 43 44 45 45 47

Page

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QRP 2 WATT TRANSMITTERi SSB TRANSMITTER FOR 14 MHZ 160m TRANSMITTER 80m TRANSMITTER THE DSB-1 ONE WATT 80MTR DSB TX PANN, SMLL TRANSISTORS FOR QRP RF POWER PHOTO & FOIL PATERN QRP80 QRP TTL TRANSMITTERS THE QRP 80 - A3.5 MHZ 2.5 WATTS CW TX A VXO DESIGN FOR 10 AND 14 MHZ PACKING THE UNIVERSAL TRANSMITTERi 10 MHZ, 1.5 WTT OUTPUT TRANSMITTER 80m 1W TX 3.5 - 3.7 MHZ CAR BOOT SALE SPECIAL TTL TRANSMITTER FOR 80 METRES OXO BOTTLE BOOSTER THE THREEFOR TRANSMITTER ALL BAND VXO TRANSMITTER BROADBAND AMPLIFIER OXO TX 40 METRE TRANSMITTER PIPPIN QRP TX USEFUL HINT FOPR VMOS. PA STAGES VANDALS VALVE TX 40m SSB GENERATOR THE G4RAW TAG TRANSMITTER 28 MHZ QRP TRANSMITTER 40m VARICAP DIODE VFO 10 MHZ TAG TRANSMITTER FO TRANSMITTERS SIMPLE 40m ONER TRANSCEIVER TOP BAND CW TRANSMITTER HUFF AND PUFF AUTO START KITTEN TWO SSB AND CW FILTER PEBBLE CRUSHER 2 THE WHITE ROSE TRANSMITTER COMPUTER BOARD 80m TRANSMITTER QRP LINEAR VALVE DC RECEIVER FOR 3.5 MHZ BAND CONSTANT LEVEL RF AMPLIFIER FURTHER NOTES ON VFO STABILITY THE FINGER TX. A FUN RIG THE LZ1SM VXO TRANSMITTER THE K4TWJ QRP PEN TRANSMITTER

R.MACKRELL FRANK LEE PAUL HARRISON GORDON POPE DOUG DEMAW

G3AEP G3YCC G4VAM G3ASV VE7QK W1FB DL1ZB

48 48 49 49 50 51 51 51 51 52 52 55 55 55 55 56 56 58 59 59 60 60 60 61 62 62 63 63 64 64 64 64 66 66 66 66 67 67 67 68 68 69 70 71 71 72 72 74 75 78 79 80 82 82 82 82 82 82

17 3 6 16 3 11 15 8 13 16 14 15 12 11 17 16 15 9 21 7 19 14 19 16 4 13 7 14 19 7 12 15 18 20 10 3 3 12 9 5 6 3 8 14 11 16 4 19 20 4 20 14 27 7 36 3 17 6

KEN MAXTED CYRIL MAY CRAIG DOUGLASS PAUL HARRISON DEREK SCHOFIELD PAUL HARRISON PAUL MONEY JOHN T COLLINS W.J.RICKETT GEORGE BURT PAUL HARRISON MIKE KING MIKE KING TONY EDWARDS DAMIR SIMUNIC BILL BINGHAM STEVE ORTMAYER HA-JO BRANDT OLEG BORODIN TONY EDWARDS STEF MIEWIADOMSKI IAN KEYSER DOUG DEMAUW JOHN R HEY STEVE ORTEMAYER BILL MOONEY B.A. BUTCHER MIKE HADLEY DAVE BENSON GEORGE BURT ANGEL DAVE INGRAM

GM4JMU G4PUU ON4KAR GØHDJ G4VAM G4UOV G4VAM G4UVA KN1H G8LOO GM3OXX G4VAM G3MY G3MY GM4BQA G3HNP G4RAW YU2RK G4WUS G4RAW DJ1ZB RV3GM G3HNP G3ROO W1FB G3TDZ G4RAW G3VZU GØILL G4TTX NNIG GM3OXX LZ1SM K4TWJ GM30XX W3TS G4HZJ W6EMT G4XHE F5JDG G3FCK G3FCK G4RAW G4RGN VU2KLA GØKJK

GEORGE BURT THE NAT TRANSMITTERi THE NAT TX SPRAT 71 CIRCUIT ERROR THE PHOENIX TRANSMITTER D.A. MICHAEL CHATTERBOX 160m A M TRANSMITTER LES JACKSON MODIFICATIONS HANDS TX1 TRANSMITTER SHELDON HANDS W6EMT 30M VXO TRANSMITTER ROY GREGSON THE SUNNY 40m TRANSMITTER COOK ST31 14 MHZ 10w CW TRANSMITTER ANDRE MASSLEYE A 30m QRP CW TRANSMITTER A W McNEILL A MONGREL MODIFIED FOR PI-NETWORK OUTPUT A W McNEILL TEN MINUTE TRANSMITTER STEVE ORTMAYER THE GREMLIN 20m CW TRANSMITTER DOUG GIBSON THE KLAT 40m TRANSMITTER KERAL L THE MONGREL QRP CW TRANSMITTER KEITH RANGER

G3BMO ONE VALVE TRANSMITTER THE POPPET QRP AM TOP BAND TRANSMITTER THE FROTH 10 MHZ 1 WATT TRANSMITTER SIMPLE COMMON PARTS 80m TRANSMITTER THE NORWICH TRANSMITTER THE NORWICH TRANSMITTER UPDATES THE SEASIDER 2 METRE CW TRANSMITTER A VALVE TRANSMITTER FOR 80 AND 40 METRES TINY TOP 160M TX 18MHZ WIDE RANGE CRYSTAL TRANSMITTER THE JBS TRANSMITTER 70 MHz BEACON TX. THE HB9BWY TRANSMITTER MIGHTY MITE THE DL93 TRANSMITTER THE MARATHON 136 kHz QRP TRANSMITTER VK7LF's 160m QRP TRANSMITTER A WATT ON 10 METRES ­ A SIMPLE RIG A SIMPLE CW TRANSMITTER THE FRESCO TRANSMITTER THE PP2 TRANSMITTER i OUR VERY OWN QRP BEACON A SIMPLE MODULAR DSB TX 12BH7A PULL-PULL TRANSMITTER FOR 30/40m THE MARV-1 TRANSMITTER QRP LINEAR AMPLIFIER USING CHEAP TRANSISTORS THE G3SYC BATTERY VALVE TRANSMITTER 17 METRES QRP CW TRANSMITTER THE SIX SOCKETS GEM A 3.5MHZ QRP TRANSMITTER WITH LINEAR AMPLIFIER COMPLIMENTARY PAIR PUSH-PULL RF POWER AMPLIFIER DIRECT CONVERSION WITH LED PRODUCT DETECTOR

BERT SPEED DOUG GIBSON OWEN DAVIES T.K. MANI BRUCE EDWARDS BRUCE EDWARDS BILL COOPER TONY TUITE STEVE ORTMAYER A.W. McNEILL GEORGE BURT JOHN BEECH NORBURT LITZ JOHNNY APELL STEVE RAWLINGS TOM VAN ANDEL REV KEITH RANGER MILAN CATARI KPS KANG GEORGE BURT VICTOR BRAND JACK PONTON HEHIKO KOMACHI GEORGE BURT HEHIKO KOMACHI BRIAN BOOTH LEON HELLER ARNIE CORO JOHNNY ASPELL STEF NIEWIADOMSKI RUDI BURSE

G3BMO G4RGN G4VPF VU2ITI G3WCE G3WCE G4CIA GW0NSR G4RAW G3FCK GM3OXX G8SEQ HB9BWY W3FQJ/KY8I SM7UCZ GW4ALG VK7LF G0KJK 9A9RA VU2OWF GM3OXX G3JNB GM0RWU JA9MAT GM3OXX JA9MAT G3SYC G1HSM CO2KK SM7UCZ

83 84 86 87 88 89 92 94 96 97 97 102 103 105 106 108 108 111 112 112 112 112 113 114 115 115 116 116 117 118 118

25 4 21 24 16 14 17 24 34 20 3 34 24 35 12 12 26 7 8 12 18 25 10 12 5 19 7 18 14 10 12 15

DK2RS

118

VIKING-500 POCKET (CW) TRANSMITTER FOR REYNOLD-A. KUNG 10MHZ THE MARSH TRANSMITTER GEOFF WOOSTER THE LAMBDAETTE ­ TRANSFORMERLESS AM QRP IAN LISTON-SMITH 160M TRANSMITTER

HB9CKR G3YVF G4JQT

118 119 119

22 6 19

SPRAT Errata Database.

SPRAT 1 (no date on cover) G2FWA product detector:

SPRAT 4 - Autumn 1975 W9SCH QRP transmitter circuit, top of page 12.

D2 was shown the wrong way round. It should look like this: The emitter resistor should be 1K. G3YUQ DSB1:The legends 160 - 80 on the buffer anode coil & switch should be reversed, i.e to include the 300pF on the 160 position. Mod from G8PG add 0.01uF between aerial connection on PCB and aerial terminal to avois possible shorts to battery. The IN plug is shown shorted to earth, and S1C is wrong. The ANT should go to the moving contact. Contacts 1 & 3 should be connected together, then connected to the aerial end of L1, and contact 2 should be joined to contact 2 on S1B. The capacitor (0.01uF) at L2A should not be tapped to that coil, but connected between the 12v end (86ohm res.) and earth. VR2 should be 4.7K. The inductance above L11 is an RFC as RFC 1 to 5. G3ZQA Kite transmitter. The + connection should be made to both outside contacts of the pole connected to the oscillator. The transmit mixer may appear to have the G2 of the dual gate Mosfet joined to the source resistor. This should be a "hump" rather than a "dot".

SPRAT 11/12 - December 1977 G3PLB ATU:

SPRAT 20 - Autumn 1979 JU-6 circuit (page 5), SPRAT 27 - Summer 1981 G4DFH 144 - 14Mhz converter

SPRAT 28 - Autumn 1981 GM3OXX Transverter.

SPRAT 34 - Spring 1983 Page 3. SPRAT 35 - Summer 1983 10 MHz transverter (page.7) SPRAT 35 - Summer 1983 Altern Rx circuit SPRAT 38 - Spring 1984 GRILO valve transmitter. SPRAT 38 - Spring 1984 DF4SG - Premix VFO.

The driver of the transmit circuit (2N3053) shows a ground connection from the top of one section of the 10t bifilar coil. This should be via a decoupling capacitor of 0.1uF Point "B" goes to the 2N3053 input at 0.01uF (p.8) Top coupling (say @ 10pF) required between the two sections of the input tuned circuits (across top of the two 22pF capacitors). We advise readers not to build it in it's current form. There are several errors in the article. The author advises that for better operation, another 1N914 and 10k resistor (as shown) should be added to ensure the xtal is off when in 10Mhz mode

SPRAT 45 - Winter 1985 160m Transverter

SPRAT 46 - Spring 1986 Fishin' box rig

SPRAT 47 - Summer 1986 Pocket Rx:

SPRAT 48 - Autumn 1986 Page 17, para 4 reads:

In the third paragraph, 500uA should read "500mA". In the last paragraph, 100uF should read 1000uF. There were two omissions from the circuit; The cap. coupling the RF amp to the mixer is 1nF, and the fixed cap. across L2 is 180pF. The resistor between the intermediate buffer and the second buffer is 4.7k Increasing the gate resistor in the Rx detector to 2M improves sensitivity by 6dB Lifting the gate lead off the tap, and onto the hot end of tuned circuit also improves signal strength. There should be joint at the junction of the 22K res. and the 10nF cap. above the base of the BF115. The emitter of the BC337 is shown the wrong way round, it should go to the top (junc. of 47uF and 220R The tapping for L2 should be about midpoint in the winding. "A 2N3504 or BFY51 gives more drive & power" It should read a "2N3504 gives more drive & power, but a BFY50,51 or 52 can also be used".

SPRAT 48 - Autumn 1986 Rock's test box. The transistor tester section, resistors should be shown as here:-

SPRAT 49 - Winter 1986 G3LDO - Page 14 SPRAT 49 - Winter 1986 The Tenor Rx: - Page 9 SPRAT 52 - Autumn 1987 Universal Tx circuit: SPRAT 52 - Autumn 1987 GM4JMU Hilltopper: SPRAT 52 - Autumn 1987 G3FCK 80m PA: SPRAT 63 - Summer 1990 Huff & Puff circuit. SPRAT 66 - Winter 1991 IC735 Mods. SPRAT 69 - Winter 1991 FE1MOG Keyer.

table 1 should read: a & B=3350/f, C=2370/f, D=700/f, E=1336/f. The table is correct in the original article (SPRAT 30, page 10). The lower winding of T1 should be centre tapped to earth for D1 and D2 to function. Link between top of L1 & 12v rail should not be present (it shorts the 220R res.) The PC board is correct. A better choice of trimmer would be 7-65pF

A 120pF fixed cap. should be shown between the output and the junc. of the two 100pF capacitors and the coil. IC2 Pins 2 & 10 should be tied to +5v as for pin 16

Line 11 ... running frequency (not trimming frequency) "Component X" is 22uF, not mF.

Pins 4,7 & 8 on IC2 are shown earthed - it should also show pins 9 & 12 to earth.

SPRAT 69 - Winter 1991 G7BCJ Phasing Rx.

SPRAT 71 - Summer 1992 The NAT Tx.

SPRAT 72 - Autumn 1992 Hertzverter builders SPRAT 72 - Autumn 1992 Page 21 - Meter Internal Resistance.

The base resistor of the 2N2222 should be 220k and should be connected to +5v, not +12v. Sideband select switch, the top L.H. 10k should be joined to the drain of the top 2N3819, not the source. On A.F. amp add +volts at pin 6, ground pins 2&4 LM386 The power supply to the VN66 devices goes to a centre tap on the coil L1, not L2. Also there is a dot placed on the junction of the gate of the bottom VN66 and the source-ground lead there is no connection there. Note error in pin numbering of NE602.

Set RVl such that the meter is around full scale on some convenient calibration mark, then connect resistors or a variable across the meter until it indicates exactly half the initial setting. There are then equal currents in the meter and the resistance across it as the same voltage is across both the external resistance [R1] and the meter resistance are of the same value.

SPRAT 79 - Summer 1994 VK2AW Minicom receiver. SPRAT 85 - Winter 1995 Epiphyte-2 SPRAT 87 - Summer 1996 A Spectrum Wavemeter - G4WIF SPRAT 90 - Spring 1997 G3SEQ 73kHz Tx/Rx:

There should be a connection from the 5v rail to pin 4 on the MC3357. The 100R & o.o1uF on the RHS, can be deleted. See also Sprat 81 page 22. Numerous errors, too long to document here. See SPRAT 88 page 22.

SPRAT 93 - Winter 1997 G3MFJ "adding CW to the EP2".

D3 should be OA91. In the circuit the line between R6/R7, and C5/C6, are not joined. C9 was changed to 270pF (better response) and R11 was removed, but still listed. It has been found that the band pass filters in the TX (& probably Rx) suffer from instability. Fit 10nF - 100nF capacitors to pin 3 of the IC's to cure. Also feedback cap. in the low-pass filter should be reduced from 100nF to 10nF. There is a 1nF capacitor missing between pin 3 of the 741 and the earth rail.

SPRAT 94 - Spring 1998 CORRECTIONS TO THE BANDBREAKER RECEIVER

Figure 3. The VFO - The 100n capacitor shown in the gate of the MPF102 should be omitted (it appears between the 100K resistor and the 1N914 diode on the original drawing. Figure 2 had the pin numbers missing from the MC1496 and the 741 ICs. The numbers

are as shown. SPRAT 95 - Summer 1998 On page 13 G6NA Stereo filter. the component values were incorrectly shown. The inductors were 2.2mH & capacitors 22uF.

Sprat 98 Page 5 OK2PZL Tx/Rx SPRAT 104 ­ Autumn 2000 - page 20 Natterbox.

There was a section missing from the circuit. This is downloadable from the club website or obtainable as a SPRAT reprint. 1. The RF PA input stage, there should be a link between the zener diode anode and the 27 ohm resistor leading to the bias adjustment. 2. The T4 requires a link and a 0.1uF is required above T5 3. The PTT changeover switching (page 23), the bottom end base resistor is shown as 3.6Kohm poses no real problems in performance, a 4.7Kohm was used, and is a common value (the range 2K2 to 10K should work). The wire sizes for the coils were given in cm and not mm. See SPRAT 107 page 29 for further information.

SPRAT 105 ­ Page 26.

SPRAT 107 ­ Page 25

Modification by DF1GN. Norbert noticed some problems with oscillation if varying the frequency over 450Hz. The supply current was rising, raising the voltage at R9 (1K) so the voltage at R4/5 decreased. Norbert solved this by changing R9 to a 78L09 regulator.

SPRAT 108 ­ page 19 L - type ATU SPRAT 108 TX

Unfortunately, the top left drawing on 50 ohms is wrong. In order to have a balanced output (with reference to the SAME TX ground) the TX coax shall be connected with the screen to the middle of the balun and the centre conductor to one side of the balun. The text is OK. (Jesper, OZ1XB). SPRAT 109 ­ page 6 The frequency finder. 1. The frequency finder should be powered from 6 volts regulated supply. 2. Paragraph 6 "wound" should read "sound". 3. Paragraph 7 second last sentence "Inductance is now 253 (freq squared)" should read "Inductance is now 253/(Freq squared)". The author 9A9RA has pointed out an error in the input attenuator. The sections have not been joined in the diagram.

SPRAT 109 ­ page 3 HF Selective micro voltmeter

SPRAT 111 ­ page 4 Lambda Oscillator The error is that the connection "A" should be to the collector of the BF509 rather than the base as shown. Also, more obviously, there should be a chassis symbol on to the bottom line.

SPRAT 111 ­ page 4 QRP Zero beat indicator C1 is 0.15uF as correctly shown in the diagram ­ not 15nF as shown in the component list. There should be a 2.5mH choke from each of the grids on the acorn valves to ground. C9 is removed from the Cub. I used its pads to mount components. (I had to check the circuit and double-check by removing the cover.) Sorry for not making this clear. Something that came to light recently on my 30 metre Cub with Ken's mod [SPRAT 112], was a VHF oscillation. This was quite hard to detect, but manifested itself by the tuning not being completely smooth, having one or two glitches. A small ferrite bead (FX1115 or similar) on one leg of the crystal cured it, and all's well. The '612 can operate at hundreds of MHz so it's not too surprising. I fitted the bead to my 20 metre Cub as well. - lan Braithwaite G4COL

SPRAT 112 ­ PAGE 9 PP2 Transmitter SPRAT 114 ­ PAGE 16

VXO conversion for the 20m MFJ Cub

SPRAT 113 page 16 Lambda Regenerative Receiver 9A2HL has informed me of two errors in the diagram. The left side of P2 must go to ground and the |bottom of LI must go directly to the left side of S-1. The drawing shows the corrected section of the circuit diagram.

SPRAT 83 ZL2BMI PA An appendix to the article.

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