7+( -2851$/ 2) 7+( *4 53 &/8% - Low Power Amateur Radio

1 SPRAT7+( -2851$/ 2) 7+( * 4 53 &/8%'(927(' 72 /2: 32:(5 &20081,&$7,21,QGH[ * 453 &/8%,668(6 WR 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 VHF Topics SPRAT Errata DatabaseAuthor: Tony G4 WIFi- Indicates a correction in a later SPRATATU's andAccessories AccessTitleAuthorCallsignSpratPageATU UNIT FOR THE HW7 KEITH SIMPSONG4 DQF212 THE ROCK THE MISTERY OUT OF ATU'SGUS TAYLORG8PG69 SIMPLE ATU FOR QRP TRANSMITTERSHA-JO BRANDTDJ1ZB74 ATUJOHN WHITEG4 BCY108 QRP SWR INDICATORGEORGE DOBBSG3 RJV1211 THREE WAY ATUiRON HOWEG3 PLB126 SUGGESTED ATUDAVE DABINETTG4 DEP1814 WATTMETERGEORGE BURTGM3 OXX2213 QRP Z MATCH ATUGEORGE BURTGM3 OXX2514NO COST ATUTONY HAASG4 LDY285 BREN TX ATUCOLIN TURNERG3 VTT326 TUNED BULAN ATUALAN CHESTERG3 CCB333 SENSITIVE MICROWATT METERWES HEYWARDW7 ZOI383 SWITCHED ALL BANDS QRP Z MATCHFRANK LEEG3 YCC385 BENELUX QRP CLUB ATU409 ANTENNA CHANGEOVERGUNTER DENGLERDL1HS4117 ATU FOR THE FOXX TRANSEIVERDONALD YOUNGERW2 JEK4583 WATTS OUTPUT Power METER FOR THE HF BANDSIAN BRAITHWAITEG4)))))]

2 COL4818 WELZ Power METER505A RESISTIVE BRIDGEBYRON C WEAVERWU2J512350 MHZ REFLECTOMETER/ATUBRIANG3 SYN5427 ONER AERIAL CHANGEOVER UNITIAN KEYSERG3 ROO563A RELATIVE S METER AND Power METERBILL BARTLETTG4 KIH578 SENSITIVE FIELD STRENGTH METERG4 VSO585A BI-DIRECTIONAL INLINE WATTMETERDAVID STOCKTONG4 ZNQ6112A BATTERY AND SWR INDICATOR WITH A DUO-LMATHEUS VOLKERTDF4SQ6326A QRP DUMMY LOAD IN SMDBILL FOR NOVICEDAVE GOSLINGG NEZ6833A REAL QRPp VSWR METERHA_JO BRANDTDJ1ZB697 FURTHER NOTES ON THE QRPp VSWR METERHA-JO BRANDTDJ1ZB7115NO COST ATU MKIIGUSTAV MICHALIKDL6 FBQ7110 THE SUPER TEE ANTENNA MICHAELW3TS728HF SINGLE COIL Z MATCH ATUPETER LINSLEYG3 PDL7617 YALATU (YET ANOTHER L ATU)PETER BRODRIBB7621A ONE KNOB ATU & SWR BRIDGENIGEL GOLDSTRAWG DTQ7710 ALTERNATIVE CORES FOR THE STOCKTONWATTMETERMIKE CZUHAJEWSKIWA8 MCQ7711A QRP ANTENNA TUNERERNEST M HELTONW8 MVN7817 THE G4 RGN "ZZ" GIBSONG4 RGN789 ANOTHER Z MATCHROBERT VAN DER ZAALPA3 BHK8614AN IMPROVED ROCK-O-NATOR ATUCHAS BRYANTGW3SB8815 LIPSTICK NO COST ATUALAN GRAYG4 UEC898A VERSATILE PEAK OUTPUT Power ONER STOCKTON WATTMETERDICK PASCOEG0 BPS9118 SIMPLE LED SWR BRIDGEJOHN YOUNGG0 WQR9315A CLASSIC Z MATCH ATUGEORGE DOBBSG3 RJV9414 IMPROVED MINI-ATUHA-JO BRANDTDJ1ZB9425A BALUN FOR THE LDG AUTOMATIC KISS HF OSCILLATOR FOR TEST QUIET TUNER [BASED ON THE STOCKTONBRIDGE]

3 TONY LYMERGM0 DHD9712 IMPROVED MINI-ATUHA-JO BRANDTDJ1ZB9711 LDG TUNER BALUN UPDATEFRANK BRUMBAUGHW4 LJD977A HIGHLY SENSITIVE ABSORBTION WAVE METERAAA TECHNICAL STAFF9830 THE LARKHALL - TO 50 MHZ ANTENNACOUPLERTOM SORBIEGM3 MXN9930A COMPACT DIRECTIONAL COUPLER FOR THEQUIET TUNERTONY LYMERGM0 DHD10015A PRACTICAL Z-MATCH ATUBEAR HORNLA4KG10218 BALANCED ATU MODTOM SORBIEGM3 MXN10326 GETTING TO GRIPS WITH YOUR FIRST EVERLONG WIREAAA TECHNICAL STAFF10428 ATU COILS "TO SHORT OR NOT TO SHORT"?AAA TECHNICAL STAFF10430 LOW PROFILE 160M ANTENNATERRY YOUNGK4 KJP106275/8thGP ANTENNAS FOR 20,15,10 & 6 METRESSTEVE ORTMAYERG4 RAW10633 HOME BREW LADDERLINESEAB LYONAA1MY1077 THE TRUE STORY OF LIMPY ARNOLDGEERTG/PE3 GRT/MM10711 FUN ON LONG WAVE BUT IS IT QRP?STEVE RAWLINGSGW4 ALG10718 THE GIBRALTAR SPECIALG. SMITHZB2GS10728AN EFFECTIVE L-TYPE ATUiJESPER FOGH BANGOZ1XB10818 TOP BAND ANTENNA WITH REMOTE ATUJESPER FOGH BANGOZ1XB10917 ANTENNA CHANGE OVER CIRCUITALAN UPTONG3 UZU11019 MULTIBAND LOFT ANTENNA FOR 40/20/15/17/10 STEVE NICHOLSG0 KYA1119 SOME TOP BAND IDEASPAT SMITHGW0 VMR1111120M QRP ANTENNA TUNER UNIT & 20M MINILOADED DIPOLEGUIDOIK2 BCP11115 THE RE-PETE TUNERFRED BONAVISTAK5 QLF11126 THE CARLTON PORTABLE ANTENNA MATCHINGUNITSTEVE RAWLINGSGW4 ALG1143 DIGITAL SWR DISPLAY FOR Power METERSALAN ROWEM0 PUB1149A TUNABLE BANDPASS FILTER FOR ALL BANDSTASA SINISAYU1LM11516 THE G3 EJS 2-TUNERSTEVE WARWICK-OLIVEG3 EJS12312 EXPERIMENTAL Z-MATCH WITH AN EXTRATWITCHHENRY KAIPERTDJ6ZF12332A SIMPLE SWR BRIDGEGEORGE BURTGM3 OXX1249A LOOK AT LOW PASS FILTERSGERALD STANCEYG3 MCK12424A VERSATILE ANTENNA COUPLERGUS TAYLORG8PG12528 BALUN

4 SWITCHER & FEEDER STRAPPERIAN BROWNG3 TLH12612 PHOTONIC ANTENNA ORIENTATION DEVICETONY LYMERGM0 DHD12618 ANOTHER ANTENNA TUNING SYSTEMPAUL DEBONO9H1FQ12726A BALANCED ATU WITH THE BALUN FIRSTGEORGE BURTGM3 OXX12822 ANOTHER ANTENNA TUNING SYSTEMPAUL DEBONO9H1FQ12824A FINE TUNE L-MATCH ANTENNA COUPLERGUS TAYLORG8PG12828A REMOTE AERIAL CURRENT PROBEIAN BRAITHWAITEG4 COL1293 MODS TO G3 EJE s TUNERDEREK ALEXANDERG4 GVM13016 ACTIVE AERIAL USING AN OPERATIONALAMPLIFIERHA-JO BRANDTDJ1ZB13019 TRANSMATCH MODIFICATIONSJIM BRETTG0 TFP13127 MINI ATU WITH TOROIDJOHN BEECHG8 SEQ1326 BALUNSDICK ARNOLDAF8X13216PI T MINI HF ATUJOHN EARNSHAWG4 YSS13318 REMOTE ANTENNA SWITCHERDAVID LONGG3 PTU13418A VOLTAGE, CURRENT OR HYBRID BALUN?HA-JO BRANDTDJ1ZB13712Z MATCH MODIFICATIONPAUL DEBONO9H1FQ13715 PHI-C MATCHING NETWORKJESPER FOGH BANGOZ1XB13826A SWITCHABLE BALUNCOLIN TURNERG3 VTT13928MY FAVOURITE VSWR BRIDGEMITCHELL LEEKB6 FPW14025 Accessories antennaTitleAuthorCallsignSpratPageLOW Power SWR INDICATORGEORGE DOBBSG3 RJV17 PRODUCT DETECTOR FOR QRP USEiEDGAR JANESG2 FWA13 VFO NETTING CIRCUITGORDON BENNETG3 DNF16 CMOS FILTERGERRY FARRANCEG3 KPT513 Power PACK FOR QRP WORKGEORGE BURTGM3 OXX65 ACTIVE FILTERGEORGE BURTGM3 OXX103 CHEAP CW FILTERDES VANCEGI3 XZM1017 QRP Power PACKDUG WOODFORDG8IB115 PIN DIODE ATTENUATORIAN KEYSERG3 ROO1213 PORTATEST FOR /P WORKGUS TAYLORG8PG1213 SIMPLE SPEECH TRANSISTOR AUDIO FILTERSDES VANCEGI3 XZM155 MAX BOX SURPLUS CRYSTAL CHECKERMAC McNEILG3 FCK1713 CRYSTAL CALIBRATORDAVE POWELLG3 ZXK20137 MHZ CRYSTAL BENDERMIKE

5 PRIORG3 XMI2113 ODD FREQUANCY XTAL CALIBTATORCOP MACDONALDVE1 BFL217 ACTIVE AUDIO FILTERHAROLD SMITHG3 IVF2315 GDOIAN KEYSERG3 ROO241420m DX SKED KEEPERDAVE SMITHG4 JIM267 CRYSTAL AND FREQUENCY CHECKERCHRIS WARWICKG8 DSO2910 HIGH PERFORMANCE CW FILTERED WETHERHOLDW3 NQN323 HIGH IMPEDENCE DC VOLTMETERBRIAN BOOTHG3 SYC393CW CRYSTAL FILTERADRIAN KING453 PEAK READING RF PROBEREG LYDDONG4 ETJ467 HELPING HANDWALTER FARRARG3 ESP4822 ROCK'S TEST SQUEEZE KEYERMATT VOLKERTDF4SQ488 HOOK ON SNIFFERRONNIE MARSHALLGM4 JJG515A LINEAR SCALE CAPACITANCE METERDOUG GIBSONG4 RGN5212 ANTENNA RF CURRENT TRANSFORMERKEN MAXTEDGM4 JMU5210HF BANDS CONVERTER FILTERIAN BRAITHWAITEG4 COL527 PIN DIODE ATTENUATORBILL WRIGHTGOFAH528 SUPER PORTABLE KEYER PADDLEBRUCE PRIORVE7 CKF5213 TOP BAND ROCKEYW9 SCH5223 UNIVERSAL SIDETONE MODIFICATIONWALT LEGANKA4 KXX5215 REGENERATIVE AUDIO FILTERDEREK MONDAYG3 HKD539 THE ONER KEYSERG3 ROO534 THE VFG SIDEKICK KEYERG4 VFG5310A TEETER-TOOTER LO FOR DC TRANSCEIVERSDOUG DEMAWW1FB5419 AUTOMATIC T/R SWITCHMIKE KINGG3MY5415 BFO OSCILLATOR USING A MECH/CERAM FILTERJOHN BEECHG8 SEQ5426 ONE STACK FILTERED WETHERHOLDW3 NQN5420100 KHZ CALIBRATORBRIAN GIBBSG3 MBN5513AF & CLIPPER FOR THE 10 TEC ARGOSY IIBILL WRIGHTG FAH5514 SIMPLE SIDETONEPAUL HARRISONG4 VAM5512 STANDARD CAPACITOR 7 ELEMENT L,P,FILTERSED WETHERHOLDW3 NQN551375 OHM ATTENUATOR FOR 50 OHMGERALD STANCEYG3 MCK568A VERSATILE VXOFRANK LEEG3 YCC567 HOME BREW DOIDE MIXERSROBERT V D ZALPA3 BHK5611 TOWARD A MORE LINEAR DIODE TUNINGGEORGE W.

6 ALLENNIBEP561274HC4066, A NOVEL LOW COST AUDIO FREQUENCY SHIFTERC arter, BobG4 VSO5714 CRYSTAL HAWKINSG CEU5728HI Z MIC ADAPTORMIKE MICHAELSW3TS5718A TTL LOGIC PROBEKEN FILTERB randt, Ha-JoDJ1ZB587G FILTERSROY LEWALLENW7EL5814 THE BEST AUDIO FREQUANCY 4 SW RECEPTIONGERDDJ4SB587A POCKET BFO/CIO USING SMD5913 THE G5IC THRESHOLD GATE NOISE LIMITERGUS TAYLORG8PG5914 THE ONE FOR ALL BATTERYKEN CRAVENG4 LKP5921 TWO TONE OSCILLATORIAN KEYSERG3 ROO599A 7TH ORDER LOW PASS FILTERDAVID STOCKTONGM4 ZNX6214 UNIVERSAL PSUMIKE KINGG3MY629A CHEAP VFO SOURCE FOLLOWERRONNIE MARSHALLGM4 JJG6318 AUDIO PREAMP AND PASSIVE FILTER 4 NE602 STEF NIEWIADOMSKI634 SIMPLE ONE-TOROID AF FILTERJOHN T COLLINSKN1H6311 THE DISCO McNEILG3 FCK6312 THE HUFF AND PUFF RE-VISITEDSTEF MIEWIADOMSKI6320AN OSC IND FOR REGENERATIVE RECEIVERSRODNEY SEYMOURG1 TNE6425 COIT AUDIO AMPMIKE KINGG3MY6418 CRYSTAL CHECKERMARTYN LINDARS648 QSK IDEASBILL LEASKG4 CEO6416 SIMPLE ZENER TESTERMARTYN LINDARS6419 WATCH IT-HUFF&PUFF REVISITED (PART 2)

7 BASTIAN EDELMANPA3 FFZ6413A LOW DRIFT, LOW DISTRIBUTION VFOJOHN R HEYG3 TDZ653CW TRANSMITTER TESTERSTEF MIEWIADOMSKI6518 HUFF AND PUFF REVISITED (3)BASTIAN EDELMANPA3 FFZ6526 ROLLER COASTER TURNS INDICATORSTEPHEN PUTMANN8ZR6511A SIMPLE GDO COIL COUPLERM arshall, RonnieGM4 JJG6612CW FILTER REVISITEDE delman, BastianPA0 FFZ6619G4 ERA AUDIO CW FILTER6626 NEAPOLITAN SMD VFO KITG eorge DobbSG3 RJV661624 VOLT RELAYS ON 12 VOLTSJOHN HALIBURTONGM4 AQO6824G FILTERS A PRACTICAL LOOKFRANK LEEG3 YCC6831 THE FREQUENCY ADAMKEN RUIZG4 SGF688A WIDE RANGE 80 MTR VFOHA-JO BRANDTDJ1ZB7016 SIMPLE CW FILTERPETER BRODRIBBG3 ONL7011 SIMPLE LINEAR PA FOR 160-10 MLEN DIXONG3 XXQ707A FET VOLTMETERKEN BUCK7120 IMPROVED RF SNIFFERRONNIE MARSHALLGM4 JJG7116S METER DRIVERDEREK MONEYG3 HKD7110A SIMPLE RF DETECTORANDY STAFFORDG4 VPM7213 INDUCTANCE METERDOUGLAS GIBSONG4 RGN726 WIDE RANGE VXOs for 80 40 20m and 10 ANGEL GERASIMOVLZ1SM7226A SIMPLE FREQUENCY COUNTER FOR DC RCVRSGRAHAM ADCOCKG4 EUK7310 JAW-TYPE CURRENT PROBEHa-Jo BRANDTDL1ZB73175 WATT LINEAR AMPS FOR THE WHITE ROSEJOHN R.

8 HEYG3 TDZ744A CHEAP OSCILLATOR IDEADERRICK PRICEG3 LYU7416A PCB PAD CUTTERROY DEANEG4 FQQ7421A SIMPLE CHANGEOVER SYSTEM FOR NOVICEUSEDAVID GOSLINGG NEZ7410A SIMPLE SOLDERING AIDPETER BRODRIBBG ONL7419Q-METER OR SIMPLE COIL MEASURING CIRCUITJAN-MARTIN NOEDINGLA8AK7416 SUPERIOR 7mhz CONVERTER FOR THE WHITE ROSE743 THE PUFFERWALTER FARRARG3 ESP7412A SIMPLE SPEECH PRE-AMP AND CLIPPERROD CRADDOCKGW4 SLK7525A STABLE RELAY SWITCHED VFOFRANK LEEG3 YCC7516 COIL WINDING AIDROY SMITHG IWU7525 REDUCING ICOM RIGS TO QRP POWERFRED BONAVITAW5 QJM7524 SIMPLEST DIAL AND DRIVELENG3 XXQ7519 SOLAR PANEL AND BATTERY MONITORJOHN PEARSG FSP7517 WHITE ROSE DIGITAL DISPLAYJOHN R HEYG3 TDZ753A SSB GENERATORDEREK PEARSONG3 ZOM7624A DSB GENERATOR USING THE NE602 GRAHAM ADCOCKG4 EUK769 DUAL BAND XL MIXER FOR THE CHERITONTRANSCEIVERGRAHAM ADCOCKG4 EUK764 FREQUENCY COUNTER USING THE 7224 CHIPJOHNNY APELLSM7 UCZ7612 THE TOKY VFOKEN BUCK7615UB40 JIG - POORMAN S SOLDERING AIDPETER McBEATH762040m FIXED CAPACITOR XO SWITCHINGMAC McNEILG3 FCK77167 BAND MIXER VFOIAN BROWNG3 TLH773 QUICK DUMMY LOADALBERT HEYESG3 ZHE7725 SIMPLE AUDIO COMPRESSORRICHARD STOYLE7717 SIMPLE HEADPHONE ADAPTOR FOR USE OF HI FI PHONESDAVID GOSLINGG NEZ7734 THE TOM PSUKEN RUIZG4 SGF777 UNIVERSAL SEMI-QSK & SIDETONE BOARDJOHN EVERINGHAMG4 TRN7719 VERSATILE AMPLIFIERFRANK LEEG3 YCC7717 VLFB SEQUENCE CW DE TOROF1 NTT7715A 50 MHZ EXCITERPETER BRODRIBBG3 ONL787A NO COST AUTOMATIC ATTENUATOR FORTS120 VDAVE EVANSG4 YND7810A SIMPLE CRYSTAL TESTER ( 100 KHZ - 20 MHZ )

9 JOHNNY APELLSM7 UCZ789 ALTERNATIVE CORES FOR THE STOCKTONWATTMETERMIKE CZUHAJEWSKIWA8 MCQ7810 ANALOGUE SOLID STATE SPEECH RECORDERPAUL LOVELLG3 YMP783 AUDIO PREAMP AND AUTOMATIC LEVEL CONTROLDICK PATTINSONVE7GC7815 CERAMIC RESONATOR VARIABLE OSCILLATORREV SUTERVK6SA7816 SIMPLIFIED TEETER-TOOTER VXO FOR RITMIKE CZUHAJEWSKIWA8 MCQ7811A SIMPLE AUDIO "S METER"MARCO ELEUTERIIK VSV7922 ANTI HISS IDEAS FOR LM386 AUDIO AMPLIFIERSDAVE REDFERNN4 ELM7923 CONTROLLED CHARGE SYSTEM FOR NICAD CELLSRUDI WOLFDL2RM7922A SIMPLE HELIPOT SUBSTITUTEJOHN YOUNGG7 BCJ8019 INTERNAL EXTERNAL PTT SOCKETJOHN BEECHG8 SEQ/VK2XY8037 TRANSMIT RECEIVE CHANGEOVER SWITCHJOHN BEECHG8 SEQ/VK2 XYD8037KK7B SPRAT TECH CARTOON #1 LO PHASE SHIFTNETWORKRICK CAMPBELLKK7B8120 THE LINEAR AMPLIFIERBYRON C WEAVERWU2J8118W3 NQN SEVEN ELEMENT LOWPASS FILTER8135A 5 WATT AMPLIFIER FOR THE EPIPHYTEDERRY SPITTLEVE7QK8218A VFO FOR THE EPIPHYTEDOUG HENDRICKSK16DS8221 QRP QSK CIRCUITJOHN BEECHG8 SEQ8237A DIGITAL DISPLAY FOR THE EPIPHYTEDERRY SPITTLEVE7QK8322A LOW BUDGET HIGH PERFORMANCE CW AUDIOFILTERROELOF BAKKERPA RDT8320A Power ATTENUATOR FOR HF USEDAVE PENNYG3 PEN8311 LAKE AF2 AUDIO FILTERFRANK GREENOUGHG4 EHY8318 SIMPLE MODS FOR THE KANGA FREQUENCYCOUNTERFRANK GREENOUGHG4 EHY8318 TOROIDS FOR THE GM4 JJG RF SNIFFERC W HARLOW8318A NICAD CHARGER FROM THE CAR BATTERYNORMAN BONNETTDL6 NEE8415AN RIT CIRCUITTONY LANGTONGM4 HTU843 BITE FOR THE QRP SPIRITGUIDO GIANNIHB9 BQB8416 BNC TO PL259 ADAPTERROBERT VAN ZAALPA3 BHK8414 CLASS A BROADBAND AMPLIFIERMARCO ELEUTERIIK VSV8426 FLEXIBLE IMPEDENCE MATCHING FOR W3 NQNAUDIO FILTERSDAVE PENNYG3 PEN8425 HIGH EFFICIENCY RE