Radio Communication
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JULY 1968 Radio Communication JOURNAL OF THE RADIO SOCIETY OF GREAT BRITAIN KW2000A SSB TR A NS CEIVER The finest value available, with no extras to buy. 180 watt PEP operation on all amateur bands 10-160m, complete with AC psu: VOX control: crystal calibrator: KW EQUIPMENT Independent receiver tuning: Upper lower sideband tuning: Top band included: Automatic linearity control on transmit: Special attention to TVI proof- IT'S BRITISH ing. There are alternative crystals available for full coverage of the 10 and 15 arrive bands. KW 201 AMATEUR SANDS CO M MUNICATIONS RECEIVER Now with two detectors. I. product detector lor SSS and C W, ii. diode detector tor A.M. The KW201 has been specifically designed for optimum performance on KW VESPA MK II Single Sideband. Eleven ranges give coverage in the amateur bands irom Melts to 30 McIs bands. A mech- KW 1000 TRANS MITTER anical fitter gives an IF selectivity ol 31 kcis at 60db. LINEAR AMPLIFIER Transmitter for all H.F. Bands, 220 watts PEP. SSS. and 6 kcis at 60db. A ..CI" multiplier is available 1290 watts PEP complete with built In PSU and SWR AM CW now in full production complete with PSU - giving a variable range of et itcts to 200 cycles indicator. selectivity, Write for illustrated detailed specification on all the above OTHER K W PRODUCTS KW ANTENNAE and our list of KW Tested, "Trade-in" equipment. KW E-Z ANTENNAE MATCH UNIT KW PEP METER K W MATCH SWR INDICATOR K. W. ELECTRONICS LTD. K W LOW-PASS FILTER K W TRAP DIPOLES 1 HEATH STREET DARTFORD ' KENT ELECTRONICS K W BALUN K W DUMMY LOAD LIMITED TELEPHONE: DARTFORD 25574 • CABLES: KAYDUBLEW, Dartford K W 0 MULTIPLIER ii RADIO COMMUNICATION JULY, 1968 RADIO COM MUNICATION ASSISTANT EDITOR Trevor R. Preece, G3TRP EDITORIAL ASSISTANT 434 QTC David A. Evans, G3OUF 436 A SIMPLE SOLID STA TE SIDEBAN D SEN DER W. B. Hartogg, G3JEJ CONTRIBUTING EDITOR 440 A SELECTION OF COAXIAL CONNECTORS Pat Hawk' G3VA Mrs K. M. Priestley, G3XIW 444 TECH NIC AL TOPICS DRAUGHTS MAN Pat Hawker, G3VA Derek E. Cole 449 THE IDEA BEHIN D GB2L0 Sylvia Margolis ADVERTISING 449 PANEL FINISHING MANAGER 450 A FRES H APPRO ACH TO TVI Mrs P. D. 1-1,11,,oy M. Margolis, G3N MR EDITORIAL 453 TENTH REUNION OF THE RA DIO AM ATEUR OLD TIMERS' OFFICE ASS OCIATION RSGB Headquarters 453 LOOKING AHEAD 28 Little Russell Street, 454 NORTHERN RADIO SOCIETIES' ASS OCIATION CON- London, WC1 VEN TION 01-405 7373 01-405 2444 455 THE MONTH ON THE AIR John Allaway, G3FKM ADVERTISING 460 FOUR METRES AN D DO WN OFFICE Jack Hurn, G5U M Sawell and Sails Ltd., 466 MINUTES OF THE SOCIETY'S 41st ANNUAL GENERAL 4 Ludgate Circus, MEETING, 1967 London EC4 FLE 4353 467 IT'S CO MING ON. PROGRESS REP ORT ON THE SOCIETY'S NE W HEA D QU ARTERS 468 RA DIO AM ATEUR EMERGENCY NET W ORK S. W. Law, G3PAZ 469 SOCIETY AFFAIRS RADIO COM MUNICATION 470 CONTEST NE WS (INCORPORATING THE RSGB BULLETIN) 472 CONTESTS DIA RY IS PUBLISHED ON THE FIRST 473 LETTERS TO THE EDITOR WEDNESDAY IN EACH MONTH BY THE RADIO SOCIETY 474 CLUB NE WS OF GREAT BRITAIN AS ITS 478 MEMBERS' ADS OFFICIAL JOURNAL AND 487 INDEX TO ADVERTISERS SENT TO ALL MEMBERS c RADIO SOCIETY OF GREAT BRITAIN, 1968 CLOSING DATES AUGUST 12 JULY JULY 1968 SEPTEMBER 6 AUGUST VOLU ME 44 No. 7 INDIVIDUAL COPIES 4 -. HEATHKIT NEW H W-17 2-METER AM TRANSCEIVER >irItY.ill* 2 ,11:1,“ rfe•Nens,vp. DEXE TP EO NSI DTE£D 1P0 ,97 0E. NT PLA N . Total credit £ 6 9.2 KIT 9 Price m onthly pay ments £6. 19. £73. 0. 0 Another new Heathkit transceiver . this time it's a power input and an AM power output of 8 to 10 solid-state 2-Metre AM job that's just right for local watts. Modulation is automatically limited to less ragchewing, NETS. DX, than 100°,. A front panel selector switch chooses any ... reasonable power of four crystal frequencies or an external VFO (the output. sensitive receiver, easy-to-use features, and Heathkit HG-10B VFO at £21 15s. is perfect for a low price tag. this job). The Heathkit 11W-17 in detail. It's really a separate Front panel controls include Final Load, Final receiver and transmitter in one compact, versatile Tune, Crystal-VFO switch. Main Tuning, Squelch package (the only common circuitry are the power with ANI switch, Battery Saver-Receive Transmit- supply and the audio output/modulator). Frequency Spot switch: rear panel has S-meter Adjust. Head- coverage is 143.2 to 148.2 MHz. The solid-state dual phone jack. Power socket. VFO power socket. VFO conversion. superheterodyne receiver with a pre-built. input. and Antenna connector (50-72 ohms, un- pre-aligned FET tuner has a lighted dial with 100 kHz balanced). calibration, automatic noise limiter, squelch, and I uV The 15 transistor, 18 diode. 3 tube circuit is pow- sensitivity. Selectivity is 27 kHz at 6 dB down, a ered by a built-in 120/240V AC supply. Circuit board figure that's consistent with band occupancy and easy construction averages 20 hours. It's all housed in a receiver tuning. The front panel meter indicates re- low-profile Heath grey-green aluminium cabinet meas- ceived signal strength and relative power output. A uring 14f," W x 6r H x 8r D with everything in 3-position switch on the front panel has a " Spot " place. A ceramic PTT mic. and a gimbal bracket for position for finding the transmit frequency on the mobile mounting are included. tuning dial, a Receive/Transmit position, and a Move tip to 2 metre 'phone operation this new low Battery-Saver position that conies in handy during cost way with the Heathkit HW-17. those long periods of monitoring while mobile (the receiver draws only 8 watts during this time). A Kit IMW•111, 211,4 Transcever. 17 lbs. P.p. 10 6 3" x 5" speaker is built in. £69.2 On the transmission end is a hybrid circuit in- cluding transistors and valves, with an 18 to 20 watt Kit ilWA-17-11, TransleorIced DC er11114. 5 lbll £13.19 Up 6 - Dept RB-7 'For ait en q u.rtcs plo a9c\ DAYSTROM LT •, GLOUCESTER ENGLAND Tel: 29451 426 RADIO COMMUNICATION JULY, 1968 HEATHKIT Amateur Radio Equipment DEFERRED CREDIT TERMS BY ARRANGEMENT (OVER £10 U.K. ONLY) H W-t00 5 Band SSB-C W Transceiver . 8040 Metre coverage. SB-101 80 Through 10 Metre SSB Transceiver . 180 watts 180 watts input PEP SSB, 170 watts input CW. Crystal filter. Built-in PEP 558.. 170 watts CW (the practical power level for fixed/mobile 100 kHz calibrator. TALC. Fixed or mobile operation with HP-23 or operation). Features USBiLSB on all bands, PTT & VOX. C W side. HP-13 power supplies. tone, and more. Unmatched engineering and design. Kit H W-100 £125. Ready to use price on request. P. & P. 1016 Kit SES-101, 23 lbs, (185.12.0 Ready to use L215.11.0 P. 8i P. 91.- 1111111111111111111111111111.111111111111111,011I11111S1111111.1111111111111101111,111111111ilillilli1111111111111111Ell1111011111111111111111111111:111111111111111111111 11141111111114111111111111MI111111111111111111111111111111111111111i111111i11111111.11111111111111111111111111111111111111111111111,1111111111l1111111111111119 1111111 S13-640 External LM O for SI3-101 . Provides Linear Master SB-301E A mateur Band Receiver . SSB, AM. CW and RTTY Oscillator frequency control or either of two crystal controlled fre- reception on 80 through 10 metres 15 MHz VVWV reception. quencies for a total of five frequency control options. Power supplied Tunes 2 metres with SBA-300.4 plug-in converter. from S13-101 Trans. Kit SB-301E, 23 lbs. (les: speaker) £140.12.0. Ready to use £170.12.0 P. & P. Kit SB-640 9 lbs., L51.6.0 Ready to use E56.6.0 P. & P. 6/- I irilliIIIIIIIIIIIIIIIIIIIIIIIIiiiillilli11111.:1111111i11111111:11111111111181111i111111111111111111111i181811;110:11:1111111111111111111111111111111illi "I r. v ;:[1, I 1[11114111 GR•64E Short Wave Receiver . Covers 1MHz to 30 MHz, plus 550 KHz to 1620 KHz AM band. Many special features for such a modest price. For 115, 230v, 50/60 Hz. A.G. mains operation. SE-401E A mateur Band SSB Transmitter . 180 watts PEP Kit GR -64E E22.9.0 Ready to use E19.9.0 P. & P. 9/- SSE, 170 watts CW on 80 through 10 metres. Operates " Transceive " GC-ILI " Mohican " G I Coverage Receiver . 10 eran. with 513-301—requires SBA-404-1 crystal pack for independent opera- sistors. 5 diode circuit. Tunes 580-1550 KHz and 1.69-30 MHz in tion. 5 bands. 6" 4' speaker. Kit SB-401E, 34 lbs , (157.10.0 Ready to use (191.10.0 P. & P. 10/6 Kit GC-IU [37.17.6 Ready to use E45.17.6 P. & P. 10/6 SBA-401-1 crystal pack. 1 lb. E17.3.0 NC I I I 0111 ou Il HEATHKIT - Please address all moil order enquiries to: DAYSTROM LTD., Dept. R13-7, GLO UCESTER Enclosed is L PP extra. Please send model(s) RG-1 High Sensitivity General Coverage Receiver . High Please se id FREE Heathkit Catalogue. performance at lowest cost. Covers 600 KHz to 1-5 MHz, 1.7 MHz to 32 MHz. Full specifications available. NAME Kit RG-1. 18 lbs., £9.16.0 Ready to use £53 P. & P. 9/- RA-1 Amateur Bands Receiver . Covers 10-160m. Halfilattice ADDRESS crystal filter at 1.6 MHz. Switched USB and LSB for SSB. Provision for fixed, portable or mobile uses. Prices and specifications subject to changes without notice.