¥olume56 january to december 1980 .......8,3 mar. 83 apr. 75 may. 81 june. 67 july. 71 aug, . u '...

¥olume56 JANUARY TO DECEMBER 1980

r

¥olume57 JANUARY TO DECEMBER 1981

COMMENT Bilings? ... .

Wh'en All Else Fails . 'Pot: :; . ; . . . . . . ... .. .............. .... . .. . 'Round the Clock ...... .... ......... ... .. . . .. . . .... .

::::: ::: :.:: :::::::::: . .• .•. Cracking c$he C9de .,:;; ............ ; ..... . .. . . . , .. . .

,;:"Who's Kidding Who.? .. .. :, . ......... . .. . ....... . ':.+ ·' .• for .6iH .... , ........ .... ................... .. .. ..

.. Va'lue for Money .... .... .. . ...... . . . . . . .... .. . . .. . .. .

. Patience ' ... ...... ..... ... .. : ... . .. . ... : .. ..... .. . . . . '·il,.: Freedoml ... .. . . ..... : .. ;:, ... ... .. ,0 .:.; .. .. . . .... , ••••• '. i:"" ,' .. ' " ' _·C.. ,

CONSrRucrIONAL-. General •

',;:: " , r,2,," CON"SJ:RUf;TI(f)NAL-" TeSt Equipment

TedNield , . . , . 33 Sept ,t, Comparator by A. J . Birkenshaw . .... 20 May J:;;, 'jf:; ''Twy na 11,:(' Dig.tal!Analogue Multimeter. r'":''',''''' bY·M. Tooley& D. Whitfield ..... . . "., . Part 2 32 Jan

Kindly Note 25 Apr Part 3 24 Feb

Ici,ftheMONTH byB. Dance 7 14 Precision Op.Amp, . . .. . .. . .. .

TL080 BIFET Op, Amps ... .. .. .. . . ......... ... ... . Plessey SL631 OC Audio Amp . .. . ... . ...... . . . . . . Hitachi HA11225 & Tako KB4441

FM Receiver Devices' ......... ....... ..... : .. .. J .. ',

27 Feb 47 Mar 31 Apr

25 Sept

Bands by A. E Dowdeswel/ .. .. .. ... 77 Jan. 74 Feb. ,·j:"fiF 76 Apr. 67 May, 73 June. 57 July. 62 Aug.

.,; 63 Sept. 71 Oct. 69 Nov. 65 Dec MVY;,Broadcast Bands by C. Mol/ay .. ..... .. .. 79 Jan. 78 Feb.

, 82 Mar, 78 Apr. 70 May. 76 June. 62 July. 64 Aug. 65 Sept. 74 Oct. 71 Nov. 69 Dec

S'i\(\,E\roi3dcast Bandsby C. Mol/ay . . . .... .. ... 83 Jan. 80 Feb. · 83 Mar. 80 Apr, 74 May, 79 June. 65 July, 68 Aug.

" 67 Sept. 77 Oct 72 Nov. 70 Dec ' RonHam .. : .... .. .. . , . 86 Jan, 86 Feb, 88 Mar. 87 Apr.

80 May, 83 June. 71 July. 73 Aug, 71 Sept. , 'i", 80 Oct, 79 Nov. 72 Dec

VHF Barl(:js by Ran Ham .... . . " . . ..... ... .. . ... 85 Jan. 83 Feb. .8,3 Mar. 83 Apr. 75 May. 81 June. 67 July. 71 Aug,

. u ' 69 Sept. 79 Oct, 7.5 Nov, 71 Dec

GENEIIALINTEREST Air J est (user reports on sets and sundries)

'A,R'245 '2m Hana-heid Transceiver .... . . . . . . Daiwa CN-630 SWR and Power Meter . ... . IDaiwaCNA- l 00 1 Automatic ATU .... . . . . . . DaiwaRM-940 Infra-red Microphone .... .. Drae Stabilised Power Supplies .. . . .. . . . . . .. . .

. Counter .. . .. .. .... . . -Icom IG-24G 2m Transceiver . , . ....... . . ... .

Scanning Monitor . . ..... . . . . . .. . ·Scanning Monitor . . : .. ....... .

I'v'todules VHF Antenna Matching Unit. Wavemeter .. .. ... .. .. .. .. . ...... .

/ t'JlicrQwave Modules MMT432/144

67 Apr 22 July 40 Dec 67 Mar 34 June 68 Apr 35 June 65 Feb 26 Qct 22 July 29 Sept

48 Nov 65 Feb 67 Apr 68 Mar 26 Aug

31 Jan

23 July 67 -Mar

All Cha-nge! Ther-Jew Emission Codes .. .. , . •... Amateur Radio arid the Disabled ...... ... .. ... .. Amateur Repeaters by J. M . Fell . ... .. .. . Part 1

Part 2 Assessing the New RAE-The First Two Years

by Arthur Harada . . . ... ....... .. . . ... .. ... .... . . Audio Power Amplifiers by M . J . Darby . . Part 2

" Part 3 Basics of TV DXing by Roger Bunney ... . Part 1

. Part 2

24 Aug 56 Dec 18 'June 40 July

44 May , 34 Ma'r 26 Apr 25 Jan 20 Feb '

Follow-up 34 Dec CBUK-The Home Office Statement . .. .. .. .. . 18 ' May Computers in Radio

by Mervyn J . Axson .. ........ .. .. .. .. ... Part 1 34 May Part 2 51 Ju'ne

, Part 3 52 Aug Constructor's Sketchbook . 49 Jan. 56 Feb, 40 Mar. 58 June Dear Sir . .. by H. A. Crookes .... ... .. ........... 24 Apr Designing with RM Cores byJ. B. Dance ... . .. 58 Mar Echoes of the Past by Elaine Howard . .. ..... . .. 45 Mar Hotlines by Ginsberg (recent developments

in electronics) . ...... . ........ .... .... .. ..... 67 June. 31 Sept IARU Region Conference Report

by Geoff Arnold ............ ... ............ . .. . . . In Control by Dick Ganderton . ...... ............ . Introducing RTIY by Jeff Maynard ... .... Part 5 Introducing SSTV by Mervyn J. Axson ... Part 1

Part 2 Part 3 Part 4 Part 5

LCCalcu l,ations Simpl ified by G. P. Stancey ... Mobile Suppression Techniques

by John M. Fell .. ............ ............ Part 1 Part 2

Mods by Roger Hall (suggestions on modifying amateur equipment) .... ... ... . .. .. .. . ... No. 3

No.4 No. 5

Kindly Note No.6 No. 7 No.8 No. 9

No. l0 No. 11

NiCad Cells- Their Uses and Abuses by John Wilson . . . .. . ......... . .......... .. .... .

Passport to Amateur Radio by John Thornton Lawrence ... ........ Part 1

Part 2 Part 3 Part 4 Part 5

Radio Specia l Product Report Grundig Satellit K 1 00 General Coverage Receiver ................. .. Icom IC-451 E 70cm Multi-mode

Transceiver .; .... ... . ... . . . ......... ......... . Standard C58 2m Multi-mode Transceiver . Standard C78 70cm Transceiver ... .. .. . . . . . . Tono 6- 7000E Communications Computer. Trio TR- 7800 2m FM Mobile Transceiver .. Trio TR- 8400 70cm Transceiver .. .... .... .. . Trio TS-830S H F Transceiver ..... . ..... . ... . Yaesu FT- 290R 2m, Multi-mode Portable .. Yaesu FT- 707 HF SSB Transceiver .... ......

Simple Regenerative & Super Regenerative Receivers by Lundahl .... . . ... ... .... . . . . .

45 Qct 62 Apr 39 Jan 41 Aug 20 Sept 48 Qct 67 Nov

Dec Dec

32 60

44 Apr 58 May

43 Jan 37 Mar 61 Apr 45 May 46 May 22 June 22 Aug 51 Sept 55 Nov 48 Dec

20 Qct

18 Aug 36 Sept 64 Oct 24 Nov 50 DeG

49 Sept

52 July 32 Nov 56 june 62 May 66 Jan 62 Oct 58 Aug 24 Dec 22 May

27 July

Practical Wireless, December 1981

, .

Special Product Report RTVC 12 + 12W Ampl ifier Kit ... .. .. . . .... ... 50 Jan

Suppressing and Protecting Thyristors by8enJ. Duncan .. .... .... .. ........ .. .. Part 1 27 May

Part 2 36 June Part 3 34 Aug

The Craziest Ever Radio Set by Eric Westman . 23 Sept The Key to Morse by Tony Smith .. .. .. .. . Part 1 55 Oct

Part 2 36 Nov and by Elaine Howard . .... . Part 3 29 Dec

Uncle Ed's page . . . ..... . .... 59 Jan, 41 Feb. 33 Mar. 23 Apr. 55 May. 39 July. 39 Aug. 61 Oct. 3 1 Nov

Understanding Receiver Parameters by Peter Chadwick .. ......... .. .. .. ..... Part 1 34 Feb

Part 2 70 Mar Using 2 metres byJ. M . Fell .. ........ .. .. .. .. ... 48 May Using 70cm by Dick Ganderton & John M. Fell 32 Oct VHF Mobile Antennas by D. O. White . ... . . .... 54 Sept YL Column by Elaine Howard .. . . . . ,62 Jan. 33 May. 52 Sept

KINDL·Y NOTE ,.- .... -.. , ',;-.--., .

Active Anttmi1'a. Mar .1981

SOcii Counter. Apr 1981 .. ... .. . . Chart. Mar 1981 . .. ... . . .

. ' ;:Helford',' !;\'SSSB Tran5:ceiver. ,A.pr 1981 . .... . ,'. Mods '1 98Y: : .. ..... : ... ... .. .... .... . . Tape/Slide f ontrol)er.Jl;tn/ Feb ,1981 . . . . . . . ... . "Twynha'm::'bigital/Analbgue Multimeter.

' Ja'n 198 '- . . ........ .. .. . .... : , ....... ...... . .... . .june ;J 981 . .. .. , ..... ...... . .

' '1' ,_)t]':,' '.:/ -:i> ' ; Points articles in previous vollfmes

:

Waters & Stanton Electronics-TVI Filter .. .. . . Waters & Stanton Electronics-Welz Meters .

30 July 57 Nov 21 Apr

SUPPLEMENT etc Gifts West Hyde Tools . ....

West Hyde Developments- Frequency Allocation Chart .......... ........ .... Mar Kindly Note 25 Apr Economy Keyboard Case . .. .. . ........ . ... ... .

W ildermain Ltd.-Photo QSLCards ... .... . . .. . 64 Jan 30 July · 20 Apr

Oatacard- 2m Repeaters ......... . ....... .. . .. .. . May Wintjoy Ltd.-VHF Base Station Antennas . .. . Datacard-70cm Repeaters ........ .... .. .... . .. Oct Wrenpro Systems- Datacard-HF Band Plans .. ............ ......... Nov

Index " Slim Jim Super" 2m Antenna .. ... ..... . .. . . Zaerix Electronics-"Tubox" Cases ........ . ... .

22 Apr 37 Oct Volume 57 Jan-Dec 1981 ............ ........ .. . 77 Dec

Special Featul'es Taking the Lid Off CB ...... .. .... .... .... .. .. ... .. July Glossary of Radio Terms. ... . .. ... .... . . . ..... . ... Nov/Dec Special Offers

MISCELLANEOI.!S "Exe" Parabolic Dish ... 47 June. 23 July, 73 Sept. 76 Dec News-News-News . .'. 18 Jan. '18 Feb. 18 Mar. 33 Apr.

19 May. 25 June. 24 July. 40 Aug. 18 Sept. 24 Oct. 64 Nov. 49 Dec

Obituaries

Volt-Check Test Probe ............ .. .............. 50 June Tools Offer ... ... . ... .... . . . .... .... . ........ ..... . . 63 Dec

Roy Stevens MBE G2BVN ...... .. .... ........ 69 Dec Out ofThin Air .. .. .. .. .. .. 64 Mar. 64 Apr. (l3 Aug. 47 Sept

RAE Reprint Coupon .. .. .. .. .. .......... .. .. .. .. .. 88 Apr

Readers' Letters . ... .. ..... 42 Jan. 34 Apr. 29 Oct. 55 Dec Things People Say . . .. .. .. 24 Jan. 23 Feb. p9 May. 29 Aug.

54 Aug. 73 Aug. 63 Oct . 84 Oct. 62 Dec

.SHOW REPORTS

PLEASE MENTION PRACTICAL WIRELESS WHEN REPLYING TO

ADVERTISERS A Visit to Chalk Pits Museum byAlan 27 Mar PWat Breadboard 80 ............ .......... .. .... . 50 Mar

Every month is the right frequency When you're building a major project from .a PW design, you want to be sure of getting every issue in sequence! Use this order form for a year's supply to be posted to you, ANNUAL SUBSCRIPTION RATES (incl. p & p) U.K. and Overseas £13 .00. Airmail rates for overseas subscriptions can be quoted on request.

r--------------------prac •• cal I IIRIll88 SUBSCRI PTION ORDER FORM , . Please send me Practical Wireless each month for one year. I enclose I a Sterling cheque/international money orderfor,... .. (amount) . I PLEASE USE BLOCK LETTERS , NAME Mr/ Mrs/ M iss _____ _ ________ _ _ _ __ _

I ADDRESS I POSTCODE ________ _ I Make your crossed cheque/MO payable to IPC Magazines Ltd .. and I post to : Practical Wireless. Room 2613. King's Reach Tower, Stamford Street, London SE1 9LS. L ___________________ _

80 Practical Wireless, December 1981

Volume58 JANUARY TO DECEMBER 1982

COMMENT Frustration .......... . nieUnexpected ..... ; Test Questions .........•... . .. .. . . .. . .......... ,,,'" De-Metrication ...... .. .. " ............ .. . .. ........ . Dis~~ter Averted? .. . .. : .............. .. ......... : ' ~ Waltmg .... ............. ;"., ..... ... .......... " .... ~ . : : At the Shows ... ... . ... ; .. •... .. ..... .. .... : . . i . ;:-. First, the Bad News .. :,",,,,,,:: ............... : : . :1.; ., .. First, the Bad News (11) .. .... ........ ..... : : . : .. .. Progress ... ........ .. ... . .... . .. .... .... ........ ,." .. . W(h)jther Amateur Radio? ................ .. . : ... Our Society ... .... . .... : ..... ............ .. . . ... ... .

19 " Jan " 19 Feb 19 Mar 19 Apr 19 May 17 June 17 July

i 17 Aug" 17 Sept 19 Oct' 17 Nov 17 Dec

'CONSTRUCTlb'NAL-Gff"iJ,;"j OX Dipole for Restrict'edSites by D. J. How~.. 40 FM Mains Intercom by NickAllen-Rowlandspn 35 LED Audio Level Meter by R. A. Penfold . . . : .. .. 29 Mini "X" Beam for 10 Metres by F. C. Smith.. 25 Mobile Radio Alarm by Stephen Ibbs .. . ... . ... . 56

Kindly Note 44 " Morse Practice OscillCltprl>v Jeff Mayhard. .... : ;"",,60

MO"rseShoVv by Steve tJamon ....... : .... Partl 46 , Part '2 ' 49

The 27MHz CB Radio Antenna KindIYr:!Q:te. 22

Mar May Sept Mar Apr

"May Jan July Aug , Nov

by F. C. Judd ...... ' ..................... ; Pait 1 " Part 2

" 3V Audio Amplifierby/i'.,tt. Penfo~d ... " .' .. ' c'

19 June 58 July 46 June

144MHz Ring-baseAJit~nna "'. '.-:;" . by F. C. Judd .. ... , .. :i;-............ .... .. ~ . . Part1

,Part2 20 Sept 590ct.

CONSTRUCTIOJYA'L.~Recei:ving Add-on Squelch by P. A. Julian .. .. .. ,, " . '!l:~ .,,: ·\~ 50 · Dec' A DXers' Notch Filter oyG.S. -Maynarc;f .'; >:.:;;" 20 July Amateur Tv Up-converter ' . .

by John Thornton-Lawrence ........... : .... ; . 20 Apr Synchronous Detector by R. Myers ...... Part 2 3.1 Jan "Winton" Stereo Tunfjr by E: A. Rule ... : Part 4 . 25 Jan'.

Part5 .47 Feb , P~r;t6.", 61,

3 ~B'(md Short WaveC6~'vertef , ,,~;,,~':J" by R. F. Haigh .. ~, ... ; ......... ; ... . .. .. . ' .. P~rtJ 58 .,' ,, . . ,Part 2 44

28MHz Pre-amplifierjby-!effHarris ....... : ...... 34

CONSTlllJCTIONAL-Transmitting Iambic Key~(:6 ff Maynard .. . "L .. : .. : . .... .. . 50. M'ar

. ·R F Operated 'R . """, ater Time-out Alarm bV Ted Nield . f .': :................................ 26 Nov

"Stour" Top-BanC! Transceiver Follow-up by A. K. Denyer ... ....................... :.. ..... 29 " Nov

" cONSriftic.TIONAL-Test Equipment "'r' "" '-:, ") , .",;,_~~',~};\;;;:;!;;>;.:, _>." " .,'., . " •

,"Cranb'orne"f3()()'Y'Hz Frequency Meter byStephenlbbs; ........................ Part 1

" Part 2 Part 3

FrequencySynthesiser by Mirko Vozn/ak . ... . . Modulated Wav~form Generator

by G E:off /!or,no./d.: : . .' ..... ~ .. ..... .... . ' .. .. ..... . Quadmet~r{.o, · . "L,; R ichards . .•. , .. ',' ........... . RF Nois"e Brid y:E A. Rule ..... ; .. : .... , ...... .

KindlyNote

ON THE AiR

44 Sept 30 Oct 48 Nov 22 Aug

29 Feb ·26 June·, 44 ,Jan 41 Mar

E Dowdeswell ..... . ... 62 Jan, 65' Feb, ~n;,:~;: c,,,,', , 1\,"';-,60, May, 62 June, 62 July, 62 Aug,

58 Sept, 64 Oct. 56 Nov, 5~Dec :C. Mol/oy .67 Jan, 70 Feb; ia Mar, :

oO ··~J;lri :!~~'. I'!I(3ly; 64 June, 65 July, 67 Aug, 63Sept, 71 Oct, 61 Nov. 58 Dec '

SW Brc)adcasitBanl:lsby C. Molloy .. 68 Jan, 71 Feb, 74 Mar, : 67 Jli ne,69 ~uly, 6B Aug, 64Sept, '

', 72 Oct, 63 Nov, 60'Qec' ~ari.?~~~,.·tL9~?:t!~?~ .... 71 J9n. 75 Feb, 75 Mar; 7.f:1Apr;'

'"01:1, ·dUlne:· 70 July,69 ·Aug,Q6~ept;'j.~ ·Oc:t)cl"· :' . l",' 64 NpY.' f3il{ Deg",>;" • 76Feb, 79 ,Mar,72 Apr,}:3:rylay,

, 72 July, 73 Aug,'70 Sept,,7aGct, 71 Nov .. 66 D~c '

ICi!f~lJeMO NrHbYi!:~ CJ~n,cf; Natiohal:~~miCQnduct6r LM 10 Op.,A:n'p .. and '

Voltage, ;Regulator . . .. ... . . ' .. : .... . . . ... :;, .... . Plessey SL'6600C t .m. Lf./demodulator device Plessey SL6640/SL6650 . . . .. .................. . Plessey S'L6691 t.m. device ....... .. ............ .

GENERAL INTEREST AirTest (user reports on sets and sundries)

~earCat 100FB Scanner .......... ' ...... ..... .. DraElIi.h.f. Wavemeter ....... ... : .... . . . .. . .. .. . leom IC-4E 430MHz Hand Held ........... .. Lowe SRX30D h.f. Receiver ......... .. ...... . Lowe UL-l 000 Loop/ Pre-amplifier . .... .. , . . M icrowave M odu les M M L 144/1 OO-LS

Linear ...... .. . ... .. . .. ' . . , , ..... . . .. .. .. ' . ... . Mjcrowave Modules MM 1296/144

Transverter . . .. ... ... . ... ..... ... . .. ' ....... . . MuTekSLNA 144s Pre-amplifier ........ ..... . Plustron TVR 5D Radio/TV . ... . ... . . ; ... ... .. . . SabtrbnicS 2037 A a.m.m. Kit ........ ...... .. . SMC-HS358 70cm 3-elementColin,ear .. ;. Sota SCL 144PS 2m Linear Amplifier .: . .... . Telereader CWR-685 ... . .... . . ... .. . . . . .. , .. .. Yaesu FT-208R/ FF708R Hand-helds .... ..

A New YL by Anja Simpson-Fraser ..... .. ..... . . Are the Vbltages Correct?

by Roger Lancaster ......... ..... ........ Part 1 Part 2 Part 3 Part 4 Part 5 Part 6

';' ,. Part 7 Basic oSOs in French by G. W. Roberts. Part 1

Part 2 Call for Help byA. Smith .. , .... ......... .. .. .. , .. CB Operating Impressions

byG ordon J. King .. ...... ~ ............ .. Part 1

CBHigCheck

Kindly Note Part 2

Commlron CB-40F ... . . , ... .. . ..... " . : ' ...... . qybeFnet 1000/3000 . .... . .... . .. .... : .. ; ... . . Lowe TX-40; Realistic TRC- 2001;

Uniden Uniace 100 .... ...... : ............. .. T andy TR C- l 001 H1lnd-heid .... .. .......... .

Computers in Radio-Contests by E. A. Parr . .. ' From Spark to Space by Ron Ham ... .... . , .... .

Happy 60th Birthday Auntie! " by Eric, Westman ... . .. .. .. .... . ..... . ..... .... . How theB.BC Beat the BlitzbyChas. E. Ill/iller

" Ide~s Dept. ..... ... ... . ...... , ...... ;'. .... ....... . .. . C" lfYop Can't Beat Them by Shelaghlbbs .. ; .. ..

., JFET Crystal Oscillators by M. J. Darby . . .... . . Modifying the JVC 3040 UKC TV

by Roger Bunney .. ... , . . . . . ...... ..... .. .. . ... . , Kindly Note

Mods by Roger Hall (suggestions on modifying amateur equipment) .... .............. . No. 12

No.13 No. 14 No. 15

72

. No. 1'6 No. 17 No.18

42 Feb 57 June 48 Sept 52 Nov

57 Sept 59 Jan 25 Nov 59 Apt 58 Apr

56 Sept

56 Mar 60 Aug 25 July 61 Aug 59 Jan 26 Feb 42 June 46 May 31 Dei:

44 June 41 July 19 Aug 24 Sept 27 Oct 34 Nov 34 Dec 38 June 54 July 20 Mar

40 Sept 22 Nov 22 Oct

39 Feb 46 Aug

52 May 67 Mar 34 June 49 June 56 Aug 44 Nov

18 Dec 52 June 60 Mar 55 Aug 36 Oct

48 Apr 23 Sept

43 Jan 25 Feb 42 Mar 29 Apr 32 Aug 37 Nov 46 Dec

.... ,"' ......

Passport to Amateur Radio' by John Thornton-Lawrence .. .. . . ... .. Part 6

Part 7 Part ·8 Part 9

Part 10 Radio Interference Suppression

by E. A. Rule ...... . : .... .... .. .... ' .... ... Part 1 Part 2

Radio Special ProductReport Drake TR- 7 h.f . Transceiver ....... .. ...... .. .. leom IC-25E 2m fm. Mobile ............. .. .. Shimizu S5- '1 055·h.f.Transceiver ... , . .... . . Trio/ Kenwood TS-530S h.f. Transceiver ... .

RAE-Nothing to it ! by H. A. Crookes . .. . ..... . Rechargeable Batteries in Radios

by B. P. Castle .... ......... .... .. .. ...... .. .... . Reminiscences by S. Keely : ............... Part 1

Part 2 . ., Kindly Note

Setting up a Workshop bV~(Jff Maynard .. .. .. . So You Want to be a'Listener? .

by Stephen J . Reading . . .. .. .. . ... . ...... .... . Space Shuttle Communications

by Brian Dance ................. .... ..... Part 1 Part 2

Special Product Report

51 26 Mar 30 Apr 54 May

45 Nov 26 Dec

32 ' Mar 40 Jan 53 OCt 36 July 39 Jan

38 Nov 22 May 32 Sept 22 No" 4g .; A~r

21 NOIf

40 Oct 40 Nov

Electrolube CM 1 OOp.c.b. Kit .... . . .... .. .. . . . 54 Nov 5abtronics 8610B Frequency Counter Kit.. 25 Apt-

5tudyingfor the RAre bV Arthur Harada ....... . 28 A.49 The April 16 ScheduleRe~ision . ...... . .. . . .. . : 32 July The CB CodeofPractice' ... ': ..... .... ...... .. .. P? Feb

. The February 12 Schedule,'Revision . . ........ . . 30 May Tropospheric Propagation by J . Glanville .. .. ... !:i2 ',. July Uncle Ed's Page ... ; .. ; .. .'. 28 Jan, 50 Apr, 29 MaY,·30 June,

33 Aug, 19 Sept, 39 Oct, 33 Nov, 25 bec Understanding Transmitter' Parameters .

by Peter Chadwick ...... ...... .. ..... .. . Part 1 25 May Part 2 50 June Part 3 26 July

Valves Used iri the EarlyDays by G. Jessop ... 22 ' Jan >; Kindly Note 57 .. Apr

Where are You?WI)~reaf11l? by M . W.Dixoh . 20 tp an . Kindly Note 23 Sept

Working OX by JeffMaynard ........ .... ... ..... 490ct YL Column by Elaine'Howard .............. ...... 64Feb 2m Fox-hunter by 0.0. White .... ...... ......... 42 Dec ' 28M Hz Operating byJeff Harris .. . ... ,.......... 38 Aug 28MHz-The Low-power OX Band

byD, O. White ...... ...... ...................... 36 Aug

KINDLY NOTE ' CB Operating Impressions '--- 1, Sept 1982 .. . Mobile Radio Alarm, Apr 1982 ......... : ....... . Modifying the JVC 3640 UKC TV, Apr 1982 .. 23 Morse Show, July 1982 ... : ....... . ... .... ..... .. 22 Overvoltage Trip-November, Circuit Ideas .

Supplement (page six) .. ..... . . . .. . .. . . . . . ... . . 33 , Remin iscences .~ 2 ~ 'SeptJ 982 ... . . ........ •. . RF Noise Bridge,Ja~19~2 . ....... .... . : ..... . SPecial Offer--.. pFGfl; .. Kiti . ~:Y:h 1982 .. . " " Valves Used irithe E~rl~days, F.eb 1982 . Where are You? Wh~l'ea~'J?, Jan 1982 ... .

NEW BOOKS Bi-Pak Semiconductors-Economy Stereo Amateur Television Handbook by Trevor

f.m. Tuner ....... ...... . ........ . ... .... ... . ... ... 39 Mar

Brown GBCJS and John Wood G3YQC . . . . . 50 July Black Star-Low-cost d.m.m . . ... . ..... ... .. .. .. 33 June

An Introduction to Radio DXing Bredhurst Electronics-Economy 10m Dipole 49 Jan

by R. A. Pen fold .. .. ... . ........... . ..... .. . .. . .. 50 Jan C-Brit Ltd.-CB Mobile Antenna ........ . . ... .. . 49 Jan

Basic Electricity .. . ... .... . .... .... . .. . Parts 1 & 3 42 May Carlton Nichol & Co. Ltd.-PCB Holders . .... . . 21 Feb

Early Wireless by Anthony Constable . .. . .. .. ... 50 July Centemp-Inexpensive d.m.m ..... . ... ... . ... . . . 20 Feb

Electronic Components & Systems Ch able Electronics-Data Display Monitor .. .. 48 Aug

by W. H. Dennis . ... . .... ... ..... .. .... ... . ... . . 37 Sept Chris Moulding Radio Services-

Electronic Projects - 4, Test Gear Projects ... 42 May British H F Transceiver ... .... ..... . . .. . .. . . . .. . 49 Dec

Electronic Projects using Solar Cells Chris Moulding Radio Services-

by Owen Bishop . . . ... .. . .. ...... . ... . ... . ...... 50 Jan 144MHz Masthead Pre-amplifier . .. . . . . . . .. . 18 Nov

Electronics Simplified-Crystal Set CQ Centre-HB9CV 70cm Antenna ............ 38 Sept

Construction by F. A. Wilson .... . .. ..... .. .... 37 Sept Datong Electronics-Broadband Pre-amplifier 48 Oct

Electronic Test Equipment Construction Dorman Smith Instrumentation-Electronic

by F. G. Rayer .. .. .... .. .... ............... .... .. 50 Jan Tester/Calculator ..... . . ..... ...... . . ..... . .. .. . 48 Oct

Electronic Test Equipment, Operation Electronic Brokers Ltd.- Portable 20MHz

and Applications .. .. .. . . .. . .. .. ...... . ... . . .... . 39 Nov Oscilloscope . ... . . ......... ..... .. . ... .... .... .. 49 Jan

Electronics Build and Learn by R. A. Penfold ... 42 May Evets Communications Ltd.-Speech

Electronics for the Beginner . . .......... . ......... 42 May Processor ....... .... ... .. .. ................ . ... .. 74 Apr

Electronics for the Service Engineer-Part 2 Fisher Karpark Industries Ltd.-Power

by lan R. Sinelair . . ... . . .. ....... ... .. . .......... 50 July Supplies ..... . .... ... ......... . . . . .. . . . . .. . .. . ... 21 Feb

Elements of Electronics Fremark Electronics-CB Antenna Tuner .. ... . 38 Sept

by F. A. Wilson ... ... .. .. ......... Books 4 & 5 50 Jan Fremark Electronics-Crowbar Overvoltage

Guide to World-wide Television Test Cards Protection Module .. ..... ............. .... .. ... 38 Mar

by Keith Hamer and Gary Smith ............. . 50 July Fremark Electronics-Power Supply Unit .. .... 31 July

How to Identify Unmarked IC's GVB Electronics-Morse Keyer with Memory 74 Apr

by K. H. Reeorr .. ... ................. . ....... .... 37 Sept Hitachi-Easy-fit Car Antenna ....... . . . ......... 39 Sept

IC Projects for Beginners by F. G. Rayer . .. . .. . . 37 Sept Hitachi-VKC600 Colour Video Camera ....... 33 June

Long Distance Television Reception (TV-DX) ICS Electronics-AMTOR Terminal Unit . . ... .. 48 Dec

for the Enthusiast by Roger W. Bunney . . ..... 42 May ICS Electronics-Morse/RTTY Reader ...... . . . 39 Sept

Mini-matrix Board Projects by R. A. Penfold .. . 37 Sept LAR Modules-Antenna Noise Bridge . . . .. .... 31 July

Oscilloscopes-How to use them How they Lascar Electronics-Digital Capacitance Meter 39 Sept

work by lan Hiekman . ... .. .. . .. . .. ..... .. .... . 42 May Lowe Electronics-R-600, TR-2500 and

Power Supply Projects by R. A. Pen fold .. .. .. . . 50 Jan TS-780 Trio Transceivers ... .... .. ... ... ..... . 20 Feb

Radio Handbook, 22nd Edition Lowe Electronics-TR-91 30 Allmode 2m

by William I. Orr W6SAI ... . ... .. ... . ... .. . ... . 39 Nov Transceiver ... . ... .. .. . .. . ... ....... . . ... . . ... ... 45 May

Radio and Television Servicing, 1980-1981 Microwave Modules-Advanced Morse

models by R. N. Wainwright .......... . .. ... . . 42 May Trainer . . . . . ..... .... . ....... ... . ..... ... . .... ... . 48 Jan

Semiconductor Data Book, 11 th Edition Microwave Modules-70cm Linear Amplifier

byA.M. Ba/l .. .......... .......... ....... ....... 42 May and ATV Transmitting System ...... . ... . . . . .. 31 July

Servi.cing Radio Hi-Fi and TV Equipment Microwave Modules-ASCII to Morse

by G. J. King ... .. . .... .. . .. . ... . ... .. ...... . .... 39 Nov Converter ......... .. . .... ............ .. .... .. ... . 48 Jan

The Gunnplexer Cookbook MuTek Ltd.-2m Pre~amplifier ........... .. . . . .. 48 Jan

by Rob Riehardson W4UCH · .. .... .. ....... .. . 42 May OK Machine and Tool-Soldering Irons ........ 19 Nov

The Theory & Servicing of AM, FM & OK Machine and Tool-Useful Cases . .. .. ..... 47 May

FM Stereo Receivers RFI Sh \elding Ltd.-Conductive Acrylic Paint. 45 May

by Clarence R. Green & Robert M. Bourque 50 July Silicon Speech Systems-Speaking Clock ... . . 49 Jan

The UK CB Handbook by Alan C. Ainslie ... ' .... 37 Sept SMC Ltd.-Antenna Rotators . ... . ...... . ... .... 48 Jan

The World 's Radio Broadcasting Stations and SMC Ltd.-New Antenna Products .. . .. .. ...... 45 May

European FM!TV by c. J. Both .. .. ..... .. .. ... 42 May SMC Ltd.-Oscar One CB Transceiver ..... .... 39 Mar Transistors Questions and Answers,

Solent Electronics (Gosport) Ltd,-

4th Edition by lan R. Sinelair .... .............. 42 May 144MHz Linear Amplifiers ...... ...... ........ 38 Sept

Two-metre Antenna Handbook South West Aerial Systems-UOSAT

by F. C. Judd G2BCX ................. .. ..... ... 42 May Antennas ..... ... . ... ....... . .. ... . ......... ..... 38 Mar

Video Questions & Answers by Steve Money. 37 Sept South West Aerial Systems-4GHz Satellite TV Receiving Package . ... .. . ... ..... . 49 Dec

Tandy~Base Station Microphone . ... ........ .. 48 Aug TE Controls Ltd.-Lamp Magnifier . . .. .......... 38 Sept Tek Marketing-Digital Mains Timer ........ ... 19 Nov

PRODUCTION LINES by Alan Martin Telecomms-ln-Iine TVI Suppressors .......... 48 Dec . Thanet Electronics-IC-4E and IC-M 12 AKD-In-line Filters & Signal Boosters .... .. . . 47 May Transceivers .. . ....... . . . ... . ........ .. .. . . . ..... 21 Feb Allweld Engineering-Window Aperture Thanet Electronics-Economy Pre-amp

Antenna Mount ....... ..... .. . .................. 20 Feb Microphone ............. . ... ........ . ........ ... 48 Jan Allweld Engineering-Antenna Swing Post Timestep Electronics-Digital Frequency

Assembly . .. . . ...... . ... ........ .... .. .. .... . . ... 18 Nov Counter ... . . ........ . . . ... ... .... . .... .. .... ..... 38 Mar Ambit International-Tuning Capacitor ........ 48 Aug Traveller International Ltd.-Versatile Mains Armon Electronics--tow-cost d.m.m.s .. . .... .. 48 Oct Plug ... .. .......... .. ... ...... . ................... 39 Sept Barrie Electronics-Toroidal Transformers ... .. 39 Mar Waters and Stanton-PCS-300 2m Hand-held 33 June BICC-Vero Packaging-New Wiring System .. 48 Aug West Hyde Developments-Mains Plug Case 18 Nov

Practical Wireless. December 1982 73

.. ,.1' .,

MISCELLANEOUS Benny ... . .. ...... 22·June, 35 July, 21 Aug, 37 Sept, 80 Oct,

17 Nov, 28 Dec News-News-News ...... 36 Jan, 40 Feb, 22 Mar, 40 Apr,

48 May, 25 June, 40 July, 41 Aug, 52 Sept, 62 Oct, 30 Nov, 39 Dec

Obituaries Bill Corsham G2UV .... .. ... ...... .. .. .... ... .. 40 Apr Peter Metalli ....................... .. ....... .. .. 30 Nov T. Graham Farish ..... ...... .. .. . ............... 50 Jan

Out of Thin Air .. ..... .. .. .... 38 Jan, 19 July, 43 Aug, 21 Oct, (page 8 of Supplement) Nov, 74 Dec

PW RUIS .. ..... 20 May, 18 June, 18 July, 18 Aug, 18 Sept, 20 Oct, 20 Nov, 22 Dec

Readers' Letters .... .. .... 48 Mar, 21 May, 74 June, 51 July, 23 Sept, 44 & 56 Oct, 17 Dec

Swap Shop ...... ... 36 June, 74 July, 59& 75 Aug, 72 Sept, 24 Oct, 51 Nov, 32 Dec

Things People Say ....... . .. . . 55 Mar, 44 May, 50 &60 July, 53 Aug, 52 Dec

SHOW REPORTS Tokyo Amateur Radio Exhibition .... . ... ..... .. . 34 Sept

SUPPLEMENT ete Index Volume 58 Jan- Dec 1982 .... .. .. .. .. .... ...... . 71 Dec

Special Features European ORA (OTH) Locator and Amateur

Callsign Prefix Maps.............. ...... .. .... . Mar

Aerials and aeri.al accessories are very definitely among the most popular topics covered in Practical Wireless. In response to requests from readers. we've reprinted a selection of articles from the past three years. plus two new features- one by Ron Ham on v.h.f. propagation. the other describing the "Ultra-Slim Jim". a new version of that most popular 2-metre aerial design by Fred Judd.

Out of Thin Air has 80 pages, 295 x 216mm, and is available from Post Safes Department. IPC Magazines Ltd., Lavington House, 25 Lavington Street, London SEl OPF, price £1.50 including postage and packing to U K addresses, or £ 1.80 by surface mail overseas. Please ensure that your name and address are clearly legible.

74

World Amateur Radio Callsign Prefix Map .... . It all began with F. J . Camm-Golden Jubilee

Special .. . .... .... . . . ... . . . ... .. .. . . . ..... .. ... ... . Circuit Ideas ...... ........ .. ..... .. . .... . . . ... ..... .

Kindly Note Computing for the Radio Amateur . . . . . .. . . . .. . . Competition-Win a Sinclair ZX Spectrum

Computer .......... .. ... ...... ..... ... .. .. ...... .

Special Offers Timestep DFC4 Frequency Meter Kit . . .. .... .•. .

Kindly Note Timestep FM4 Tuner ................... ...... ... .. Set of four tweezers ... . " ......... . . ..... .. . .. . .. . Steinel Master-Check Probe .... .. ............. .. Sinclair ZX81 Home Computer .. ... . . .. . . ... ... .

33

45 41 57 37 54

PLEASE MENTION

PRACTICAL WIRELESS

WHEN REPLYING

TO ADVERTISERS

May

Qct Nov Dec Dec

Dec

Feb Mar Oct Apr Aug Dec

~---~------------, OUT OF THIN AIR

Please send your order and remittance to:

I PC Magazines Ltd., Post Sales Department, Lavington House, 25 Lavington Street, London SE1 OPF Please send me ....... . copies at £ 1.50 each to include postage and packing (£ 1.80 surface mail overseas

I enclose P.O '/Cheque No . . .... . ..... .value .... . . .. .

UK remittances must be by crossed postal order or cheque (name and address on back please) and made payable to IPC MAGAZINES LTD

NAME .. . . . . . . .. .. . .. . . .. .... .. . . .. . ... ... .... ... . ... . (BLOCK LETTERS)

ADDRESS .... . .. . .. . ... . ........... ................ . (BLOCK LETTERS)

. . .... . ...... .. ... .. .. ..... Post Code .... . .......... . . .

Remittances with overseas orders must be sufficient to cover despatch by sea or air mail as required. Payable by International Money Order only

Company registered in England. Regd. No. 53626

A subsidiary of Reed International Limited

L - - - - - Cut round dotted line. - ____ _


(;;;;;;~~:~::~~;;~~~~::;~~~;t'''' on thellir

For the enthusiast who just uses equip-ment, the sections on Data Transmission,

:: Closed Circuit TV and Video Recording :: should be of great interest and the Bands :: IV and V DXer may well find the pages :: devoted to antennas and propagation and

11. ~~:;\~t;!~~~i~~I~~J:Yi.~t~;:~ cover) and is an important key to the I ::~~,,;1~:;:\~~~~"g of rno" ,p,,'fio

Fig. 13: EA8AHK Peter Lincoln Fig. 14: SSTV from Norway Peter Lincoln

" i;?€~J;;~~~~Ef.~f.,3~fg "Tagesthemen means 'topics of the day'" and the second from Richard

:: Hunt, Tadcaster, who explains. "The

liI~!~~~I~i~~1~~51~~

and lasts about half an hour with more in-depth coverage than the other two which last some 15 minutes". Richard also' told me that British TV programming times are more rigid than German, so the times he quotes may vary, by design, up to three-quarters of an hour per day. My thanks to John and Richard for their trouble, such information is valuable to many readers.

India, "Whenever it was bright, sunny and hot, I received TVDX signals, but when it rained there were no signals. However, the same was not true this year". An interesting observation Rana, no doubt you will do another comparison next year and let us know the result.

Can anyone help television specialist Ron Weller with a manual or any infor-mation for a 1950s Telequipment Ser-viscope, if so, drop him a line at 203, Tarring Road, Worthing, Sussex.

"I noticed a strange phenomenon in 1982·", writes Major Rana Roy, Bikaner,

Have Alba, model CB H2, 40-channel hand held f.m. CB transceiver. Would exchange for a Sinclair ZX81. Tel: 021-356 6454 (Birmingham) . T431

Have Yaesu FRG-7700M receiver, memories version, c.w., matching tuner, v.h.f. converter model E and active antenna unit, all as new. Would exchange for modern radio/music centre or video recorder to equivalent value. Details in writing please. B. Ken-neford,2 Mill Lane, Shoreham-by-Sea, W. Sussex BN4 5AB. T436

Have ZX Spectrum computer 48K. Would exchange for 144M Hz 10W in 100W out amplifier with r.f. switched pre-amp-must be workin!!j. Tel: Bristol 550596, ask for G6M H B or leave message and telephone number. T437

Have electric bass guitar, with case, leads etc. Also Tandy four channel 144M Hz scanner. Would exchange for M MT 432/28 transverter, 144MHz linear + p.s.u. (10W input) or MMK1296/144 receive converter/pre-amp, w .h.y. A.G. Robson GM8YIK, 38 Glebe Park, Duns, Berwickshire. T453

Have Nato R-444 v.h.f. search receiver with tuning units 36MHz-12GHz, spectrum analyser, Marconi RCI bridge, 35mm film viewdata, RnY converter using an oscilloscope, signal generators covering 1 OHz-4GHz. Would exchange all for receiver 500kHz-30MHz. Bob Wright, 249 Sandy Lane, Hindley, Wigan, Lancs. Tel: 55948. T455

Have Datong 070 Morse tutor. Would exchange for 144MHz linear 10W input or Fairing for Yamaha 250cc motorcycle. G8XCL (NOT OTHR) Tel: Lydd (Kent) 20954. T462

Have FRV-7700B converter to work with FRG-7700 or any general coverage receiver. Covers 118-135MHz, airband, 50MHz


band and 140-150M Hz. Would exchange for 432 or 1296M Hz TV transmitter or w.h.y. Tel: 0942 601216 evenings (Leigh) . T471

Have Skyleader 35M Hz f.m. radio control outfit plus 3 model engine kits, also Super 8 sound projector, two cameras, one Super 8 and one Standard 8. Would exchange for Kenwood TR2500 or similar 144MHz handheld with NiCads and charger. Tel: 074 570 469 (Clwyd) evenings only. T480

PW"SWAP SPOT" Got a camera, want a receiver? Got a v.h.f. rig, want some h.f. gear to go with your new G4? In fact, have you got anything to trade radio-wise?

If so, why not advertise it FREE in our ne~ feature SWAP SPOT. Send details, including what equipment you 're looking for, to "SWAP SPOT", Practical Wireless, Westover House, West Quay Road, Poole, Dorset BH 15 1JG, for inclusion in the first available issue of the magazine. A FEW SIMPLE RULES: Your ad. should follow the format of those appearing above; it must be typed or written in block letters; it must be not more than 40 words long including name and address/telephone number. Swaps only-no items for sale-and one of the items MUST be radio related. Adverts for ILLEGAL CB equipment will not be accepted.

81

* TRIO * Trio have just introduced some wonderful new models.

There's the TW 4000A, the two-in-one mobile. It combines 70cms and 2m in one box. There are far too many features to describe here so why not come in and try it for yourself?

For those who would prefer to have two separate radios, how about the new super slim mobiles - the TM 201 A and the TM 401 A. Both are attractively styled with a host of features that would make a trip to see them well worth the effort.

We have these models in stock and would be more than pleased to demonstrate them to you.

Trio have also just introduced a superb new range of accessories. We can now supply Trio SWR bridges, power meters, mobile microphones, headphones, microphone adaptors etc. etc. The entire range has the Trio stamp of quality.

C(9!'vsuQt ~ ;j?~~~S You 'll find all you need at Photo Acoustics. We can offer help and advice, the chance to try out the gear and financIal facilities too. We offer Creditcharge Instant Finance and accept Access and Barclaycard. Part exchange welcome.

Four minutes from the M1 Exit June. 14. Head for the High SI. Newport Pagnell. We're at No. 58. Parking at rear, opposite, or round the corner in Silver SI.

Ex-Gov. 27ft telescopic aerial close to 5ft. Good condi-tion, complete with all base & fittings £45. P&P paid. Callers welcome £25.

Pye Pocketfone Nightcall for PF1/TX/ RX. New boxed £17.00.

Whip aerial Ex-Gov. 4ft collapsible £1 .00.

Aluminium masts 4ft x 2in dia poles. Height 50ft, push in, complete in bags. Ex-Gov. stakes, ropes, base. Good condition £45.00. Callers £35.00.

Crystals HC6U Ex. Equip. 5.000 mc/s, 7.000 mc/s, 8.000 mc/s, 9.000 mc/so Also Glass Crystal 100 Kc/s, to fit B7G base. All at £2 p&p paid.

Telephones - Type 706 good condition £5 p&p paid.

Small 230V fans, 4 in. x 2! in. 2,500 r.p.m. £4.50 p&p paid.

Pye Pocketfone PF1, battery charger, 12 way with meter £10 p&p paid.

We have also for sale the following items which are too numerous to advertise. Callers only, valves, transform-ers, tuning units, receivers, bases, wave-guide, scopes, plugs, sockets, power units, capacitors, aerials, head-sets, cable, signal generators, BC221.

Opening times: Monday-Friday B.30am-S.OOpm, Saturday B.30am-12am

Please allow 14 days for delivery.

A. H. THACKER & SONS L TO

82

HIGH STREET, CHESLYN HAY NEAR WALSALL, STAFFS.

COME AND SEE US: Derek G3TGE, Kerry G61ZF, Ray G3TLE or phone 0908610625

* SPECIAL OFFERS * TR 9130 and 9 Ele Tonna £433 Buy either a TS 930S or a TS 830S from us and we will give you FREE an ergonomically designed and custom built equipment desk worth £69.95

* ANTENNAS * JUST ARRIVED! Two superb new antennas from Jaybeam. TB 1 for 10, 15 and 20 metres. This new rotary dipole has just three settings, Broadband, CW Only and Phone Only, with an extremely low SWR ONLY £69

TB2 A two element tribander for 10, 15 and 20 metres £126.50

AVAILABLE SOON - Conversion kits to ,convert a dipole to a 2-ele, a dipole to a 3-ele and a 2-ele to a 3-ele.

We also always have available the full range of TONNA and HALBAR antennas. We also stock Yaesu and leom equipment, including the new le 21 7E. and weare always pleased to demonstrate them to you. Many accessories always available. including the unrivalled range o f WEL2 meters. Pop in and see us

Photo Acoustics Ltd. • OF NEWPORT PAGNELL •

W)(' " ... , ~ (Fii.:i) ~ ••• ov,o ~ f§ .. -, ~ '\!J .. ". • " .

e COMMENT Hil .......... . . . .. . . . . .. ..... . ... . .... ..... . .. .. . .. . . 17 Jan Tightening Up .. .. .. .. ..... .... . .. . .. . .. . . .... ... . . 17 Feb Novices ..... . ... . . .... . . . . ....... . ... . ... . .. . . .. •.. 17 Mar Opportunity .. . . ... ........... . . .. ... . . . .. . ..... .. . 17 Apr PW and Crossbanding .... .. ........... .. ...... .. 17 May A Busy Month ... .. .. . . .... .... . . ... . . .. ... ... .. .. . 17 June Jamming .. .... .. .. ... . .. . ..... .. . ... . .. ... . . . . . . . . 17 Aug For HO Read DTI ................ .. ............. .. 17 Sept Merriman .. . ... . .... .... . ... .. .... . ... . . . ..... . . .. . 17 Oct The Squeeze Is On .. .. .... ... ............ .... .. .. 17 Nov New Modes .......... . .. ... . ... ... .. . . .... . ...... . 17 Dec

CONSTRUCTIONAL-General Flat-dwellers Beam by D. O. White ...... . .. .. . 27 Mar Modifying the 3 ·5/ 7MHz G Whip

by lan H. Crowther .... .. .... ........ .. ...... .. 31 Feb ' Morse Keyer by A. P. Cooper .. .. ............ .. . 63 Dec Ring Beam Antenna by F. C. Judd ..... .. .... .. . 26 Sept Table-Top Workbench by A. Sproxton . ... .... . 54 Aug 2m Beam Antenna by C. Loftus .. ............ .. 30 Feb

CONSTRUCTIONAL-Receiving Active ATU by lan Hickman .. ....... .. .... .... ..

Kindly Note Are the Voltages Correct?

by Roger Lancaster .. ..... .. .... ...... . Part 8

LMS Regenerative Receiver

Part 9 Part 10 Part 11 Part 12 Part 13 Part 14

by R. F. Haigh .. . .. ........... .. .... . ... Part 1 Part 2

MW Loop Differentia l Amplifier by S. Whitt . . Short-wave Low-pa!is Filter by R. A. Penfold . Versatile ATU by Tony Smith .. ....... .. ...... ..

36 Jan 66 May

39 Jan 32 Feb 28 Mar 27 Apr 33 May 32 June 40 Aug

24 Feb 32 Mar 42 Feb 54 Sept 20 Apr

CONSTRUCTIONAL-Test Equipment Digital Calibrator by E. A. Rule . ............... .. Directional Response Indicator

by Murray Edington . . . . . ... . ..... . ........ . .. . " Durlev" Distortion & SINAD Meter

by E. A. Rule ....... ......... .. .. ... .. . .. Part 1 , Part 2


Part 3 Part 4

43 Oct

19 Nov

44 Mar 42 Apr 38 May 68 June

Volume 59 January to December 1983

lst General Purpose Buffer Amplifier

by M. J. Darby .. .. .. . . . .... . ... ............... . 49 Oct IF Signal Generator byS. Niewiadomski ... ... 33 ' Nov "Ma'rchwood" 30A 12V Power Supply

by Nick AI/en-Rowlandson ........... Part 1 48 June Part 2 25 July

Kindly Note 61 Aug. 29 Sept. 60 Nov QRP RF Wattmeter by Tony Smith ... , ... . .. .. . 53 Oct QRP SWR Bridge by Tony Smith . .. .... ... .... . 50 Oct Sensitive Capacitance Meter by E. W. Nield . . 40 Oct Simple Wave meter for 144M Hz

by James A. Brett ................ . ...... .... .. 48 Oct 1· 5GHz Pre-scaler by D. S. Powis . . ... . Part 1 48 July

Part 2 28 Aug

CONSTRUCTIONAL-' Transmitting "Dart" Top Band QRP Transmitter

by Rev. G. C. Dobbs & Colin Turner . Part 1 45 Nov Part 2 40 Dec

RF Dummy Loads by F. C. Judd .. ...... Part 1 19 Jan Part 2 46 Feb

RnY with the ZX81 by Dick Ganderton ...... .. .... ... .. ... Part 1 61 June

Kindly Note 61 Aug Part 2 56 July

"Severn" 7MHz QRP Transceiver by Rev. G. C. Dobbs ............ .... ... Part 1 48 May

Part 2 27 June Part 3 34 July Part 4 64 Aug

ON THE AIR Amateur Bands byA. E. Dowdeswel/ 58 Jan. 58 Feb.

58 Mar, 57 Apr, 68 May, 73 June, 67 July, 70 Aug, 70 Sept, 67 Oct, 65 Nov, 67 Dec

MW Broadcast Bands by C. Mol/ay 63 Jan, 64 Feb, 64 Mar, 63 Apr, 74 May, 79 June, 75 July, 75 Aug. 76 Sept,

72 Oct, 68 Nov, 72 Dec SW Broadcast Bands by C. Mol/ay 65 Jan. 65 Feb, 65 Mar,

64.Apr,77 May, 80 June, 76 July, 76 Aug, 77 Sept, 74 Oct, 72 Nov, 73 Dec

VHF Bands by Ran Ham 66 Jan, 69 Feb, 69 Mar. 68 Apr, 79 May, 82 June, 79 July, 79 Aug, 81 Sept,77 Oct,

75 Nov, 74 Dec TV by Ran Ham 70 Jan, 73 Feb. 71 Mar. 70 Apr, 83 May, 86 June, 83 July, 83 Aug, 84 Sept, 80 Oct, 79 Nov, 79 Dec

83

GENERAL INTEREST Planet 2000 .. . .. . .... . .... . . .. .. .... . . ... ... .. . 51 Feb Shogun 82 ....... .. .. .. .... .. ...... ... ......... . 51 Feb

Aiming High-Safelyby Rob Mannion .. ... . . . 22 June Telecomm TC-9000 : ... . .... . ..... . .. .. .. . .. . 51 Feb Air Test (user reports on sets and sundries) Dots and Dashes by Ron Ham .... .. ..... ...... . 34 Sept

AEA CW/RTTY Reader MNA-RO .. .... .. ... 50 Jan Faroe Islands DX-pedition AEA WB-1 C "Moscow Muffler" by Bruce Nicholson .. . . . . . .... . . ... .. . . .. ... .. 63 Nov

Woodpecker Blanker ..... . .. . ...... . . . .... . 54 Nov Getting into SSTV by Nick Foot .. ...... .. .. .. .. 56 June Altron SM30 Telescopic Mast .... ......... .. 20 Mar Introducing OSCAR Ant Silver 70 432MHz Antenna ..... .. .. .... 68 Aug by Mervyn J. Axson ........ .. .. .. ..... Part 1 44 Feb Cambridge Digital Superkit ... ... . ... ... . .. . . 53 Jan Part 2 40 Mar Daiwa Active Filter AF-606K . .. . . . ..... . . . . . 48 Jan Part 3 34 Apr Daiwa Electronic Keyer DK-21 0 ...... . . . .. . 48 Jan Learning Morse by D. M . Gray .. ....... .. ....... 20 Aug

. Datong Broadband Preamplifier RFA ... . .. . 49 Jan Maths for the RAE by R. Lancaster . .... Part 1 19 Dec Gemscan 70 v.h.f./u.h.f. Scanning Modern Receiver Front-End Design

Receiver ... ............. . ... ... . ... . . . . . .. .. . 55 Nov by G. W. Goodrich .... ........ .. ...... . Part 1 40 Apr GSC 3002 Auto Capacitance Meter ... . . '" 63 July Part 2 45 May G4MH Minibeam ........ . ............... . . . . .. 25 Mar Modifying the Marconi Atalanta HS-HF5 5-band Vertical Antenna ...... .. .. 32 Apr by W. Titmuss .. . . . .. ... . . . . .. .. . .. . . . . .. ... .. .. 37 Mar Icom IC-505 50MHz Transceiver .... .. ..... 28 Oct Mods by Roger Hall (suggestions on Lectron Book Laboratory ................ .. ... 69 Aug modifying amateur equipment) . . . . . No. 19 28 Jan MET 144-19TNBS LongYagi .. .. .... .... .. 27 Dec No. 20 76 Feb MizuhoMX2 144MHz s.s.b./c.w. No.21 19 Apr

Transceiver ............ . ............. .. . .. . . . 50 May No. 22 66 May Soar Digital Frequency Counter FC-845 . . . 49 Jan No. 23 60 July Spectrum Communications 2m Linear . . ... 53 Jan No. 24 19 Aug Standard C7900/8900 u.h.f./v.h.f. No.25 25 Sept

Transceivers .. .. .. . . .. . '." .... .. . . . . . , .... . " 27 Oct No. 26 59 Nov Western Electronics' UM 1-Ultimast . . . ... .. 23 Mar Now it Can be Told by John D. Heys .. .... ... .. 59 May Wood & Douglas 70PA2/S r.f. Pre-amp . . . . 37 Sept Packet Radio by Margaret Morrison Wood & Douglas 430MHz Synthesiser and Dan Morrison ........ .. .. .. ...... . Part 1 57 Dec

Kit ... . . .. .. ................ .. .. . .. ... .. .. .... . 36 Sept Practical M icrowave Operating by M . W.Dixon 54 May Yaesu FT -230R 144MHz f.m. Transceiver 33 Apr QTI-The Talking Magazine .. .. .. ........ .. .. .. 28 July

Amateur Radio Before 1914 Radio Communications and Sunspots by G. R. Jessop ............. . . ... .... . . Part 1 48 Sept byJ. A. Kennewell . ... . .. ... . ..... . .. .. . . . .. .. . 49 Apr

Part 2 30 Oct Radio Interference Suppression Antennas by F. C. Judd ..... , ............ Part 1 54 Feb by E. A. Rule . ... .. . ... .. .. . . . . . . . . . . . . . . Part 3 25 Jan

Part 2 52 Mar Radio Range-Height Calculations Part 3 54 Apr by R. T. Irish . . .. . . ... . . .. . . . . .. ... . . . . . .. . .. . . . . 58 Aug i Part 4 42 May Radio Special Product Report Part 5 44 June Standard C5800E 144MHz Multi-mode Part 6 52 July Transceiver . . .. . . ... .. . .... . .. ..... . .. .. ... .. 50 Mar Part 7 30 Aug Trio TS-430S h.f. Transceiver .. ...... . . . .. . . 31 July Part 8 62 Sept Yaesu FT-ONE h.f. Transceiver .. .. .. . ... .... 51 May , Part 9 58 Oct Yaesu FT -77 h.f. Transceiver .... .. .. .... .. .. 44 Aug

Part 10 56 Nov RAEM Calling by Tony Smith .... .. .. .. .. ....... 30 Jan Part 11 36 Dec Reminiscences by S. Keeley . . .. . .. . . . .. Part 3 64 Dec

Antenna Wind Loading by G3UDO . . .. . ... . . . . 22 Feb Ring Beam Antenna for 144M Hz Are the Voltages Correct? by F. C. Judd . .. . ....... . ... . .. . . . .... . . . . .... . . 26 Sept·

by Roger Lancaster ... .. ... . . . . . . . . . . . , Part 8 39 Jan Rock-bottom Start to Amateur Radio Part 9 32 Feb by G. P. Stancey ........ .. ...... .. .. .. ...... .. . 32 Dec

Part 10 28 Mar Save a Vintage Radio for Posterity Part 11 27 Apr by G. Thompson . . .. .. . . . . ... .. . ..... .. . . . . .. .. 64 July Part 12 33 May Spark to Space by Ron Ham .... .. .. .. .. ..... .. . 55 June Part 13 32 June Structured Morse Learning Course Part 14 40 Aug by D. M . Gray ......... ... ...... .. .. .. .... .. .... 22 Aug

Avoiding Mixer/Oscillator Tracking Problems Kindly Note 60 Nov by Eric G. Duncan ......... ... ........ .... .. . .. 42 Jan Support Your Local Radio Club

Bandscanby Peter Laughton . .. . . . . . . . . .. .... .. 56 Mar by D. O. White .... .. .. . . ... ... . .... .. . .. ..... . . 61 Aug 56 Aug The Design and Use of Heatsinks

Basic QSOs in German by E. A. Rule ..... ...... .. .... .... ... .. .. Part 1 45 July by G. W. Roberts .. ......... .. .... ..... Part 1 38 Feb Part 2 52 Aug

Part 2 36 Apr The Largest Antenna in the World Basic QSOs in Spanish by Gareth W. Roberts by Brian Dance .. . . . . .... . .. . . .. ........ .. .. . . . 40 Sept

& IIdefonso Sevilla .: ......... . .. .. .... Part 1 67 Sept The Telecomms Bill Expla ined .. . . . . . . ..... . . .. . 42 June Part 2 63 Oct The Merriman Report by Geoff Arnold ... .. . . .. 31 Nov Part 3 40 Nov The World of QRP by Tony Smith . .. .. . . . . . .. . . 44 Jan

Beyond The Blue Horizon by F. C. Judd Part 1 48 Aug Transceiver Selection-A Systematic Part 2 44 Sept Approach by G. Y. Loades .. .... .. ........ .... 66 Dec

CB Rig Check Two Decades ofDXing by Roger Bunney . .. . . 88 Dec Lucas ACB888 .......... . ....... ..... . ....... . . 50 Feb Uncle Ed's Page ........... 22 Jan, 29 Feb, 30 May, 37 June, Oscar CBM271 .. ......................... .. .. . 50 Feb 22 July, 26 Aug, 22 Sept, 38 Nov, 22 Dec


IC of the MONTH byB. Dance The Story of Radio by W. M. Dalton Part 1. How Radio Began .. .... .. ...... .. .... 39 Dec Ferranti ZNA234 TV Pattern Generator .... . . . 54 Jan Part 2 . Everyone an Amateur ...... .... ...... 39 Dec

. Plessey SL6700 AM Lf./Demod .. . . . . . . Part 1 51 June Part 3. The World Starts to Listen .. .. .... .. . 39 Dec Part 2 40 July Tomorrow's Television Today

Plessey SL6440 DBM ..... , ... .... ... . .. . ... .... 56 Sept by Michael J. Stone . .. . .. . .... . .. , ........ . .. . 43 Sept

K/NDLYNOTE VHF/UHF Manual, 4th Edition

Edited by G. R. Jessop G6JP . ...... . . ........ 36 Aug Active ATU-Jan 1983 .. .... .. . .. .. ... ..... . ... 66 May Video User's Handbook, 2nd Edition Computing Supplement-Dec 1982 .. . .. .. : . . 46 Jan by Dr. Peter Utz .. . ... .. ... . .. . ...... ........ . .. 43 Sept PW "Marchwood"-July 1983 .... . .. . .. . .. .. . 61 Aug 30 Solderless Breadboard Projects, Book 1

29 Sept by R. A. Penfold . . ...... , ........ . . . . . ... . . . .... 36 Aug 60 Nov

RTTY with the ZX81-1-June 1983 .... ..... . 61 Aug Structured Morse Learning Course- PRODUCTS by A/an Martin Aug 1983 .. . .. .. . .. .. .. . . . . .... . . . .. . ......... . 60 Nov

Alcon Instruments-Signal Injector ....... . . .. 39 Sept

NEW BOOKS Amateur Electronics UK-FT-757GX Aerial Projects by R. A. Penfold . . ... . . . . . ... . . .. 36 Aug h.f. Transceiver ..... . ..... . ......... .... .... .. .. 39 Aug An Introduction to Video Amateur Radio Exchange-Dual-band f .m.

by D. K. Matthewson .. . . .. . . ....... .. . . ... ... 36 Aug Transceiver TW4000D .................. . ... . 20 July Beginner's Guide to Amateur Radio Ant Products-432MHz Beam Antenna ...... 37 Feb

by F. G. Rayer G30GR ......... .... ......... .. 43 Sept Automatic Safety Lighting-Safety Beginner's Guide to Television, 6th Edition Microphone System .... . ... . .. . . . . .. . .. . . .... . 37 Feb

by Gordon J. King, revised by E. Trundle .. . 36 Aug Beckman Instruments-Low cost d.m.m .... . . 40 June Beginner's Guide to Video BeeWare-934MHz CB Transceiver ... . ... . .. 47 Jan

by David K. Matthewson .... . . . . .. ... . . . . ... . 39 June BeeWare-934M Hz CB Transverter ..... .... . 41 June CB Projects by R. A. Penfold . ... . . . . . . . . . .. . ... . 39 June Black Star-1 GHz Frequency Meter .... . .. .. .. 34 Mar CB Projects, 2nd Edition by R. A. Penfold . . .. . 36 Aug Black Star-1 ··2GHz Frequency Meter ...... .. 28 Nov Complete Guide to Video Cassette Recorder- CO Centre-Antenna Extender ......... . . .. . . .. 38 Sept

Operating and Servicing byJohn D. Lenk .. 29 Aug Datong Electronics-Automatic Digital PLL Frequency Synthesisers-The\ry Woodpecker Blanker .. . ...... ...... . . . . ....... 28 Nov

and Design by Ulrich L. Rohde ...... .... .. .. . 61 Sept Datong Electronics-Auto Notch Filter . . .... . . 40 June Electronically Speaking-Computer Speech Datong Electronics-RF Direction Indicator . . 34 Mar

Generation by John P. Cater .. .. .. .. ...... .. . 61 Se pt Davtrend-VHF Antenna Switch ..... . .. . . . .... 51 Aug HF Antennas for All Locations Dewsbury Electronics-28MHz f.m.

by L. A. Moxon BSc CEng MIEE G6XN . .. . . 43 Sept Transceiver . . .. .. .. . ...... . . . ... .. . . .. . ... .. .. . . 24 Apr How to Get Your Electronic Project Working Draper Tools-Precision Pliers Range ......... 37 Qct

by R. A. Penfold . ... . " .. .. .... . . . .. . . . .. .. .. . .. 65 July Fidelity Radio-Cordless Telephone Unit .. ... 21 July How to Use Op-amps by E. A. Parr . . . .. . . .. .. . . 39 June Fidelity Radio-Radio/Clock/Telephone .. .... . 38 Sept Interlerence Handbook Gardner Precision Engineering-Self-Feed

by William R. Nelson WA6FQG . ........ .. .. 39 June Soldering Iron . . .. .. .. .. .. . ..................... 27 Nov International Diode Equivalents Guide Graham Bell Instrumentation-Temperature

by Adrian Michaels . . . ..... . . . . ... ... .... . .. ... 43 Sept Measurement Interlace Unit .. ............... 40 June Introduction to Electronic Speech Synthesis Greenpar Connections-Versatile Test Leads 34 Oct

by Neil Sclater .......... . .. . ..... . . .. . . . . . . .. .. 61 Sept Ground Control-16K RAM Pack .... , . ...... . . 47 Jan Microcomputers in Amateur Radio G2DYM Aerials-HF Bands Trap Dipole .... . . 36 May

by Joe Kasser G3ZCZ . .. . . . . . .. . ..... .. .. . . ... 36 Aug G4QGP Electronics-Antenna Spreader Modern Op-amp Projects by R. A. Pen fold . ... 43 Sept System .. .. . ....... . .. .... .. ... . ....... .. ... ..... . 39 Aug Multi-circuit Board Projects by R. A. Penfold . 29 Aug Holdings Photo Audio Centre-FT. 1 0 1 Popular Electronic Circuits-Book 2 Modification Kit ....... . . . . ..... . ... ...... .... . 24 Apr

by R. A. Penfold . .. . . .... ..... .. .. .. . ... . . . . ... . 39 June ICS Electronics-Morse Code Keyer/Trainer . 24 Apr Practical Design of Digital Circuits ICS Electronics-'··Moscow Muffler "

by lan Kampel . ..... .. . ... . .. ... . : .. . . . . . ... ... 43 Sept Woodpecker Blanker ....... .. .. ... . . . ..... . ... 39 Sept Practical Electronic Building Blocks-Book 2 Isherwood Electronics-AM/FM Stereo

by R. A. Penfold .. ... ... . . .. . . .... . ... . . . . ... . . 61 Sept Tuner . . ... ... ... . .... .. ..... .. ............. . .... . 36 May Practical Handbook of Valve Radio Repair Keene International-RF Screened Rooms .. . 34 Mar , by Chas. E. Miller .. .... . . ........... .. . . . . .. ... 65 July Light Soldering Developments-Electronic

Ouestions and Answers-CB Radio Soldering Iron .......... ...... .. .. ......... . .. . . 37 Qct by F. C. Judd .. ... . ........ . . .. . .. .. .. .. .. .... . . 65 July . Light Soldering Developments-Soldering

. .Radio arid TV Servicing 1981 /82 Kit . ... ............... .. ........ . . .. .. . .. .. . . ..... 36 May " by R. Wainwright . . .... . . . . . .. . . . . . . .. . ... .. . .. 61 Sept Lowe Electronics-Deluxe Tuning Knob . . .... 27 Nov Solid State High-Frequency Power Lowe Electronics-Pocket-sized 144M Hz

by Irving M. Gottlieb .. ... . .. .. .. .. .... . .. .... . 36 Aug f.m. Transceiver .. . .... .. . ...... ...... .. . .. .. . .. 27 Nov Television Engineers' Pocket Book, Lowe Electronics-TS530S h.f. Transceiver .. 39 Sept

7th Edition by Malcolm Burrell .. ... .. . ... . . . 43 Sept Marconi Instruments-Microwave Learning The Art of Programming the ZX Spectrum Lab . .. . . ... . ... .. . . ... ................. . ...... . . . 24 Apr , byM.James .. ... . .. ..... . . . .. . .. . ... . . . . ...... . 65 July Mullard-TDA 7000 f.m. Radio i.c ............. 51 Aug The Handbook of Antenna Design-Volume 2 MuTek-Pre-amplifier for the FT290R ........ 21 July

Published by Peter Peregrinus Ltd. on MuTek-Receiver Front-end for the IC-251 behalf of the lEE ...... .. .. .. ... . ...... ..... . ... 39 Dec and IC-211 . ................................... . 34 Jan

Practical Wireless, December 1983 85

OK Machine & Tool-PCB Holder .. ......... . . 34 Sanderson Centre-3-way v.h.f. Antenna

Switch . . . . ..... ... . .. ... ..... . .. ... .. .... ... .. . . 51 Scarab Systems-RTTY Cassette System &

Interface Board . . . .... ... . ........ . ............ 37 Semiconductor Supplies-Quality d.m.m.s ... 28 SMC-FT-980 h.f. Transceiver .............. . . . 47 South West Aerial Systems-Antenna

for 50MHz ... .. ........ . .. ... . ... .. .. ..... ..... . 39 South West Aerial Systems-Economy

DXer's TV ..... .. . . . ........ .. ..... .... . . .. . . . ... 39 S & W Battery Charging Systems-

Battey Charging Controller ...... ...... ....... 34 Telecomms- Linear Amplifier .............. . .. . 34 Thanet Electronics-IC-120 Microwave

Transceiver and IC-751 h.f. Bands Transceiver ....... . ... ....... .......... . ...... . . 38

Thanet Electronics-IC-271 E All-mode 144M Hz Base Station Transceiver ... . .. . ... 34

W . Armes & Son-Threaded Nylon Hose Clamp . . ... . .... ... ... . . .. . .. . .. .. . .. ... . .. ... . . . 34

W . H. Westlake G8MWW-Low cost Coaxial Cable . ... . .... . . . ... . . .. . ........... . . . 36

MISCELLANEOUS

Mar

Aug

Feb Nov Jan

Aug

Sept

Oct Jan

Sept

Oct

Oct

May

PW Programs .... 58 June, 53 Sept, 33 Oct, 64 Nov, 86 Dec PW RUIS ..... ..... 18 Jan, 18 Feb, 18 Apr, 18 May, 18 June,

18 July, 18 Aug, 18 Sept, 18 Oct, 18 Nov, 18 Dec Readers' Letters .. . 19 May, 38 June, 63 July, 33 & 69 Aug,

58 Sept, 38 & 56 Oct Subscriptions .. ......... 41 June, 25 Aug, 57 Oct & bound-in Swap Spot ..... ........ .... 72 Jan, 75 Feb, 26, 39 & 43 Mar,

53 & 74 Apr, 62 & 85 May, 66 & BBJune, 55 & 66 July, 57 & 62 Aug, 32 & 86 Sept,

24 & 62 Oct, 42 & 84 Nov, 81 Dec Things People Say .... .. . ...... ... .. 66 May, 43 June, 42 July,

42 & 53 Aug, 89 Dec

CONVENTION REPORTS BATC Convention Report

by J. Richardson & M. Staton ... ........... .. 52 Sept EDXC Conference Report by Geoff Arno/d .... 30 Sept

SUPPLEMEN.TS etc Special Features Data card "2m Repeaters" .. .... .. ........... ... Mar PW " Computing in Radio" Special ..... . . . . ... . 43 Dec QRP 144MHz Contest .. ......... .. ............ .. 19· Apr

Benny ... ... ... ... . 34 Jan, 19 Mar, 33 Apr, 58 May, 34 June, QRP Contest Results by Neill Tay/or . ... .. ..... 49 Nov 66 July, 57 Aug, 61 Sept, 37 Oct, 39 Nov,!;l5 Dec VH F Contest Special

Did You Know? . . . . . . ... . ... 29 Sept, 62 Oct, 37 Nov, 60 Dec VHF Contest Operating by fan White .. . . . . . 22 News . ... 32 Jan, 19 Feb, 18 Mar, 30 Apr, 20 May, 19 June, The VHF Contest Station by N. P. Tay/or . .. 25

17 & 19 July, 34 Aug, 19 Sept, 19 Oct, 25 Nov, 24 Dec Power Measurement for QRP Out ofThin Air ........ ...... 65 June, 67 Aug, 66 Oct, 35 Dec by C. L. Oesborough . . .. . .... . .. . . . .. ..... . . 27 Parabolic Dishes ... .... . . .. ........... 58 June, 24 Aug, 38 Dec ZX Spectrum Competition-Results . . . .. . .... . 50 Passport to Amateur Radio . . . . .... 52 Feb, 53 June, 55 Aug, Index

51 Sept, 66 Oct, 28 Dec Volume 59 Jan-Dec 1983 .... .. .. .......... . ... 83

. "The pro9,r~m~ .. described in the ,0', Computing:Special Feature in this " <

issue are available on cassette for both , theZX81 and"Spectrum co~puters. ' Th~ programs on e,ach tape are:

"METERS" Ammeter and Voltmeter design "RANGE" Radio range calculations

"nSl CARDS" Prints nS,L cards ·'ANTS+FEEDS" Antenna and feeder

~lcuI8tions", t,,,·< DATA" Tuned circuit 8ndcoi~ design ReACTANCE" Reactance and impedance

. calculations '. /'f~ • ·ff .. / ~

Order the ZX81 version as PW Radio Programs-4 and the Spectrul1l ·· versioo. a~PW Radio Programs-5. .

' 'The SRectrum version of PW,ZX81 RadioPrograms-1 cassette . is also available as PW Radio Prp.QrafT/s--3 . . All threEp' tapes are av~ilable from Practical Wk.eless

. Cassette Tape Offer, Rochester X, Kent .. M E99 1 AA, " pric~f:3.7c5eaciliJnc. (:lastage and YAT,, ~; " ' . . Pleasij ~tatEtelearly which tape(s) YOu requ ire. AI,Iow 28 days for delivery.

May May

May June

Dec


COMMENT Getting Wise .. : .. . . . . . .. ... .. . : . . . . . . ... . . ..... . . . "Black- Box" Syndrome ..... , .. ... .. . .. .... . .. .. Static.Mobile? , " . .. .. .. .... . ',' " . . ... ; .. . ' ....• • " I yvo?de~W~y . . .

'n' ,:, ; .•

,;J opBandpireption Finding , by Chris Plummer ........ '.... .. . Part 1

Part2

, 'Praciical Wireless; December 1984 . ;,.

54 Mar 34 Ap':

Volume 60 January to December 1984

,CONSTI1UCTIONAL-Test Equipment " Bridport': OualPower Supply

by E. A. Rule .. .... ........ .. ...... , .. , Part 1 Part 2

, ' RFPowerMeterby James A. Brett .. . Sirn,ple DC Transistor Tester ,. by Basil Spencer ... . . . . . .. . . .• . ....... .. , . . . . . . Simple RF'Transistor Tester

by Basil Spencer ...... , .. . . , . . ' . . . . . . . . . . . . . , . .

46 Feb 26 M ar 27 Aug

37 Oec

38 Oec

,CONSTRUCTIONAL-Transmitting Automatic Repeater Access Tone

byNick Foot ... .. ... . ... .. ...... , .... .. . : . , .. . . Bug Key with 528-bit Memory

by Graham Maore , ....... .. " .... , ........ , .. . 'Building an HF Linear Amplifier and ATU

by I. Buffham .. .. .. ... .. .. .. .. ....... , Part 1 Part 2

"Dart" Top Band ORP Transceiver Follow-up by Ken Buck .", . . ,"

HF Tune-up Aid by L. G. Parkin , .. .. ..... ...... . Microphone Pre-amplifier wi th AGe , byJon Gudgeon .. .. .. , .. .. .... .. , .. .. .... .. . .. RTTY with the ZX81 - Follow-up

by Dick Ganderton ..... . . , ,' . ,' .. . ....... . . . ,. Stable Toneburst by D. I. Shaw . .. .. . . , . . . .... . . "Teme" Modular ORP Transceiver

byRev. G. C. Dobbs .. .. .. , .... , .. ... Part 1 Part 2

TransCj3iver VOXUnit by R. A. Penfold ", .. . . , Kindly Note

'Gl:NERAL INTEREST 'An'tennas and Planning Law

byJ. J . Fields > ... . . . .. . . .. ... . .... , . . .

Basic OSOs in Italian by G. W. Roberts andPaolo Pel!egrineschi , . . . ' . . . , "

Part 1 Part 2

Part 1 Part 2 Part 3

Batteries by Tony Smith ... . . . ...... ... " .. . , . . , ' Cellular Radio-The Vodafone System

by ChasE Miller . . . . . . . ... . , .. . . ... ,", . ... . .. ·. Compqnent Ratings for Beginners

by Roger Lancaster . .. . , ... . . , . .. , ... . . . . . ", . .

24

40

54 30

30 6 1

5 1

52 48

40 24 60 32

40 4 6

27 55 2 1 40

40

53

June

Dct

Apr May

Oec May

Aug

May Nov

Nov Oec M ar Sept

Sept Dct

July Aug Sept , July

Oec

Oec

77

Controlling Satellite Footprints by Brian Dance . .. .. ..... . . .. . ... . . . .......... .

Domestic Aerials in the .. GoodOld Days by Old Timer . . . ... . . . ................... . . . .. . .

Fuses-Selection and Use by E. A. Rule........ .. .. .... .. .. ...... Part 1

Part 2 FM Demodulators for Low Deviation

Signals by N. D. N. Belham ............... .. . Hints for the First CW QSO by G. P. Stancey . Introducing Moonbounce by fan F. White . . . .. Introduction to Antennas

by GordonJ. King . .... .............. Part 1 Part 2 Part 3 Part 4

Is Your FM Bandwidth Really Necessary? by N. D. N. Belham ... ........ ...... .. .. . .. ..

Kite Antennas for Top Band by P. Painting ... . Licensed to Spend by Janet Dugmore . . .. . .. . . Maths for the RAE

by Roger Lancaster.. .. .... .. ....... Part 2 Part 3

Modifying the FRG-7 by Peter D. Rouse.

Mods by Roger Hall (suggestions on modifying amateur equip~ent) . . .

More Holes than a Gruyere Cheese?


No. 27 No. 28 No.29 No. 30

byJ. O. Brown . . ... ...... ' .. .. .. ...... . ..... .. Multiple Choice

Practice Questions for the RAE .. ... .. .... .. . Kindly Note

Names from the Past by Tony Smith 1:-Sir Charles Wheat stone ... '.' ... .. .. . .. . . .

Noise in HF Receivers by G. P. Stancey . . .. .. . Packet Radio by Margaret Morrison,

Dan Morrison and Lyle Johnson . . . Part 2 Parchments for Metre-wave People

byJack Hum . ... . .. ... ...... . . . . . ......... ... . Practical LC Filter Design

by Edward Wetherhold .. ... . ....... Part 1 Part 2 Part 3 Part 4 Part 5

Publicity-Getting the Message Across

56 July

54 Jan

20 Feb 52 Mar

32 Dec 42 Aug 68 Mar

20 Aug 26 Sept 24 Nov 19 Dec

32 June 43 Jan 28 Oct

68 Jan 49 Feb

38 29 36

Aug Oct Nov

46 Jan 19 May 2 1 July 54 Sept

30 July

23 Oct 59 Dec 54 Nov 28 Dec

51 Oct 35 Aug

25 Jan

54 Feb

47 July 46 Aug 44 Sept 52 Oct 44 Dec

by David W. Green........ .. .. .... ...... .. ... 53 June PW Review

Ant Products Tiger LY 101 144M Hz Antenna ............... .. .. .. .. . .......... .. . 45 June

AOR AR-2001 Communications Receiver .... . . . . .. . ... . : .. .... .. .. .. . .. . .. .. .

Belcom LS20-XE 144MHz Handheld Transceiver ....... . ..

Datong AN F Auto-Notc~ Filter .. . . .... .. .. . . Icom IC-R70 Communications

Receiver .... .. ... . .... ... ..... .. . ........ . . . . MuTek TLNA432u and SBLA 144e

Pre-amplifiers ..... ...... .. . .. ... . .. ... . . Reftec 934M Hz CB Transceiver .. . ... . . . Spectrum RC6-2 50MHz Converter .. . Uniden CR-2021 Communications ·

Receiver .. . .. . ... . ... . .......... .. . .... . . . . Yaesu FT -757GX h.f. Transceiver .. .. ..

78

28 May

67 Jan 41 Jan

51 Apr

52 July 65 Mar 32 Feb

22 June 58 Aug

Yaesu FT-980 h.f. Transceiver ............. . September 10 Schedule Revision ... ...... . .. . . Shetland Repeater by Arthur Tait .... .. ...... . .

55 May 18 Nov 30 Mar

Spare a Thought for your Rectifier . by R. T. Irish ... . .... . .......... ... ... .. ..... .. . . 37 Feb

The Early Work of Guglielmo Marconi by F. C. Judd . .. . .. ... ....... ......... Part 1

Part 2 35 May 27 June

The Origin of Radar by F. C. Judd . ...... . ................. Part 1 34 Feb

Part 2 34 Mar Uncle Ed's Page... ...... 42 Feb, 21 Mar, 62 Apr, 21 June,

22 Oct, 47 Nov Upgrading the Realistic DX- 1 60

by Charles Mollay ..... . .. . . ... . .. ..... . .. . ... . Value for Money? by G8YDK . .. ..... . ...... .. .. What is SINAD? by Brian Dance . . .... .. . . .. . . .

30 Apr 60 Apr 24 Mar

World-wide Satellite Communications by Brian Dance...................... Part 1

Part 2 Your Life in Your Hands! by E. A. Rule . .. ..... . 144MHz Repeaters in Ireland .. . .. .... .. ...... .

56 Sept 24 Oct 36 July 19 Jan

KINDLY NOTE Microwave Dish Construction-Feb 1984... . 71 Multiple Choice Questions-Oct 1984... ... .. 59 PW "Dart"-Nov 1983 ........ .. .... .. ......... 29 PW Datacard, 70cm Repeaters-May 1984. 37 PW Radio Programs .. ........ .. ............ .... . 71 PW Radio Programs, 5 Cassette-Mar 1984 52 Remote-tuned M F Loop Antenna-Oct 1984 59 Simple Top-Band Receiver-June 1984 ...... 32

28 Transceiver VOX Unit-Mar 1984. . ..... . . .. . . 32

le of the MONTH by B. Dance National Semiconductor LM 1 035 Audio

Control... ..... . . .... ... ........ .. .. ... .... ... ... 35

PLEASE MENTION

PRACTICAL WIRELESS

WHEN REPLYING

TO ADVERTISERS

Mar Dec Apr June Mar Aug Dec Sept Nov Sept

Sept


ON THE AIR AmateLlr Bands hyA:E. Dowdeswell .. .... i:72Jcm, 63 Feb,

72 Mar, 64 Apr, 64 May, 54 June, 57 July, 66 Aug, 60 Sept 54 .0ct,' 55 Nov, 61 Dec

MW Broadcast Bands by C. Mol/oy .... ,... 77 Jan, 69 Fe,b, '76 Mar, 69 Apr, 69 May, 60 June, 63 July; 70 Aug,

67 Se pt, 610c!, 61 .Nov, p5 Dec SW Broadcast Bands by C. Mol/ay. .... ..... 79 Jan, 70 Feb,

77 Mar, 70 Apr,70 May,61 J.\.me, p5 July, 74 Aug, 68 Sept, 62 Oct, 63 Nov, 66 Dec

VHF Bands by Ron Ham ............ ;........ 80Jan,72 Feb, 79 Mar, 74 Apr, 73 May, 63 June, 66 July, 75 Aug,

71 Sept, 63 Oct, 64 Nov, 70 Dec TV by Ron Ham.. .... ...... ... .. .. ............ 85 Jan, 76 Feb,

81 Mar, 76 Apr, 76 May, 67 June, 70 July, 79 Aug, 73 Sept, 680ct,68 Nov, 72 Dec

NEW BOOKS ALidioAmplifier Construction '

by R. A. Penfold. . . . .. .... . .... . . . .. ...... . ..•.. . 38 May BASIC and FORTRAN in Parallel

by S. J. Wainright &A. Grant .. , .... .. ... , ... 37 June Operational Amplifier Experimental Manual

by G. 8. Clayton ...... ; .. ... : ... ...... ; ...... ;. 38 May Questions and Answers Videocassette

Recorders byEugene Trundle... .... . .. .. . .38 May 25 Simple Amateur Band Aerials

by E. M.Noll .......... ... ........ c ..... :....... 38 May 25 Simple Shortwave Broadcast Band Aerials

by E. M . Noll ........... .... .................... 37 June 30 Solderless Breadboard Projects-Book 2

by R. A. Penfold ... .. .... .. ........ .. .... .... . .. 37 June

PRODUCTS by Alan Martin Alan Hooker (Electronics)-

Morse Code Cards ... . : .. ... ... ....... .., .. . . Amateur Accessories-PEP Conversion

Module .. ............. . . . .... . .. . . .. ....... . ... . Ant Products-Amateur Station Log Book . . , Armon Electronics-Economy DMM ... ... .. . . Armstrong Kirkwood Developments- .

VHF/ lJHF Absorption Wavemeter .. ........ . Aspen Electronics-CompactDFM .. .. , ..... ; . Black Star-Low Cost Function Generator . . . Boldfield-JupiterAce Computer c •••• • : •• •••• •• Bridage Scientific Instruments-

New British Oscilloscope . ... ........ .. .... .. . Britool-Versatile Screwdriver. . . . . . . . . .. .. : . Cambridge kits-Antenna Tuner Kit ...... .. . . . c.a(efree Sales-.-Portable Lead-A~id Batteries Commutech {Devon)-General Coverage

Receiver Kit .................. . .............. . . . Copperfoi/ Enterprises-Copperfoil Tape ..... . Cravenminster"'7"2 7 / 934M Hz CB Transceiver CQ Centre~ 1 . 3G Hz ATV Converter ... ..... .. . . Datong Electronics-Radio OF System ..... ' ..


18 Dec

48 June 52 Jan 50 July

51 July 32 May 35 Nov 32 May

38 Apr 32 May 51 July 52 Feb

49 Aug 49 June 22 May 50 July 38 Apr

Davtrend-DC to DC Convert·ers . . . ... ..... . . . . Davtrend-Preset ATU for 144M Hz . ...... ... . Electronic Brokers- New Generation DMM . . Gamma Aerial Products-144M Hz Antenna. Garex Electronics- SX-400 Scanning

Receiver .. . . . .. ... . ...... ... . .. ...... · · ··· ····· .

Gunson's-Glass Fibre Cleaning Pencil .... ... G.W. Morse Keys-Brass Reproduction

Morse Key ......... .. ............ . ....... ·· .... . Halba r- 144MHz Double Quad-Yagi

Antenna ... . ........ . ..... . , ...... . ..... . ..... ,. J . Melvin G3UV-RTIY Terminal Unit .. .... .. JVL El ectroni cs- lOG Hz Transverter ... . ..... . JVL Electronics- lOG Hz Waveguide Feed .. . Kaine Kinetics Water-Slide Trans ...... . .... . . . Lascar Electronics-DPM with Digital Hold .. Lowe Electronics-Coaxial Switch ..... , ..... ,. Lowe Electronics-- LS-202E Hand-Held

144MHz Multi-mode Transceiver .. ... ... .. , Marconi Instruments-20GHz Frequency

Counter .... . ..... .. ...... . ........ . ..... ··· .·· · . MET Antennas-432 MHz Antenna . ......... .. MuTek-144MHz MastheadPre-amp .. .... .. Northampton Comm unications-Top-Band

Mobile/Base Transceiver .......... . ....... .. . Panasonic UK-RF-B600LBE Portab le

Communications Receiver ... .... . .... .. . ... . Paul Sergent- Cavity Wavemeter .... .. . ..... . p, H, Scientific Products-Computer Console Power International- Mains Filter Plug ..... . . Ray- lift-Mobile Generators ... .. .. . .. .... .. ,. Scarab Systems- 481< Spectrum

RTIV Program ........ . ... .. .. ...... .. ...... . Scarab Systems- 48K Spectrum SSTV

Program ....... . ...... , .. . ..................... . Selectronic-934M Hz Base Stat ion .. .. ...... . Sharp Electronics-All -Band Receivers ... ,. ,. Siemens-TDA4292 Stereo I C ..... . , .. ..... . , Signal Technology- SAW Technology . ... ... . Sinclair Research--Pocket-Sized TV .. ... ...• , SMC- FT-203R Hand-Held 144MHz

Transceiver . .... .... . , ........... .. . . .. ... ... ,. , SMC- FT-209RH Hand-H eld 144MHz

Transceiver " ........ .... ... .... . .... . . . . ...... . SMC- Loop Quad Antennas ........... .. . .. .. SMC--Mini Mains Charger ...... . ... ..... .. ... . SMC- MS-8400 Scanning Receiver and

FU-200 Antenna Rotator . .. ... , .. .... ...... , . Solent Scientif ic- l ·3GHz ATV Products .... . South West Aerials- Band I TVDX

Antennas . . ..... . ... .. . .. .. ... ... .... ..... ... .. . Sou th West Aerials- VHF Band 11 "Halo"

Antenna .. .. .. .. ........... , . .. .. . ....... ... .. , Telecomms-934MHz Transceiver

and Accessories . ..... . ...... ... ............ . . . Teleproduction Tools-Temperature

Controlled Soldering Iron ; ..... .............. . Thanet Electronics-IC-02E Hand-Held

144M Hz Transceiver .. .. .. ... .. ...... . ....... . T. P. Forms-G4VQS Check Log Book. United Components- Data Books .... .. ... . . . . Waters & Stanton Electronics-

Microphone Adaptor .. .. .. .... . ........ ...... . West Hyde Developments-Desk-Top Cases West Hyde Developments-New Desk Cases West on Developments-Audio Monitor ..... . R. Withers Communications-

Flexible 144M Hz Antenna . ..... .. .... ... ... . WPO Communications-Talking Frequency

Meter ... .... ........... . .... .. ............ . . .. ..

50 Aug 34 Nov 52 Sept 51 July

52 Jan 49 Aug 35 Nov

18 Dec

18 Dec 19 Mar 49 June 34 Nov 18 Dec 52 Sept 20 Mar

48 June

51 Sept 38 Oct 20 Mar

59 Apr

51 July 49 Aug 50 July 20 Mar 53 Jan

53 Feb

38 Oct 50 July 53 Feb 22 May 51 Sept 53 Jan

59 Apr

38 Oct 49 June 32 May

52 Feb 50 Aug

32 May

52 Jan

34 Nov

49 June

52 Jan 50 Aug 53 Feb

52 Sept 52 Feb 50 Aug 53 Feb

22 May

35 Nov

79

MISCELLANEOUS CONVENTION REPORTS

Benny . .. . . . . . . .. . . ... . . . . . . .. . . ... ... .. .. . . . . . . 67 Jan, 59 Feb, Communications '84 Report ..... .... .... . .. .. .. 31 Mar, 38 Apr, 78 May, 44 June, 54 July, 74 Sept, Midlands VH F Convention Report ... .. . . ... . .. .

70 Oct, 21 Nov, 37 Dec Cartoon-Spacewalk ... . .. ....... . .... . .. . . . .. .. .. . . 31 Feb

WARC '84-Conferenceor Confrontation by Peter Laughton ..... ... . . .. . .... . ...... . ... .

Did You Know? ... . .. . . . . ... .47 Jan, 71 Mar, 44 July, 48 Aug 1984 BATC Convention Report News ...... . . . . , . 22 & 63Jan, 18 Feb,51 & 57 Mar, 18Apr, by Co/in Redwood & Tony Marsden . .. ... . .

20 & 63 May, 18 & 70 June, 19 & 30 July, 18 Aug, 19 Sept, 19 Oct, 22 Nov, 50 & 76 Dec

Obituary-Harold Cottam .. . .. . .. ......... .. .. . . 52 Sept Out ofThin Air... . ..... . . .... . ... ..... ... .... ... .. 38 Mar Passport to Amateur Radio .... . . ... . . .... . . ... 62 Feb, 38 Mar

SUPPLEMENTS etc. Special Features

PW Programs ... .. . ... . . ... 25 Mar, 69 June, 43 Aug, 27 Oct, Datacard "70cm Repeaters" ... ... . .... . ...... . . . PW Publications ... . . . . . . .. 60 May, 38 June, 32 Aug, 36 Oct,

32 Nov Kindly Note

PW "Computing in Radio" Free Magazine PW RUIS .. .. .. . .. .. .... . . ... 18Jan, 18 Mar, 18 May, 18July, Summer '84 .. . . . ... . . . ............ . .. . ...... . . .

18 Oct, 18 Dec Readers' Letters........... . 33 Jan, 31 Mar, 27 & 63 May,

31 June, 72 July, 37 Oct

Autumn '84 ...... .. ...... .. . .. .... ... .... . ... .. QRP 144MHz Contest ..... ... .... .... .. ........ . QRP Contest Results by Neill Tay/or . ..... ... . .

Subscriptions . .... .. ......... . ..... .. .... . ... . .. .. .80 Dec, Swap Spot . . . . 38, 59 & 70 Jan, 58 & 78 Feb, 32 .& 67 Mar,

27 Apr, 51 May, 39 June, 24 July, 65 Aug, 50, 55 & 59 Sept, 23, 32 & 70 Oct, 39, 46 & 49 Nov, 39 Dec

Things People Say .. . ..... . . . .. . 56 Mar, 78 Apr, 62 & 80 Aug,

Radio Data-Pull-out Feature

Index


32 Sept, 48 Oct Volume 60 Jan- Dec 1984 ...... .. ...... .. .. . .. .

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39 Mar 39 Apr 39 May

77 Dec


PW 1980 12 80PW 1980 12 81PW 1980 12 82PW 1981 12 79PW 1981 12 80PW 1981 12 81PW 1981 12 82PW 1982 12 73PW 1982 12 74PW 1982 12 75PW 1982 12 76PW 1983 12 83PW 1983 12 84PW 1983 12 85PW 1983 12 86PW 1983 12 87PW 1983 12 88PW 1984 12 79PW 1984 12 80PW 1984 12 81PW 1984 12 82

¥olume56 january to december 1980 .......8,3 mar. 83 apr. 75 may. 81 june. 67 july. 71 aug, . u '...

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