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FREE SCANNER! WHAT SCANNER CompensiveAT AUTUMNt99t available makesd etads o1 INSIDE WHAT IS A SCANNER? The scannerexplained COMP TITION 16 -page Entere4,d scanner win an AR -2000

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o 5XX WONDER STATION The Story of Daventry SIMPLE RTTY TERMINAL UNIT Build This Simple Receive -Only Project

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(Next Issue on sale NOVEMBER 28) Ñco Educational Software for Basic Electronics - 9 EDITOR: Dick Ganderton, C. Eng., MIEE, G8VFH J.T. Beaumont G3NGD ART EDITOR: Steve Hunt NEWS & FEATURES: Elaine Richards G4LFM 14 Improving Short Wave Broadcast Reception TECHNICAL ARTIST/PHOTOGRAPHER: Rob Mackie R.A.W. Hill GMOIJF

CE EDITORIAL 16 Tuning in to the Secret Broadcasters- 2 Enefco House, The Quay, Gerry L. Dexter Poole, Dorset BH15 1PP TEL: (0202) 678558 23 Switched Attenuators : (0202) 666244 Phil Townsend CREDIT CARD ORDERS: (0202) 665524 (Out of hours service by answering machine) 7 50 Countries on the 144MHz Band- 5 P.E.W. Allely GW3KJW ADVERTISEMENT DEPARTMENT ADVERTISEMENT MANAGER 322L0 is Calling Again Roger Hall G4TNT Jack Hum G5UM TEL: 071-7316'222 FAX: 071-384 1031 34 NRD-535 Communications ADVERTISEMENT PRODUCTION (Poole) Receiver Marcia Brogan Mike Richards G4WNC

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(D PW PUBLISHING LTD. 1991. Bernard J. Greatrix G4ICZ Copyright inall drawings, photographs and articles published in Short Wave Magazine is fully protected and reproduction or imitation in whole or in part is expressly O forbidden. All reasonable precautions aretaken by Short Wave Magazineto ensure that the advice and data given to our readers is reliable. We cannot however guarantee it and we cannot accept legal responsibility for it. Prices s are those current as we go to press. Short Wave Magazine is published monthly for $40 per year by PW 16 -page pull-out Publishing Ltd., Enefco House, The Quay, Poole Dorset N BH 15 1 PP. Second class postage paid at Middlesex, NJ. What Scanner Postmaster: send address changes to C & C Mailers magazine International, 40 Foxhall, Middlesex, NJ 08846.

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Cover: A new WHat'SCANNER receiver from JRC is tFREEINSIDE 51 Airband 15 New Books ..T.,. 48 Amateur Bands Round -up 6 News always of interest N MAT 44 Bandscan - USA 18 PCB Service and this month Mike MA4A21N[ 74 Book Service 42 Propagation CZ.b.. Richards has 54 Decode 18 RadioLine ..... 49 reviewed their DXTV Round -up 7 Rallies 2 Editorial 47 Satellite TV News latest offering - the E 4 Grassroots 52 Scanning NRD-535. 57 Info in Orbit 2 Services Also inside is What cu 76 Index to Advertisers 43 SSBUtility Listening 5 Junior Listener 41 SWM Subscribers' Club Scanner, our annual 2 Letters 79 crs r Trading Post look at this popular 61 Long Medium & Short 65 Watching Brief segment of the

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1 SWM SERVICES The October issue of Short Wave Magazinewas the Subscriptions largest ever produced. Subscriptions are available at£21 per Including the free, pull-out annum to UK addresses £23 in Europe International andE25overseas. Subscription copies magazine and the covers it are despatched by Accelerated totalled a massive 100 Surface Post outside Europe. Airmail pages. rates for overseas subscriptions can This month we have bequoted on request.Joint another bumper 100 -page subscriptions to both Short Wave issue for you. Last Magazine and Practical are November we produced available at£34(UK) £37 (Europe) and the first What Scanner £39 (rest of world). magazine and this month we have put together another issue for you. You Components for SWM will find it stapled into the Radioline is SWM's own Unfortunately Simon Projects centre of the issue. weekly telephone Spanswick's regular In general all components used in In the coming months I information line giving you propagation report has had constructing SWM projects are have even better and the latest news of radio to be suspended available from a variety of component brighter things planned for happenings and rallies. temporarily, but a report suppliers. Where special, or difficult you. I intend to keep SWM Since it started 100 for the DXTV enthusiast, to obtain, components are specified, the biggest and best radio weeks ago it has provided by Tim Anderson, a supplier will be quoted in the article. enthusiasts magazine on developed into a useful is now a regular feature. The printed circuitboardsfor SWM the newsagents' shelves. source of information. Full details on page 18. projects are available from the SWM PCB Service.

Back Numbers and Binders Dear Sir Limited stocks of most issues of SWM Sitting at breakfast with my won the pools I doubt ifI for the pastfive years are available at newly arrived copy of SWM, I would have been more excited Why is the Short Wave £1.80 each including P&Pto addresses turned to page 12. My that the first time I winkled Magazine, Alice Springs and Tennant at home and overseas (by surface Weetabix went soggy with Now at its very best? fright and my tea turned cold Creek out of the nether. mail). As each month we proudly - on the spot!I re -read the The world of Ian McFarland Binders, each taking one volume feature on the future of short struck terror in my heart! No Read it, thus invest. of the new style SWM, are available wave radio and still could not more fading? No more co - price £5.50 plus£1 P&P for one binder, believe what I was reading. channel interference? This is It suits the short wave listener - £2 P&P for two or more, UK or As a young boy, I well the very essence of s.w.l. Around this monitoring nation. overseas. Please state the year and recall the thrill of reading off coming under attack! What Not too technical; - informative! volume number for which the binder is those strange names from the fun will there be in picking up required. Prices include VAT where dial and the three minute wait digitalised super signals from An excellent creation. appropriate. while the set warmed up. I sat a lump of solid state gubbins Orders for p.c.b.s, back numbers, for hours listening to the faint floating around in space? Will We!! The silent ones - no ticket every radio signal now binders and items from our Book monotonous tones of what I to talk, now know was Shannon become 'DX' simply because it Service should be sent to PW So we have `little' voice - Volmet, wondering at the comes from thousands of Publishing Ltd., FREEPOST, Post Sales hissing and crackling sounds miles above the earth? We're not all born talkative - Department, Enefco House,The Quay, that came from out of the Perhaps I am getting old, So listening is our choice. Poole, Dorset 8H15 1PP, with details skies. Now I am told that all anachronistic and behind the of your credit card or a cheque or this may be a thing of the past. times. Am I wrong in seeing So with a good - postal order payable to PW Publishing I re -discovered short wave s.w.l. as a challenge? I don't And a good report as well - Ltd. Cheques with overseas orders listening a couple of years ago think so. I have a hobby that is You'll always end up satisfied - must be drawn on a London Clearing and found that the thrill of absorbing, exciting and Bank and in sterling. tuning to a radio station from challenging. It is safe (barring With a welcomed QSL. lightning strikes), enjoyable, Credit card orders (Access, the other side of the world had not diminished over the years. cheap and (as I keep telling the Mastercard, Eurocard orVisa) are also Anon 4-9-91 Being that much older, I find it wife) keeps me out of the pub! welcome by telephone to Poole (0202) a challenge to try and get the So come on s.w.l.s - let's 665524. An answering machine will best from my radio and start a 'Down with DBS' accept your order out of office hours. antenna. I fiddle and alter, add Group. Long live fading and bits and take bits away, much co -channel interference! the same as a car enthusiast Ron Galliers does with his engine. IfI had Islington

2 Short Wave Magazine, November 1991 Dear Sir /Ike) **c~/Arr-7,-- The letter from B J Priest, Cleveden referring to the RAF h.f. receiver R1084 used at IF YOU HAVE ANY POINTS base stations in WWII revived Dear Sir OF VIEW THAT YOU many memories. I'll try and keep this as short as possible In 1939 I was called up from Beware of the repair.I own a Trio R5000 receiver which went WANT TO AIR PLEASE the RAFVR to serve in the RAF faulty early last year, brief description of symptoms....display WRITE TO THE EDITOR. IF as a Wireless Op/Mechanic going in line of dots and no signal strength reading on S -meter (it and became acquainted with received Radio 4, etc!). Sometimes it would suddenly burst into YOUR LETTER IS USED the R1084 within a few months life when it had been switched on an hour (not much use for YOU WILL RECEIVE A £5 of entry, on a 'Battle of Britain' instant logging). So last July, fed up with all this, I and the wife VOUCHER TO SPEND ON fighter station. If my memory took it back to the dealer and explained the situation whereupon serves me right it had 13 they kept it and after a month I got it back with a bill, but it was ANY SWM SERVICE. valves, accessible via the no better. So a fortnight later it went back again and again it heavy lift -up lid of the metal came back no better. By this time I had been told there was cabinet. nothing wrong with the receiver, yet my wife and friends had The Editor reserves the The answer to his question seen quite well what was happening. So off it went again and right to shorten any letters as to how we managed when was away so long I threatened to have it back and send it back to for publication but will try the T1085/1190 Kenwood in Japan. So the dealer said they would contact them drifted off frequency can best and in the meantime loan me another receiver as they could not not to alter their sense. be summed up by saying 'with find anything wrong with mine. But the receiver I was loaned was Letters must be original difficulty and patience, plus a like comparing a moped with a Rolls! Anyway, by now it was couple of good ears'. On some Xmas and I decided one way or another I was going to have the and not have been shifts of duty I used to take 5000 back - repaired or not. So by the middle of January I had got submitted to other c.w. messages from the Air it back - and you've guessed - the problem was still there, but I magazines.The views Ministry. Other duties involved had to tell the dealer it was OK because they obviously were not RT operating to the fighter going to repair it. So I sent back the loaned receiver and left it at expressed in letters aircraft (Spitfires/Hurricanes) that even though I was unhappy with the situation. So in six published in this magazine and servicing the TRXs (Type months I'd had the the receiver for just six weeks, got all sorts of TR9). In this connection I recall paperwork saying what had been done to it and also travelled are not necessarily those the introduction of a 300 miles in trips to and from the dealer to no avail. of Short Wave Magazine. modification to prevent the By June this year the receiver was taking up to two hours or pilot leaving his set on in the longer to come on - sometimes it would burst into life if it was 'transmit' mode. It meant thumped because by now I wasn't bothered as it was bin Dear Sir fixing a length of strong material and no use for the job it's got to do. What a most useful elasticated cord to the 'send/ One Friday, at the start of July, one year on, the wife and I contribution Bill Wilson's receive' lever so that it had to took our lives into our hands and removed the top to be was in your August issue. I be held against tension when confronted by something we knew nothing about. With the have always found it transmitting! receiver on and a plastic knitting needle we touched all curious why manufacturers Later, moving into Bomber connectors in sight and pulled all the visible wires. Lo and behold of battery do not Command involved servicing we could make the receiver go on and off, signal strength wise, build in self-contained RX1082 and TX1083 and later at will. Then, five minutes later, we suddenly realised what it chargers such as that in his the R1154 and T1155 - of was. On the front of the circuit board at the back of the display modification. For nearly 20 which good examples can be there are two miniature phono plugs and these were causing all years, I suppose, I have had seen today at the Hall of the problems by not making circuit properly, So I pulled them a Sony CF -420L, radio - Aviation in Southampton. out, sprayed them with Servisol and the receiver has worked like cassette to which I cling Other receivers I used during a dream ever since. because it has this facility. my service on operational Ken Lancaster W.H. Rees circuits were the Marconi Barnsley South Godstone CR100 and the American (RCA) AR88 and (National) HRO. Like the R1084 they were Dear Sir built to last and did a What are the BBC up to? I will try to be brief. wonderful service both prior The long wave station closes for days, the m.w. band is being chopped and givenover to to, and after the war. advertising, the BBC has begun advertising. The BBC now runs a hype for the f.m. band which Although much later on I is actually untrue. As you know the international agreement is that stations should be in moved into higher echelons channels of 9kHz. In the m.w. band the transmitters have side -splash which spreads to 15kHz. via Cranwell, I reckoned that As you know the Irish station swamps us and blocks Algeria, Finland and Denmark. those early days in the ranks The s.w. bands are swamped and many are illegal. Often I have heard three using thesame were the most interesting and frequency. rewarding on many counts. The BBC hypes the f.m. band from 85 to 108MHz, but the BBS compresses modulationto My station avoid overloading and also to narrow the band. The BBC also cross band beams from the (G3VD) was closed down by same antenna. the authorities within days of Here the f.m. band occupies at least 4MHz for each beam. On 103, 105 and 108MHz all the declaration of war and it three beams are mixed. And the range of f.m. is around 60-80 miles. I have talked to the BBC was only in February this year engineers here and they have admitted this. that I had my old licence I am getting suspicious that I am being softened up for the BBC to begin to suggest that renewed. I am now looking they might boost income by taking in advertising and that the f.m. band might supersede the forward to being active again m.w. band and in time the I.w. dropped. on the h.f. amateur bands. The Daventry transmitter has stopped s.w. signals and the transmission takenover to B.A. Pettit Woofferton. Southampton John D Berridge, Cardiff

Short Wave Magazine, November 1991 3 Club Secretaries: r=70P-7V 30P) C Ls Send all details of your club's up-and-coming events to; 'Grassroots', Acton, Brentford & Chiswick RC: 3rd Lane, Woodhouse Road, Mansfield. Tuesdays, 7.30pm. Nov 20 - Feeding Nov 7- The Shortwave Broadcast Lorna Mower Dipole Antennas by G31GM. Paul Truitt Bands by G4GYU. Mary GONZA. (0623) G4WQ0.071-938 2561. 755288. Short Wave Magazine, Enefco House, Barnsley & DARC: Mondays, 7.15pm. Midland ARS: 3rd Tuesdays, 7.30pm. Darton Hotel, Station Road, Darton, Headquarters Unit 22, 60 Regent Place, The Quay, Poole, Barnsley. Oct28- Planning by G4GJB, Birmingham B1 3NJ. John Crane Nov 18 - Amateur Radio on a Shoe- G O LA 1.021-742 8712 (evenings). Dorset BH15 1PP string by G3RJV. Ernie G4LUE. (0226) 716339. Mid -Warwickshire ARS: 2nd & 4th Tuesdays, 8pm. St John Ambulance Bedford & District ARC: Tuesdays, HQ, 61 Emscote Road, Warwick. Nov 7.30pm. Allen's Club, Hurst Grove, 12 - Programme Discussion for 1992, Bedford. Oct 29- Social. Glenn GOGBI. 26th - HF Antennas for You by G30AY. 10234) 266443. Mike Newell. Kenilworth 513073.

Bromley & DARS: 3rd Tuesdays, Nelson & DARS: Wednesdays. 7.30pm. The Victory Social Club, LlancaiachJuniorSchool, Nelson, Mid Evening. Brian Shelton GOMEE. 081- Kechill Gardens, Hayes. Nov 19- Glam. Leighton Smart. (0443) 411736 360 2453. Stereoscopic slides by GOILW. Geof- evenings. frey Milne. 081-462 2689. Stirling & DARS: Thursdays, 7.30pm. Norfolk ARC: Wednesdays, 7.30pm. Brain Mulleady. 10324) 36235. Cheshunt& DARC: Wednesdays, 8pm. The Norfolk Dumpling, The Livestock Church Room, Church Lane, Worm - Market, Harford, Norfolk. Oct 30 - In- Stourbridge & DARS: 1st & 3rd Mon- ley, Nr Cheshunt. Nov 6 & 20 - Natter troduction to Microwaves by G4DDK, days. Robin Wood's Community Cen- Night, 27th - AGM. Roger Frisby. (0992) Nov 6 - REAL RADIO evening, 13th - tre, Scotts Road, Stourbridge. Nov 16 464795. Satellite TV by G4VCE, 17th - Surplus - Annual Surplus Sale. Dennis Body Equipment Auction doors open 10am, GOHTJ. QTHR. Conwy Valley RC: 1st Thursdays, 20th - RAYNETbyGOIYD.JackSimpson 7.15pm. The Studio, Penrhos Road, G3NJQ. (0603 747992. Stratford upon Avon & DARS: 7.30pm. Colwyn Bay, Clwyd. Nov7 - Junk Sale. The Home Guard Club, Main Road, Merfyn Jones GW4NNL, 72b Princes North Bristol ARC: 3rd Fridays. S.H.E. Tiddington, Stratford-upon-Avon. Oct Drive, Colwyn Bay, Clwyd. (0492) 7, Braemar Crescent, Northville, 28 - Oscilloscopes for Beginners, Nov 530725. Bristol. Oct 25 - Bring & Buy, Nov 1 11- Amateur Radio Observation QSL Cards and Awards 'Boast' Night, Service, 25th - AMTOR Demo. Coventry ARS: Fridays, 8pm. Baden 15th - Chips, Bytes & Solder on the Powell House, 121 St Nicholas St, Carpet by GOLOJ. J. Chris GOLOJ. (0454) Three Counties RC:Alternate Radford, Coventry. Oct 25 - Night on 616267. Wednesdays, 7.30pm. The Railway the Air, Nov 1- Bangers & Mash, 8 & Hotel, Liphook, Hants. Nov 6 - Best 22nd - Night on the Air, 15th - Mini North Ferriby United ARS: Sundays, Buys in Amateur Radio Equipment, Lectures. Coventry 523629. 8pm. North Ferriby United Football Club 20th - On the Air. Dave G4VKC. Social Room, Church Road, North Derby& DARS. Wednesdays, 7.30pm. Ferriby. Oct 25 - Basic Test Gear by Todmorden & DARS: 1st & 3rd Mon- 119 Green Lane, Derby. Richard G3TEU, Nov 1- Satellites Part 2, 8th - days, 8pm. The QueenHotel, Buckby. Ambergate 852475. Night on the Air, 15th - RFI Forum, 22nd Todmorden. Nov4- Drink Driving, 18th - Amateur TV. 10482) 650410. - Antennas. Mrs E Tyler. (0422) 882038. Edgware & DRS: Watling Community Centre, 145 Orange Hill Road, Burnt Preston ARS: Alternate Thursdays. Torbay ARS: Fridays, 7.30pm. ECC Oak. Nov 28 -The Novice Licence and The Lansdale Sports & Social Club, Social Club, Highweek, Newton Abbot. Club Participation. Hank Kay GOFAB. Fulwood Hall Lane, Fulwood. Oct 31 - Nov 22 - Communications in British 1081-205 1023). The Packet Boat, Nov 14 - An Aus- Gas. Walt G3HTX. (0803) 526762. tralian Miscellany. Eric Eastwood Fareham & DARC: Wednesdays, G1 WCQ. (0772) 686708. West Kent ARS: 3rd Fridays, 8pm. The 7.30pm. Porchester Community Cen- SchoolAnnex,Albion Road,Tunbridge tre, Westlands Grove, Porchester, Shefford & DARS: Thursdays, 8pm. The Wells, Kent. Nov 1- Informal, 15th - Fareham, Hants. Nov 6 - Coding by Church Hall, Ampthill Road, Shefford, Open Evening. John Taylor G3OHV. GOFIM, 20th - Chris G8JFJ. Rod Smith Beds. Oct 31-BarcodingforBeginners 10892) 664960. GOERS. 10705) 373572. byG1BWW, Nov21 -Junk Sale. Nigel G1JKF. 10908) 274473. West of Scotland ARS: Fridays, 8pm. Hastings E&RC: 3rd Wednesdays, Scout Shop, 21 Elmbank Street, Glas- 7.45pm. West Hill Community Centre, South Bristol ARC: Wednesdays. gow. Oct 25- CW NFD 1982 video, Nov Croft Road, Hastings. Fridays, 8.30pm. Whitchurch Folkhouse Assoc, Bridge 8 -Is the RSGB Losing Credibility? Ashdown Farm Community, Downey Farm House, East Dundry Rd, Debate, 22nd - Regional Emergency Close, Hastings. Nov 20 -Infra -red Whitchurch. Oct 30 - Conquering TVI Planning Communications. Ja ck Hood. Imagery by David Watson. Reg Kemp. by G4VBU, Nov 6 - Bring & Buy, 13th - 10698) 350926. 7 Forewood Rise, Crowhurst. Simple Computer Programming by G4RZY, 20th - Free Ice-cream Evening Wirral ARS: 1st & 3rd Wednesdays, Keighley ARS: Thursdays, 8pm. The with G4YZR. Len Baker. Whitchurch 7.45pm. Ivy Farm, Arrowe Park Road, Cricket Club, Ingrow, Nr Keighley. Oct 832222. Birkenhead,Wirral. Nov 6 -Chairman's 31- Junk Sale, Nov 7 & 21 - Natter Night, 20th - Packet Radio Cluster. Night, 14th - . Kathy Bradford. Southgate ARC: 2nd & 4th Thursdays. (0274) 496222. Winchmore Hill Cricket Club Pavilion, York ARS: Fridays, 7.30pm. York City Firs Lane, Winchmore Hill, London Social Club, Bootham Crescent, Mansfield ARS: 1st Thursdays, 8pm. N21. Nov 14 - Construction Judging York. K.R. Cass G3WVO. 4 Heworth The Polish Catholic Club, off Windmill for G6QM Trophy & Brains Trust Village, York. 4 Short Wave Magazine, November 1991 itzrzil /I/ii'S *- ~~/zP

Radio Japan Radiocommunications Agency I received a very interesting information pack from Radio Japan I though you might be interested to hear about some of the work that I though I'd share with you. The carried out by this government agency. The agency is closely linked station is very keen to receive QSLs to the Department of Trade and Industry and basically looks after the Jon Jones and even send out a special Air Mail in the UK. As well as looking after the issue of PO Box 59 QSL sheet. In addition to simple licences, it also has a very active investigation service. This is known Fishponds signal reports, they are keen to as the Radio Investigation Service or RIS. It's main job is to make sure Bristol BS16 4LH receive suggestions for programme that licensed radio users can operate free from interference. The RIS material. Radio Japan is similar in have a very difficult task as more than 225,000 licences have been some ways to the BBC World issued. Service as its main aim is to improve Tracking down interference can be a very tricky operation and the understanding between Japan and RIS have a special mobile team with equipment for taking other countries. They claim not to measurements at frequencies up to 75GHz. The largest part of the get involved with the propaganda mobile team's work is tied up, not surprisingly, with and biased news that some stations problems. transmit. One programme of When investigating problems on the h.f. bands the Radio particular interest is called Hello Monitoring station at Baldock in Hertfordshire plays a major role. This From Tokyoand is transmitted on station is continuously manned and provides assistance to foreign as Sundays. During this programme well as UK operators. readers letters are read and In addition to its regulatory role, the Radiocommunications questions answered. They even Agency plays an important part in the development and trial of new include the occasional live radio technologies. interviews with listeners. The As part of their Annual Report they publish a variety of statistics transmission times for this showing how the radio spectrum is used. One area that I found quite programme are 0515, 0715, 1115, staggering was that 37% of the spectrum between 30kHz and 1 GHz is 1415, 1715 and 2315UTC. The dedicated to fixed and mobile links for the government! frequencies to check for European If you'd like any more information the Radiocommunication reception are: 21.575MHz and Agency can be contacted at: Waterloo Bridge House, Waterloo Road, 11.735M Hz. London SE1 8UA.

Junior Letters Fourteen -year -old Ian Wishart from like to start with antennas. This is other structure without help from 6190kHz, R Switzerland, 2130, Northants has been interested in one of the best places to start as your parents. 32333 radio for about eighteen months. His you can experiment very cheaply. 2: Always keep antenna wires 5930kHz, R. Prague, 2015, 53434 interest was sparked off while All you really need is some wire and well away from all other wiring. 9765kHz, Spanish R, 2128, 42333 listening to the BBC World Service a little co-operation from your 3: Don't run antennas above 9900kHz, R. Cairo, 2254, 32332 on the car radio during his holiday parents! The popularity of do -it- power cables -if the antenna 9675kHz, R Polonia, 2256, 44444 in France. On his return, he visited yourself antennas can be gauged by breaks it could contact the power 11735kHz, R. Belgrade, 0022, the BBC's headquarters at Bush the vast number of books on the cable with disasterous results. 33544 House in London - an experience subject. Personally, I would Returning to Ian's listening, he 11705kHz, WCSN, 0813, 34444 that boosted his interest. His first recommend that you start by using relies on books and of course the 11705kHz, WSHB, 0612, 23323 reference books comprised Dial insulated multi -stranded wire. The magazine to guide him in his 13770kHz, WSHB. 2025, 34444 Searchandthe International Radio reason for this is that it's very listening. One interesting source of 13695kHz, Deutschewelle, 2110, Station Guide. flexible and can be made almost information that he uses is the 23322 Ian is interested in all aspects of invisible when mounted outside. If engineering information pages on 13605kHz, UAE Abu Dhabi, 2315, the hobby from local radio through you want to be scientific in your Teletext. 34343 to amateur radio and general short experiments it's a good idea to keep Chris Bazley of Rayleigh is also You will see that Chris has used wave listening. However, he has yet notes of the basic antenna and the fourteen years old and has the SINPO reporting system that I to build up courage to send a QSL. changes you make. You can even collected more than twenty QSL covered back in the March 'Junior On this point, I would strongly make use of the report writing cards from broadcast stations all Listener'. I would strongly recommend that he has a go. One of techniques you've learnt at school! over the world. His present station recommend that you adopt this the benefits, especially with The simplest type of antenna to consists of a Panasonic RFB-40L system for your loggings as it is broadcast stations, is that you start with is a straight forward long receiver with a 20m long wire accepted throughout the world. This normally get all sorts of information wire. This consists of a random antenna. Chris has sent me a is particularly significant when included with the QSL card. At the length of insulated wire. This should sample log covering just over one QSLing with commercial stations. very least you will find the station be as long as possible and week thatI think may be of interest The final letter for this month schedule very handy. preferably in a straight line. to others. I shown it here as comes from John McElhinney of Like many junior listeners, Ian's However, don't be frighted to frequency, station name, time and Letterkenny in Eire. John has written shack is set up in his bedroom and include bends if you need to. the SINPO report: requesting the sample log sheets I comprises a Saisho SW -5000 short Throughout all your experiments it's 5955kHz, R. Netherland, 1430, mentioned recently. His receiving wave receiver and the very popular vital that you observe a few simple 44444 set-up comprises a Trio 9R-59DS AOR AR -1000 scanner. Ian feels that safety points: 6065kHz, R. Sweden, 1717, 42433 communications receiver and a 30m he still has much to learn and would 1: Never climb a ladder or any 6174kHz, R. France, 1605, 43343 indoor long wire antenna.

Short Wave Magazine, November 1991 5 Broadcasts to Yugoslavia

The BBC World Service is New Panasonic 15in Both TVs feature the Invar particular year. The calendar splitting its Serbo-Croat output TVs Mask Tube, which brings has a 200 year scan. into separate Serbian and exceptional brightness and These models will be Croatian transmissions from The TX-15MIT and TC-15MIR clarity to the users screen. A available from October 1991 the end of September. This are new models from 15% brighter screen and no from authorised Panasonic means that the BBC will then Panasonic which boast doming, even at high current. dealers nationwide. The TX- be broadcasting to Yugoslavia excellent picture and sound These new models also 15MIT will sett at about in three languages in addition quality and incorporate an offer excellent sound quality. £299.96 and the TC-15MIR to English. It has been array of new useful functions - This is achieved by the 'Top about £249.95. broadcasting separately in including calculator and Dome Sound System'. By Slovene since WWII. The latest calendar facility. Designed incorporating a speaker box The Valve change was planned in with the audio-visual user in and grill in the top of the Catalogue January and comes into effect mind, both televisions have television, the sound is on September 29. the relevant connections for projected from the top of the This catalogue will be The move will be wel- compatibility with most unit. available soon from The comed by potential editing equipment. With the on -going quest to Vintage Wireless Company rebroadcasters in Yugoslavia They are both equipped provide users with 'user- Ltd and will cost £2.00 post who require separate Serbian with a new Z-4 chassis, which friendly' equipment, paid UK or £3 post paid and Croatian programmes has been purposefully Panasonic have incorporated overseas. The cost is refund- rather than the combined developed for these latest both calculator and calendar able with your first purchase. Serbo-Croat output that the models. This new chassis, for facilities. The remote control There will be valve lists BBC has traditionally broad- the first time, has allowed unit features a 'menu' button. and prices, equivalents cast on short wave. Five radio Panasonic to incorporate By pressing this and then (including rare European), stations in Slovenia already re- 'Fastext' on a 15in screen (TX- selecting Calculator, the user military code explanations broadcast BBC Slovene 15MIT only), thereby giving has all the usual calculator (USA, RAF, Army & Navy), programmes but none in users access to useful infor- functions on the screen. The used valves available, valve Croatia or Serbia is using mation at the touch of a calendar function gives users cartons, valve holders, Serbo-Croat broadcasts. button. both the day and date of a accessories, miscellaneous, The changes will mean that valve holder guide, valve Serbian and Croatian will each manuals, etc. be broadcasting for five and a DX TV News A refund coupon will be half hours a week. Slovene enclosed with each catalogue will remain at five and three Though TVDXers have been using v.i.t.s. (vertical interval and you deduct the cost from quarter hours. Short wave test signals i.e. the series of lines and dots at the top of the your first valve purchase broadcasts will continue in all TV picture) to assist with station identification, recent made from the catalogue. three languages and the observations by Dalibor Frkovic in Yugoslavia suggests that All customers who have programmes will be beamed Arabic signals are less than certain. For example, Iran has already send an s.a.e. for from London via satellite for been seen using no v.i.t.s., thin v.i.t.s. lines and standard what was to be a normal downlinking by local f.m. and (European) type v.i.t.s. suggesting that use is random and it's valve list, and has now turned a.m. radio stations. unwise to rely too much on v.i.t.s. for identification. out as a much grander affair, The new pattern of broad- The TV2 group in Norway have been awarded the please do not send additional casts will be (local times): commercial TV franchise that will last for 10 years and hopes funds. Your s.a.e. will be 1200-1215 - Slovene; 1230- to start transmissions Autumn 1992. The new network will be accepted as payment, but no 1245 - Serbian; 1300-1315 - based in Bergen, from where the transmitter network will refund slip will be enclosed. Croatian; 1800-1830 - Serbian; expand. Meanwhile, the proposed Irish TV3 network is still The Vintage Wireless 1830-1900 - Slovene; 1900- in limbo pending amendments to the Broadcasting Act which Company Ltd. Tudor 1930 - Croatian. will remove advertising restrictions that were reducing House, Cossham Street, advertising revenue and could have made the TV3 commer- Mangotsfield, Bristol BS17 cial network unviable. At the end of August, the TV3 consor- 3EN. tium were considering putting on hold any further progress due to the poor financial conditions prevailing. MUL TICOM. EXE The Greek government is, at last, to introduce legislation in an effort to control the rash of private radio and TV MULTICOM.EXE is a program to drive an Icom radio. It requires stations that have spread throughout the country, not unlike an IBM PC, EGA graphics (256K minimum), one serial port plus Italy of some years ago. This should result in a large scale any Icom radio with a CAT port. reduction of stations, at least 26 TV stations were operating The program comes supplied with a simple interface, al- in Athens at the end of July, with scant regard to interference though any other suitable interface may also be used. It also protection. The new powers should halve the TV stations comes with set-up files for the IC -735, IC -726, IC -781, IC -765, IC - now operating and up to 75% of radio stations will also 751, IC -575, IC -275, IC -475, IC -1275, IC -R9000, IC -R7000, IC -R71 disappear. There are thought to be only 13 available chan- and a few more. These files may be altered, renamed, loaded and nels in the Athens area with ERT (the national broadcaster) saved from within the program. Also, new files may be created to taking 3, RIK (Cypriot channel) a 4th and with several main accommodate future products. satellite channels taking other terrestrial outlets. A few of the features of the program are: it operates in the Tele Piu, the new Italian broadcaster, has experienced a frequency range of 10Hz up to 10GHz, allows for frequency successful start to the broadcasting field with considerable converter/transverter use, scans up/down by the cursor keys, consumer uptake in her 3 channel subscriptions. Over scan speed and tuning step size are pre -selectable before $50million has been spent so far with a further $400million scanning, easy to use graphic program amongst other features. up to 1994. The scrambled mode used on the Pay -TV network If you would like more details on this program, which costs is the Irdeto system. Roger Bunney £50. Then contact: Ivor Mantell, 24 Bourne Avenue, Fazeley, Tamworth, Staffs B78 3TB. 6 Short Wave Magazine, November 1991 UU International Short Wave League

The International Short Wave League (ISWL) was formed in 1946 and for 45 years has provided facilities enabling members to enjoy their hobby to the greatest advantage to themselves and fellow enthusiasts. The League effectively caters for members interested in both the amateur and broadcast bands, membership being equally open to licensed amateurs and s.w.l.s. Published monthly and issued to members, the League journal Monitor includes coverage of the h.f., v.h.f. and broadcast bands, transmitting topics and general interest articles. For full details on the ISWL membership, send an s.a.e. to: Evelyn May G-17197/GOOZI, ISWL HQ, 10 Clyde Crescent, Wharton, Winsford, Cheshire CW7 3LA. Elegant Console Radio Stations in the British DX Club UK Elegant, from Bopla, is an enclosure for hand-held The British DX Club's instruments. It is moulded from high impact polysty- The 1991 edition of the Radio Stations monthly bulletin Communica- rene, with a two-tone light grey finish. The main feature in the United Kingdom has just been tion celebrated a milestone in of the new Elegant Console is a sloping display panel published by the British DX Club. The July, with the publication of that can accommodate a membrane keyboard. Also new booklet is now in its 10th edition and its 200th edition. The first is the increase in depth that allows more components to follows the successful format of issue of Communication be accommodated and makes the unit ideal for mobile previous years. It has been completely appeared back in September data acquisition equipment. revised and updated to reflect the 1974, since when it has The key area is 87 x 105 x 2mm and the display area current situation. supplied British DX Club's is 87 x 38.5mm. Mounting bosses are provided for In frequency order, the booklet lists ever expanding membership standard 16 -character and 4 -line displays. Presently, all British m.w. a.m. and f.m. radio each month with up-to-date only available in stations - both BBC and ILR - including information and tips on one size, but their location and transmitter power. broadcast band DXing. smaller versions To help with identification, each Details of membership are currently being frequency is cross-referenced to show and a sample copy can be developed. possible parallel channels. A reference obtained for return postage Bopla Ltd, section gives the full postal address from the Club Secretary. Phoenix Mecano and telephone number of each station, Colin Wright, British House, 6-7 as well as background information on DX Club, 54 Birkhall Faraday Road, the various Development licences, Road, Catford, London Aylesbury, 'unofficial' radio and reception SE6 1TE. Buckinghamshire reporting. HP19 3RY. Tel: The booklet costs £2, 5 IRCs or $4 (0296) 399 999. per copy. This includes postage world- wide. British DX Club, 54 Birkhall Road, Catford, London SE6 1TE.

or-~0/O/íá"os-373

*October 25 & 26: The Leicester *Novemberll: Bridgend rally. Further exhibition halls, Bring & Buy, talk -in March 7: The TARS annual rally will Amateur Radio Show will again be details from Charles Sedgebeer, 50 on S22, bar and restaurant available, be held as a new venue this year, the held at the Granby Halls, Leicester. Minffrwd Road, Pencoed, Mid Gla- ample free parking, concessionary Temple Park Leisure Centre in South morgan, South Wales CF35 6SD. rates to visit museum. Frank Martin Shields. Jack GODZG. Tel: 091-2651718. *November 2/3: The 5th North Wales G4UMF. Tel: (0952) 598173. Radio & Electronics Show will be held November24: The West Manchester April 5: The Launceston 6th Amateur at the Aberconwy Conference Cen- Radio Club's 'Winter Rally'. All details 1992 Radio Rally will be held at Launceston tre, Llandudno.The rally opens at 10am as August Rally. Admission £1. Dave College. Doors open 10.30am. Maggie. with the entrance fee at£1, OAPs 50p G1I00 on (0204)24104 evenings only. January26: The 2nd Lancastrian Rally Tel: (040921) 219. and children under 14 free of charge. will be held at the University of Lan- Siggy Fergusson GWODYH. Tel: (0492) December 1: The Bishop Auckland caster. Doors open 10.30am for the *June 14: The Royal Naval ARS will be 532459(day). Tony Wilkinson RAC are holding their rally at the Sun- disabled and 11am for everyone else. holding their annual rally at HMS GW4PVU.Tel:(0492)49121(evenings). nydale Leisure Centre, Shildon, Co. Sue G1OHH. Tel: (0524) 64239. Mercury, near Petersfield, Hants. Durham. Doors open 11am (disabled G.3tes open from 10am to 5pm. Cliff November10: Barnsley& DistrictARC 10.30am). GOFBK. Tel: (0388) 606819. February 16: The Kidderminster & H;:rper G4UJR. Tel: (0703) 557469. will be holdingtheirfirstRadio Rally at DARS rally will be held at the Harry Willowgarth Senior High School, Bri- *December 15:The Centre of Cheshire School, Habberley Road, November 28: The Greater London erley Road, Grimethorpe, Barnsley, Amateur Radio Rallywill be held atthe Kidderminster, Worcs. Doors open Amateur Radio & Computer Show will South Yorkshire. Details and trade British Motorcycle Museum, Bicken- 10am. G8JTL. Tel: (0384) 894019. be held at Harrow Leisure Centre, enquiries from Ernie G4LUE, 8 Hild hill, near the NEC Birmingham (junc- Christchurch Avenue, Harrow, Mid- Avenue, Cudworth, Barnsley, South tion 6 M42). Doors open 10.30am, ad- February 23: The Northern Cross Ra- dlesex. Doors open from 10.30am to Yorkshire S72 8RN. Tel: (0226) 716339 mission £1, OAPs 50p, children free. dio Rallywill be held atRodilian School, 4.30pm. CLPK. 18 Litchfield Close, (6-8pm). Over 60 trade stands in three large Lofthouse, West Yorkshire. Clacton -on -Sea, Essex C015 3SZ. * Short Wave Magazine & Practical Wireless in attendance*

Short Wave Magazine, November 1991 7 When you are ready to graduate to real listening Lo .k to Lowe

The NRD-535 witha subtle difference

The NRD-535 is accepted as one of the outstanding HF Each NRD-535 which has our upgrade treatment receivers in the world and we, at Lowe Electronics, are also has a pre -aging period for settling down the proud to be a JRC specialist distributor. master reference oscillator and a careful check of Good as it is, we felt that even the NRD-535 could be detailed alignment to ensure that the "Lowe" NRD- "breathed on" and we have produced an upgrade series 535 is as near perfect as any receiver can be. of modifications which makes the NRD-535 into a real You CAN tell the difference with your ears. Contact stunner. us for details and cost of this worthwhile step-up The improvements include a specially designed high- for the NRD-535; available from Lowe Electronics performance IF crystal filter, detailed flattening of the only. audio response, a completely new higher -power audio output amplifier and, if the ECSS unit is fitted, modifica- tions to the PLL system giving greater lock stability. HF-225 Gateway to the World

* 30kHz - 30MHz * Tunes in 8Hz steps. * 30 memory channels * IF filters for all modes already fitted * Keypad & tuning knob freq. control * British designed & built by Lowe * Voted 'Receiver of The Year' by WRTH * Optional AM/FM Sync. Detector * Optional keypad for remote entry * Excellent quality at reasonable cost * Price: £429.00 inc VAT

Send four first class stamps to cover the postage and we will send PRIVILEGE you, by return, your FREE copy of THE LISTENERS GUIDE' (2nd LCIWE MEMBERSHIP CARD edition); a commonsense look at radio listening on the LF, MF and HF bands. Its unique style will, I am sure, result in a 'good read'; but underneath the humour lies a wealth of experience and expertise. Paao¡W Number 100000 You will also receive detailed leaflets on our range of receivers and a copy of our current price list. FOR DETAILS, TELEPHONE 0629 580800 LOWE ELECTRONICS LIMITED Chesterfield Road, Matlock, Derbyshire DE4 5LE Telephone: 0629 580800 Fax: 0629 580020

8 Short Wave Magazine, November 1991 Aerial systems for Serious Listeners Look to Lowe

DX -One Electronic Antenna £254 inc VAT The World Radio TV Handbook said of the DX -One "... the best of its type available anywhere in the world." It has a frequency range of 50kHz - 50MHz (*3dB) and 10kHz - 75MHz (*6dB); it is both hori- zontally and vertically polarised, so low -angle (DX) signals suffer less selective fading. The output level from the antenna is adjustable in steps from +6dB to-40dB for optimum matching. The extremely high intercept point (+66dBm 2nd order, +40dBm 3rd order) and a very low noise figure (12.8 dB) ensure optimum performance. The indoor unit contains a mains power supply, a step -wise attenuator and a very effective medium wave suppression filter. It also has two receiver outputs for feeding two receivers without mutual interference.

SP -2 Antenna Splitter £152 inc VAT A growing number of radio enthusiasts have two receivers, but no space for two separate antennas. The SP -2 is the answer for connecting two receivers to one antenna (be it active or passive). The SP -2 offers a very high degree of isolation between the two receivers (<30 dB). The SP -2 ensures that, within the frequency range of 50kHz - 50MHz), no unwanted mutual interference, or signal loss will occur as a result of connecting a second receiver. With a single receiver, the SP -2 offers a precision step-attenuator (0 - 40 dB) which helps to reduce receiver inter -modulation. Included is a very effective switchable medium wave suppression filter. For those with space for a second antenna (e.g. one horizontal, one vertical), the SP -2 offers a simple way to switch between the two for comparison purposes.

Magnetic Longwire Balun £36 inc VAT This balun has been described in the trade press as the "most revolutionary development for shortwave listeners in the last 25 years". Quite a claim! But this antenna device does solve one of the most severe problems associated with random long wires; the input cable. An MLB allows you to use highly screened co -axial cable between the antenna and receiver WITHOUT energy loss due to impedance mismatch. Computers, light -dimmers, televisions, and fluorescent lights no longer cause interference problems. We recommend RG58/u 50ohm co -axial cable. The MLB has been designed so that a very short length of antenna wire can be used and still be perfectly matched to the 50ohm antenna input of the receiver. Even an antenna of just 12.5 metres (41 feet) provides good results from 100kHz - 40MHz without the need for an . Static build-up on the antenna is allowed to leak away to earth potential - excellent for protecting receivers with FET front end circuitry. Static noise levels on long, medium, and the tropical short wave bands of 60 & 90 metres are considerably lower. The MLB is easy to mount on existing longwire or"T" antennas.

MLB Antenna: Mark I £56 inc VAT A complete passive wire antenna with a built-in MLB, the MLB Antenna: Mark I has excellent performance on long, medium, and short waves. It is 12.5 metres in length and can be mounted vertically or horizontally. Frequency range 100kHz - 40MHz. The MLB Antenna: Mark I offers all the advantages of the Magnetic Longwire Balun like: coaxial feeder, broadband performance without an antenna tuner and static decoupling. Heavy duty and completely water -proof, it comes complete with nylon support cord, heavy-duty insulator, high -quality plastic covered antenna wire, PL 259 connector and a water -tight rubber sleeve to cover co-axial/MLB connection. MLB Antenna: Mark II £67 inc VAT Similar to the Mark I, but 20 metres long. The MLB Antenna: Mark II offers improved performance at medium and long wave frequencies, although the performance above 30MHz is reduced.

THE LISTENERS' BOOK OF THE YEAR GETS EVEN BETTER The new 1992 issue of 'Passport to World Band Radio' is now with us and it's even better than before. The 200 pages have risen to almost 400 and every section carries the unmistakable authority ofthe world's best short wave companion. Broadcasts are listed as before; not only in frequency order but also by language, country of origin AND the times of broadcasts. There are no less than 56 pages of receiver reviews, including the latest NRD-535 and Drake R-8, together with news, views and general information. If you own a short wave radio, you simply MUST have the 'Passport' by its side. The price last year was £12.95; we have kept the price exactly the same this year at £12.95 (plus £1.55 for post andpacking). Send off today.

Barry (S Wales): 0446 721304 *Bournemouth: 0202 577760 Bristol: 0272 771770 Cambridge: 0223 311230 Cumbernauld: 0236 721004 *Darlington: 0325 486121 London (Heathrow): 0753 545255 London (Middlesex):081-429 3256 *Closed all day Monday Short Wave Magazine, November 1991 9 Feature 5XX Wonder Station of the 1920s

It is now sixty-six years since outdoor antenna up to 31m station was to have a Obstructive the official opening of the long and often 12m high. wavelength of between 1400 ultra -powerful Daventry Countless such antennas, and 2000m (214 and 150kHz), At first, the Armed Services transmitter on 27 July 1925 many of them unsightly, instead of conforming to the were obstructive, as they had and most listeners could festooned the gardens and accepted 'broadcast range' of previously been to the whole henceforth tune -in an backyards of the towns. Now 250 - 500m (1200 - 600kHz), idea of broadcasting. alternative programme - the authorities were since long wave stations could Eventually, they reluctantly London - in addition to their concerned to make a be received at far greater agreed to a long wave station local station. By contemporary programme available to the 30 distances than medium wave working on 1500m (200kHz), standards, this was listening to 40% of people - mainly transmitters. The BBC applied situated north of a line from affluence. country dwellers - who could to the Post Office for a the Severn to The Wash, with In the two -and -a -half years not yet receive any temporary licence to make power not greater than 25kW. that had elapsed since the programme. experimental transmissions Until the new station was British Broadcasting Company The idea of a very high from the Marconi works at built, Chelmsford could started operations in power station that would Chelmsford, Essex, where continue broadcasting the November 1922, nine main enable people as far as 160km British broadcasting had London programme after 7pm. stations and ten relay stations away to pick up its begun. From July 21 onwards, It was decided to situate had been built around the programme on a crystal set, the London programmes were the giant station in the country. The relay stations was first put forward in relayed nightly after seven Northampton district, and BBC were low -powered December 1923. The projected o'clock. engineers were sent to survey transmitters that boosted the local programme in areas where reception was particularly poor. Since neither the transmitters nor the domestic receivers were very powerful, the owner of a radio could usually tune -in only the local station. In the south-west, for instance, this was usually Cardiff 5WA on 351 metres (854.7kHz), which was considered a somewhat high- brow station. But most British listeners hankered after the more prestigious London programme, to chuckle at the nonsense of comedian George Robey and tap their feet to the rhythm of the Savoy Orpheans dance band. Eventually, to satisfy this demand, most local programmes did include some material from London. By August 1924, about two- thirds of the population were in a position to receive their local station on a cheap and simple set, if they owned one. The BBC had always envisaged the listening public as owning simple crystal sets that required no expensive batteries or components, but A luxurious home -built crystal set having a choice of three different crystals and other operated entirely from the refinements. On top can be seen the long wave '5XX' coil that was switched in to power received from an receive Daventry. Sixty-six years later the set still works perfectly. 10 Short Wave Magazine, November 1991 Feature

Sixty-six years ago this summer, two million British licence holders twiddled the knobs of their crystal sets and primitive valved receivers with more than usual eagerness. Eric Westman tells why.

possible sites. They soon Postmaster General. To station from as far away as with a switch to enable pronounced one, at Borough commemorate the opening, 240-320km. Indeed, a large reception both of the medium Hill, 1.2km from Daventry, as the Poet Laureate, Alfred number of listeners now had waves, with their local station, 'pre-eminently suitable'. It Noyes, wrote a stirring poem, the choice of two and of the long waves - thus consisted of a flat expanse of The Dane -Tree, which was programmes. bringing in Britain's most more than 50 acres at a height broadcast. The final verse desired programme. Lacking of about 200m above sea level. went: this facility, American sets no The BBC bought it for £2670 "Daventrycalling... Saviour longer sold, and Britons freehold. Work started straight Daventrycalling... resumed buying British -made away, to be finished early in Daventrycalling... Dark and There was one very important equipment - or making their the summer of 1925. A high still. spin-off from the setting -up of own. Daventry proved to be quality land -line from the The tree of memory stands 5XX that had a most beneficial much more than an capital enabled it to radiate the like a sentry.... effect on the British radio alternative programme, it highly esteemed London Over the graves on the industry. Britain was being became the saviour of the programmes from a massive silent hill." flooded by excellent radios British radio industry. antenna that was held aloft by With the opening of Daventry, from the USA, whose radio The new station also two steel masts 150m high and the BBC now provided at least industry was more advanced provided the first controversy 245m apart. It was the most one programme to 85% of the than ours. But the American over BBC pronunciation. Local powerful broadcasting station population, even if they sets were not built for long people, for historical reasons, in the world, as well as the first owned only crystal sets. And wave reception, and so could had always pronounced the on long wave. Since all those who aspired to one - not bring in Daventry. All the name of the district as 'Dane - transmissions bore callsigns, valve sets could receive the new British sets were provided tree', but the BBC insisted Daventry was allotted the upon pronouncing it as it was combination 5XX - the double Abbreviations spelt. But to all listeners, X referring to its special and however, they pronounced it, experimental nature. BBC British Broadcasting Company Daventry was the greatest Although Daventry actually (later Corporation) event that had occurred since started broadcasting on July kHz kilohertz the formation of the BBC. 21, it was officially opened six km kilometres Nothing equalled it until the days later on July 27, by Sir m metres mass arrival of television. William Mitchell -Thomson, the

Your Comments___

Dear Sir September Short Wave Magazine has been brought to my valve is adequately described in Wireless World for 20 April notice, and I read with great interest the article on the EF50. 1939, but it never really caught on. The EF50 managed an There are some comments I would like to make. The valve adequate mutual conductance without recourse to was developed in Holland before the war, see Wireless World secondary emission. for 16 February 1939, and incorporated in the Pye 45MHz Incidentally, the ratio of mutual conductance to input straight television receiver. This was much used in airborne capacity is generally regarded as the criterion of goodness radar as an i.f. amplifier. Reference to the Wireless World for r.f. amplification, noise factor also being important and article will show that the valve originally had no screening the RL7 (VR136) was the European leader at the time. can and had locking pins. However, the RL7 was not suitable for pulse circuits, and Your photograph shows the production versions. Mullard cost more, therefore it was used for head amplifiers only. denied that there ever was a different prototype, which was The EF50 was the op -amp of that era, as I explained in an rather unfortunate since I have one, marked with a proviso article on the Anode Follower in SWM some time in the late that it is a prototype and production could not be forties, when Austin Forsyth was the editor. guaranteed. R.Brett -Knowles G3AAT I also have a prototype EE50, of similar appearance. This Havant

Short Wave Magazine, November1991 11 Feature Educational Software for Basic Electronics- Part 9

J.T. Beaumont G3NGD continues this series with some programs to teach students about mathematical formulae.

Transposition of The program prints the Formulae question on the screen in a Simultaneous Equations. similar manner to that This program is a 'self - shown in the last program learning tutor'. When (P22). Use has been made program is RUN, the 7x + 4y = 41 of 'User Defined Graphics' student may choose any of 4x - 2y = 2 so enabling the formula to the following options be printed on the screen which are listed in a menu. (S.23). x=3 At line 330, the print 1. Transpose symbols format of the computer (0 connected by a Plus or y=5 has been set so as to give Minus. the answers to two decimal places. 2. Transpose symbols Press the space -bar to continue In this program use has connected by a Product. been made of 'Functions'. Functions are similar to 3. Transpose symbols 'procedures' but always S22 is shown above with S23 below. connected by a Quotient. give a calculated result; in this case FNPOS(X) and 4 Perform Cross - Quadratic Equations. FNNEG (X) performs the multiplication. calculation when the axe+bx+c=0 equation is positive or 5. Transpose symbols negative respectively. connected with Brackets. The Formula is: 350 PRINT x = FNPOS 6. Transpose symbols (the calculation is connected with b2 - 4ac performed below) Reciprocals. -b± 430 DEF FNPOS(X) 2a 440 X=(-B+SQR((B 2) - 7. EXIT from the 3x2 + 8x + 2 = 0 (4*A*C))) I (2*A) program. 450 = X x = 2.39 or 0.28 After a demonstration of Press the space -bar to continue When solving the techniques involved, engineering problems, it is the student is given the possible to have roots with opportunity to transpose negative numbers It is not the formulae on a line -by- procedure DEFPROC- case. (Q and R are only possible to find the value line basis. The same Setup. Here, use is made used in printing the of the square root of a question can be repeated if of the function 'ABS', question). After entering negative number, and necessary. which means absolute the numbers, which can be when this is encountered value. (This turns a either positive or negative, the negative numbers are Simultaneous Equations negative number into an you should press the represented by the symbol equivalent positive RETURN key. j. (Pure maths books tend This program helps number). to use the symbol i, but in teachers and students to In lines 480 to 490 the Quadratic Equations engineering books j is check their answers when values of (Y) and (B) are used because symbol i performing calculations represented by (Q) and (R) This program helps represents the value of the involving simultaneous respectively, and are both teachers and students to instantaneous value of equations. positive. Variable A$ and check their answers to current). If, for example, From the screen lay -out B$ are used to insert a plus calculations involving the answer to a problem (S.22), it can be seen that or minus sign if that is the quadratic equations. was x=2.00 + j3.00, then the number 2.00 is called the actual question The complete suite of programs is available on a 51/4in the real part and j3.00 is appears on the screen at 40 or 80 track floppy disk direct from Short Wave the same time as the the imaginary part. The Magazine. The software is only available for the BBC expression x + jy is called a answer. This is Computer, price £8.95 post free. programmed using the complex number. 12 Short Wave Magazine, November1991 MARTIN LYNCH G4HKS THE AMATEUR RADIO EXCHANGE CENTRE 286 Northfield Avenue, Ealing. London W5 4UB.Tel: 081 566 1 120Fax: 081 566 1207

RATHER THAN BLOWING MY OWN STANDARD. TRUMPET, I THOUGHT THE CUSTOMERS SHOULD HAVE A SAY... YAESU o Thornf íeld Mount Carmelroad .P1 ICOM Palestine Oct hr Gratele Sell 7ES h Hants É+16.vorctn . KENWOOD 1991 YSnp°n8, 3rd September .. AL/NCO phoned the Dear Martin bought aTS120V, having y called in and AMSTRAD I for 24 hours. Last Saturday 'reserve' it know how previous day to eight like to my p ir . Authorised Dealer thought you lie. first visit. I attention you gave rha'o, Since it wasay courtesy andatt t.aerOp ha^Je was with the hay°N ne k, I (the coffee vac pleased of course, mLh4alase rll'2 three of you r enp ayOa t avcc whor 'you",I mean all velcomel).youfelt [callthat r°r particularly I rea 1 er alY out the rig 1 was quickly P apspent checking buying. and key, as so' aaOar I with it before Flea Out d9 the happy dummy load tt.aa 7 was connection, e o, Op cared that supply, aerial rOar_ with a paves in the e I asked forthem. o[ he test-bench I availabilityailitnut the rig. beingappreciatedthewhile nt I particularlyleft alone tremely shop andd being professional and friendly, lallxcectaínly buy your teas sales pressure. I a absence of In shoct witha helpful, from Youagain) .Y

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..ress and callsign . . . so don't be ion from VXS ....(I Martin Lynch is a Licensed Credit Broker. Full written details upon request. Typical APR 36.8% PHONE 081-566 1120 in WHETHER YOU WISH TO BUY OR SELL, NEW OR USED, RING ME TODAY. I GUARANTEE YOU WON'T BE

DISAPPOINTED. VISITING THE SHOP OR MAIL ORDER, For fast mail order Tel: 081-566 1120. Please add £10.50 for 48 hour delivery. YOUR BUYING EXPERIENCE WILL BE TOTAL PEACE OF SHOP OPENING HOURS: MIND - OR YOUR MONEY BACK, GIVE ME A TRY - Tuesday - Saturday 10 - 6pm. 24 hour Sales HOT LINE 0860 339 339 (after hours I WON'T LET YOU DOWN. only). FAX order line open 24 hours 73 MARTIN G4HKS

Short Wave Magazine, November 1991 13 Project Improving Short Wave Broadcast Reception

If you have two antennas for the reception of an a.m. short wave broadcast signals, you may have noticed that the fading and distortion occur on each antenna at different times. It follows that combining the two signals should improve the quality of reception. R. A. W. Hill GMOIJF describes a simple and easily constructed circuit for doing just that.

The idea of using several passes the tuned circuit, former, with plenty of taps, logarithmic potentiometers antennas simultaneously to should no phase shift be selected by S3 and S4, is allows smooth adjustment of combat fading dates back to required. To use the phase satisfactory. This allows the two signal levels. the early days of radio. shift, the capacitor is first coverage of a range of The connection to the Because the antennas were tuned to resonance (fr) by frequencies, while keeping the receiver should be by the sometimes miles apart and the getting a signal minimum. capacitance within the range shortest possible length of low relative phases of the signals Tuning to either side of mentioned. capacitance . If indeterminate, signals were resonance (fr), to about 0.9fr During adjustment of the available, a good direct earth received and detected or 1.1fr, then gives an circuit, the switches S1 and S2 should be connected to the separately, often with a appreciable phase shift (with need to be quickly and easily unit, not the receiver. common a.g.c. system, before some attenuation) of perhaps operated. A crocodile clip on being combined. In the system ±750, depending on which way the antenna wire, to be clipped Adjustment of the outlined here the signals are, the capacitor is turned. onto a piece of stiff wire Circuit in fact, combined directly, with The circuit Q should be protruding from the unit, is suitable phasing, before being high, which means that the very convenient for this Adjustment for a chosen passed to the receiver. An capacitance should not be too purpose. station can be done in several important aspect of the design large: 100-200pF seems to The 20052 resistors are for ways, according to is that the antennas are work well. Also, the Q of the isolating the antennas from preferences and previous isolated from one another coil itself should be high and one another, as already experience, but the aim must electrically by a resistance 22s.w.g. wire on a 25mm mentioned. The use of always be to get the two network that also allows adjustment of the relative levels of the two signals. This is important, since, if the two antennas were simply connected together so that current could flow freely from Antenna one to the other, we would 2 have a third antenna, with its own fading and distortion pattern, probably no better than those of the two separately. To RX For many purposes the loss (high impedance) of signal in the level and 1 phasing networks is not significant, but in this connection it can be mentioned that the circuit is best suited to listening to rather strong signals for considerable periods of time, since 'selective fading'. which is so fatiguing to the ear, is C2 300p noticeably reduced. Practical Circuit

The circuit shown in Fig. 1is for two 'random wire' antennas. It has facilities for adjusting the level and phase of both signals, as well as a Fig. 1. switch position which by - 14 Short Wave Magazine, November 1991 Project

YOU WILL NEED Resistors 0.25W Carbon 5% 20052 2 R3,4

Potentiometers 1 k12 log 2 R1,2 Capacitors Variable 0-300pF 2 C1,2 Switches Rotary 1 p6w 2 S3,4 signals at the receiver at the here one antenna was a wire same level, and fairly closely Miscellaneous running as directly as in -phase. A rather rough 22s.w.g. enam. copper possible, vertically, to the adjustment may result in an wire; 25mm dia. highest point of the house, the audible improvement, but it is other a rectangle of 100m of a good idea to aim for a former; Plastics box. Knobs (6). wire, at a height of about 5m, situation where disconnecting both ends of which are either antenna shows a available at the receiver. noticeable decrease in signal the controls, and then shifting differently located, or Either end, or the two of a few dB, as indicated on the phase and level controls because they respond connected together, could be the S -meter. If connecting a accordingly, can be a useful differently to the plane of used, giving useful flexibility second antenna results in a approach to getting good polarisation of the incoming when adjusting phase. decrease in signal, the two results. wave. Polarisation effects of components must be out of considerable importance phase, and if this decrease is Suitable Antennas have been reported by B. large, the phase difference Sykes G2HCG (Practical must be approaching 180°. In Fading patterns of antennas Wireless, November 1989, this case noting the settings of may differ because they are p26). In the tests reported

Results

The prototype unit, built in a plastics box, works satisfactorily between 4 and 15MHz. At higher frequencies some screening may be necessary. The Lowe HF-125, was used, usually in the synchronous a.m. mode. With this refinement, some remarkably good programme quality has been achieved. Stations investigated include All India Radio on 11.620MHz and Deutsche Welle on 6.075 and 9.545MHz. Phase and level settings for Deutsche Welle have been shown to remain remarkably constant from day to day. The success of these test depends on subjective aural judgement and I am indebted to Mr Graham Perry GMOEFC and to Dr Wolfgang Korner, both experienced listeners, for their assistance in assessing the circuit performance.

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Short Wave Magazine, November 1991 5 Feature Tuning in to the Secret Broadcasters-2 In this concluding part, Gerry L Dexter surveys the current clandestine scene with frequencies and times of known transmissions.

To get you started, here is a 15.100MHz at 1200-1255; 0500; 15.480MHz at 2330-0030. 11.930MHz at 1400-2300. survey of what's out there, 15.685MHz at 0130-0215, 1200- Address: Same as Voice of the Address: Radio Marti, 400 - 6th presented alphabetically, by 1255 and 1515-1615; National Army of Democratic St. SW, Washington, DC target country. Remember that 17.540MHz at 0130-0215 and Kampuchea. 20547, USA. new stations are always 1515-1615. Address: Postfach Cambodia - Voice of the Cuba: La Voz del CID (Cuba coming on the air and current 2605, D-2000 Hamburg 60, Khmer (Khmer People's Independiente y Democratica). stations departing. Times and Germany. National Liberation Front and 6.035MHz at 0210-0930; frequencies fluctuate and Angola - A Voz da Resist- National Union Front for an 7.340MHz at 2300-1100; transmissions may not occur encia de Galo Negro (Voice of Independent, Neutral, Pacific 9.941MHz at 0930-0210; on a daily basis or may be the Resistance of the Black and Co-operative Cambodia). 11.635MHz at 1100-2300. altered at weekends. Ad- Cockrell (UNITA). 7.100MHz at 6.325MHz at 2300-0000, 0430- Address: 10000 SW 37th dresses of stations or the 1800-2300; 9.700MHz at 0500- 0700 and 1100-1400. Address: Terrace, Miami, FL 33165, groups operating them are 0830; 11.830 at 1100-1400; PO Box 22-25, Ramindra Post USA. included where known. 15.500MHz occasional tests Office, Bangkok 10220, Cuba: Radio Caiman. Languages used have not around 2100. Address: c/o Free Thailand. 9.965MHz at 1200-1530 and been specified but may be Angola Information Service, China - Voice of June 4th 2300-0400. assumed to be in the 1850 'K' St. NW, Suite 350, (Independent Federation of Cuba - La Voz de Alpha 66 language(s) or vernaculars of Washington, DC 20006-2202, Chinese Students in the USA) (Alpha 66) via WHRI, Indiana. the targeted country, e.g. most USA. via Broadcasting Corporation 7.415 and 9.495MHz at 2300- anti -Iranian clandestines Cambodia - Voice of the of China, Taiwan. 7.150MHz at 0000; 9.495 and 11.790MHz at broadcast in Farsi. Times are National Army of Democratic 0615-0800, 1030-1200, 1530- 1100-1200. Address: PO Box given in UTC. Kampuchea. 5.407MHz at 1830 and 2215-0020; 7.250MHz 420067, Miami, FL 33142, USA. Afghanistan - Afghanistan 0800-0900,1000-1500 and at 0230-0340, 0615-0800, 1030- Cuba - La Voz de Mojahedin Radio. 6.140MHz at 2315-0200. Address: First 1200, 1530-1830 and 2215- Fundacion (Cuban -American 0200-0330 and 1230-1400. Secretary, Permanent Mission 0020; 11.905MHz at 0615-0800, National Foundation) via Afghanistan - Radio Free of Democratic Kampuchea to 0915-0945, 1030-1200, 1530- WHRI, Indiana. 7.415 and Afghanistan, via RFE/RL. 7.255 the UN, 747 Third Avenue, 8th 1830 and 2215-0020; 9.495MHz at 0100-0200; 9.465 and 9.555MHz, 0230-0300; Floor, New York, NY 10017, 15.280MHz at 2100-2200. and 11.790MHz at 1300-1400. 9.540 and 11.770MHz, 0230- USA. Believed located in Address: PO Box 15-7939, Address: Cuban American 0330; 17.895, 21.510 and China. , IL 10017, USA. National Foundation, PO Box 21.530MHz at 1330-1430. Cambodia - Voice of Colombia - El Pueblo 440069, Miami, FL 33144, USA. Address: RFE/RL, 1775 Democratic Kampuchea Responde. 6.315MHz at 0030- El Salvador - Radio Broadway, New York, NY (Khmer Rouge). 6.025MHz at 0115. Venceremos (Farabundo Marti 10019, USA. 1300-1400; 7.350MHz at 2330- Cuba - Radio Marti. National Liberation Front) Afghanistan - Voice of 0030; 9.440MHz at 1300-1400 6.030MHz at 0200-0930; 6.700MHz range at 1200-1330, Unity (Muslim Mojahedin of and 2330-0030; 11.780 and 6.070MHz at 0930-1200; 2300-0330. Address: Cuscatlan Afghanistan): 12.230 at 0130- 11.870MHz at 0900-1100; 9.525MHz at 2300-0600; Communications, 95 Horatio 0215, 122-1255 and 1515-1615; 15.110 and 17.680MHz at 0400- 9.590MHz at 1200-1400 and Street, Room 509, New York,

C IRAN AMERICAN NATIONAL FMAD4TKNV

An announcer at one of the first anti -Afghanistan stations to go on the air after the USSR invasion. Radio Free Kabul operated only on f.m.

Former US President Ronald Reagan is welcomed to a convention of the Cuban American National Foundation, which airs La Voz de Fundacion over WHRI short wave from Indiana. 16 Short Wave Magazine, November 1991 Feature We want PEACE

NY 10012, USA. 4.457 and 6.960MHz at 1000- El Salvador - Radio 1700 and 2000-0100. Venceremos (FMLN, as Korea - Radio Echo of previous). 3.500 and 6.300MHz Hope. 3.985MHz at 0900-1200 range at 0015-0115, 0200-0315, and 1400-1700; 6.348MHz at 1215-1315 and 1830-1915. 0200-0500. Address: As Previous. Note: Laos - Radio of the The current status of these Government for the Liceration two stations is uncertain - of the Lao Nation. 10.200MHz there have been no reports of at 0100-0300 and 0700-0900. reception recently. Libya - Voice of the Libyan Estonian SSR - Radio People (National Front for the Hope, aka Radio Nadezhada Salvation of Libya). 9.450MHz (believed operated by Soviet at 1900-2100; 11.825MHz at Armed Forces). 12.055MHz at 0400-0600 and 1600-1800. 0430-0600, 1030-1200 and Address: Al-Inqad, 323 S. 1630-1800. Franklin, Box A-246, Chicago, Ethiopia - Voice of the IL 60606-7093, USA. Broad Masses of Eritrea Libya - Voice of the People (Eritrean People's Liberation aka Voice of the Libyan Front). 3.712, 3.940, 7.020, People's National Movement 7.485 and 10.020MHz at 0400- (Libyan People's National 0700, 0900-1100 and 1400- Movement). 9.450MHz at 2200- 1700; 6.944, 7.010, 7.830, 0000; 11.825MHz at 1800-2000. 7.890, 9.311, 9.343 and Morocco - La Voz de 14.305MHz at 0400-0445 and Sahara Libre (Polisario Front) 1945-2030. Address: National TheNon -Communist Resistance operates Voice of the Khmer. via Radio Algiers. 9.640 and Guidance Department, Sahel 15.215MHz at 2200-2300. Eritrea, PO Box 671, Port Ethiopia - Voice of the 1530 and 1730-1830. Address: BP 10, El Mouradin, Sudan, Sudan. Broad Oromo Masses. 7.886 Iran - Voice of the Struggle Algiers, Algeria. Ethiopia - Voice of Eritrean and 9.320MHz at 0400-0430 of Iranian Kurdistan. 4.185 and Myanmar - (Burma) Voice Liberation. 5.038 and and 1500-1530MHz. 5.0800MHz at 0330-0430, 0800- of the People of Wa State. 6.150MHz at 1500-1600. Ethiopia - Voice of Oromo 0950 and 1530-1620. 5.110MHz at 1130-1330. Ethiopia - Voice of the Liberation (Oromo Liberation Iran - Radio Iran Toilers Myanmar - Voice of DAB Tigre Revolution (Tigre Front). 9.540MHz at 1500-1545 (Iranian Tudeh Party). 4.775, (Democratic Alliance of People's Liberation Front). and 1900-1945. 6.2300 and 10.870MHz at 0230- Burma). 7.137MHz at 0130- 6.944MHz at 1500-1630; Iran - Voice of the Commu- 0330 and 1530-1830. Address: 0330. 7.010MHz at 1900-2030; 7.830 nist Party of Iran. 3.888MHz at PO Box 49034, S-10028, Palestine - Al Quds Radio and 9.311MHz at 0400-0500, 0315-0445, 0430-0600 (Friday) Stockholm, Sweden. (Popular Front for the Libera- 1500-1630 and 1900-2030; and 1700-1900; 6.410MHz at Iran - Iran's Flag of tion of Palestine -General 7.886 and 9.335MHz at 0530- 0315-0445 and 1700-1900. Freedom Radio (Front for the Command). 5.990 and 0615 and 1530-1615. Address: OIS, Box 50040, 5- Liberation of Iran). 9.045 and 15.050MHz at 0600-1100 and Ethiopia - Voice of 10405 Stockholm, Sweden. 11.620MHz at 0330-0530; 1300-1700. Address: PO Box Ethiopia on the Path to Iran - Voice of the Iranian 15.100MHz at 0645-0730, 1400- 2574, al-Ghubayri, Beirut, Democracy (Ethiopian Revolution (Iranian Commu- 1445 and 1630-1825; Lebanon. People's Revolutionary Party). nist Party). 3.888, 4.475, 6.415 15.565MHz at 0330-0530 and Palestine - Voice of 7.01 MHz at 0330-0400 and and 7.0800MHz at 1430-1530. 1630-1825. Address: Postboks Palestine (Palestine Liberation 1430-1500; 9.400MHz at 1430- Address: As Voice of Commu- 103, DK-2670, Greve Strand, Organisation) via Radio 1500. Address: PO Box 710358, nist Party shown previously. Denmark. Algiers. 11.715 and 17.745MHz Dallas, TX 75371, USA. Iran - Voice of the Feda'i Iran - Voice of the Iraqi at 1700-1800. Address: PO Box Ethiopia - Voice of the (Iranian People's Feda'i People. 7.000MHz at 1400- 411, Luanda, Angola. Ethiopian People for Peace, Guerrillas). 4.107MHz at 1700- 1445. Somalia - Radio SM Democracy and Freedom 1800; 4.160MHz at 0200-0300 Iraq - Voice of Free Iraq (Somali National Movement). (Ethiopian People's Revolu- and 1600-1700; 6.645 at 0300- (Coalition -run). 9.570, 9.995, 6.305MHz at 1500-1700. tionary Democratic Front and 0445. Address: ACA, BP 43, F- 15.600 and 17.960MHz at 1300- Sri Lanka - Voice of Eelam Ethiopian People's Democratic 94120 Fontenay-sous-Bois, 0100. (Eelan People's Liberation Movement). 7.880 and France. Korea - Voice of National Front). 7.010MHz at 0230-0330 9.335MHz at 0430-0530 Iran - Voice of the Worker Salvation (Front for Saving the and 1300-1330. (Sunday to 0500); 7.905 and (Iranian Revolutionary Nation). 3.480MHz at 0200- Sudan - Radio SPLA 9.320MHz at 1900-2000 Worker's Organisation). 0700, 1000-1700 and 2000- (Sudan People's Liberation (Sunday to 1930). 4.16MHz at 0300-0530, 1430- 0100; 4.120MHz at 1000-1700; Movement). 9.550 and Short Wave Magazine, November 1991 17 Feature

1.110MHz at 1100-1200 and International. 7 IRCs from 1300-1400. DSCWI, Tavlegar 31, DK-2670, Yugoslavia - Radio Greve Strand, Denmark. Libertas (Croatian Committee Clandestine Calling, for Human Rights). 9.465 and published by Shortwave Press 21.840MHz at 1600-1700. Service, Weender Str 3, D- Address: 1174 Clarkson Road 3400 Gottingen, Germany. North, Mississauga, Ontario The Polisario Front runs a radio station Monthly. 24DM, $US17/year. L5J 2W2, Canada. and produces a monthly publication. Clandestine Confidential And that's the lot. Cur- Material from Unita's US PR agency. Newsletter, RR4 Box 110, Lake rently, anyway. Remember Junet9á6 Geneva, WI 53147, USA. that all schedules and frequen- Issued every other month. cies can be highly variable. It's $US13/year. safe to say that no-one has NEWS ANO INFORMATION FROM UNITA The A *C*E (Association of ever heard all the clandestine UNITA'S FIGHT FOR FREEDOM Clandestine Enthusiasts). stations in operation at any Evolution of the Political and Military Situation In Angola. 1960-86 Monthly bulletin that also given time but, with concen- includes , num- trated and persistent listening bers, etc. $US25/year from PO the average DXer should be Box 11201, Shawnee Mission, able to log many of the KS 66207-0201, USA. stations on this list. Good Clandestine Communique Hunting! ,MU monthly column in Popular Communications magazine, Clandestine Information 76 North Broadway, Hicksville, Sources NY 11801. Subscription $US24/year (surface mail).

There are several continuing IMO Media Network, the Radio sources of news about t Netherlands DX programme is clandestine stations. Here are also recommended for some suggestions. VI -11 excellent coverage of breaking Clandestine Stations List, F. M1W aNafu lemi.temeillhe ,C Come clandestine broadcasting published periodically by the news. ,M. Danish Shortwave Clubs l...... _. SHORT WAVE MAGAZINE PCB SERVICE

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Short Wave Magazine, November 1991 19 VADO .1VERYTNINCI

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410 KENPRO KT220 Complete 2mtrhandheld with extendable receivecoverage.. Full keypad frequency entry Built in clock andtimer facility A new pocket shortwave radio covering:- 2.5W 0.5W output 150kHz-30MHz AM/SSb 76kHz - 108MHz FM £149 Single strengthmeter Scan 10 memory ICF SWIE Pocket SW plus VHF radio £149 channels Complete with charger.ni-cad. AIR 7 Very sensitive airband H/held radio £229 ear piece.belt clip and PRO 80 ShortwaveNHF H/held radio £299 strap. AN 1 An external active antenna with built-in pre -amp covers. (150kHz-30MHz) £49.95 £238 * Call John Gordon our Sony specialist for more details of these or any other models of interest.

Bearcat DX 1000 TIM D ital Short Wave Receiver O m 10 kHz - 30 MHz We are one of the leading ICOM stocidsts carrying the all mode 12 volt INGhave a large full range of Receivers and Antenna Radio equipment. receiver supplied selection of used constantly changing whichlltois For help or Information call Paul Morton our ICOM with mains adaptor. check availability Here is a selection before ordering butcall Specialist Nowt £325 Sony 2001 portable receiver...avg.cond Lowe SRX30 ...... 190.00 gen coy. receiver IC R7100 ....avg.cond. Kenwood TS930S ..... 165.00 Covers 25-2000 MHzwith all fitted ATUv.g.c.. KDK 2Mtr FM mode capability. Includes 900 Steeplestone Specialist Radios mobile Ideal 10º 00 starter rig.. memory channels with 5 Sony Air7 Portable 175.00 airband and VHF Yaesu FT2700 ._ different scan functions. MBR7 Multi Band T Dual band Mobile... 145.005.00 Kenpro FM240 boxedv gc Automatic record function. £ CALL `Jumbo' Radio 2Mtr mobile, boxed.. 38 Sony PRO80 H/held Covers MW, LW, SW 5.00 shortwave andvhf receiver IC R72 (2.3 - 22 MHz) Sony SWI E Pocket 225.00 receiver, withacces ...... 99.00 Covers kHz -30 MHz all FM (88 -108MHz) Heathkit 101 HFrig with all modes (FM Optional. manuals....g/cond Airband (108 -136 MHz) SX200 16th.base scanner .... 250.00 99 memory channels artl/fm switchable Marine Band (136 -176 MHz) Yaesu FTIOIZDFM ..... 125.00 and 10 dB pre - amp imac.cond. Mains or Battery Operation. Yaesu FR5OB with am/fm fitted500.00 fitted as standard. Ham bandsonly receiver..v.g.c AOR 950 Desktop .... £59.95 scanner boxed 99.00 £663 - as brand new 175.00 'Realistic PRO3010th. h/held MBRIO Multi Band Radio/Cassette Yaesu FT27OH 2Mtr scanner ..100.00 IC R 7000 45w mobile FM Covers same range as MBR7 above plus built in - CT1600 C/With 13S25 ...... 195.00 Icons most popular communications receiver covers 25MHz Docking booster clock 8 cassette. 150.00 to 2 GHz with 99 memories and all mode reception..£ CALL £69.95 5AB REP 1C RI Aircraft Radio Pack Pocket size Wideband handheld scanner covers 150 kHz to This specialist "Aircraft Enthusiasts: pack 1300 MHz with 100 memories.NEW LOW PRICE...£ 359 contains SAB9 AirBand Radio. Set of headphones. ,5.1.r, Send £2 for our P IC -R1 Scanning Rx (New Low Price) £365 ALL FOR JUST £19.95 Latest Bumper IC -W2 New Dual Bander Nicadrehrgr £395 IC-2SRE New 2m WHeld + wideband Rx £425 Books ,'. Catalogue of IC-4SRE New 70cm H/held + wideband Rx £445 Air Tratic Ratio (1991 Edion) £3 95 7 IC-4SE 70 ems FM FVHeld .. £295 VHF/UHF Frequency Guide ...... _...... __ £5.95 Amateur,CB IC-4SE/T 70 arts Keypad DTMF £299 Flight Routings Guide 1991 £4.95 Scanners 11 (P. Rouse) IC-2SE 2 mV H/held Nicad/chrgr £275 £7.95 Scanners 3rd Edition £8.95 and Scanning IC-2SE/T 2 mtr H/held Keypad DTMF £295 Marine Frequency Guide £4 95 IC-24E/T Dual Band H/Held £385 Equipment

FAST MAIL ORDER All orders received before 4pm HOTLINE0705 662145 despatched same day. vi iiiiUSE YOUR CREDIT A CARD for same day despatchsoi The ultimate base-mobile scanning receivers from AOR AR3000 widest range monitor... The AR3000 now extends your listening horizons further than anyone believed was possible. Covering the entire frequency spectrum from 100 kHz to 2036 MHz without any gaps in the range, the AR3000 brings the general coverage receiver to a new level of performance and versatility. Not only will the AR3000 cover this extremely wide range, it will allow listening on any mode: USB, LSB, CW, AM, FM (narrow) FM (wide). Tuning rates are selectable from an ~io ".re ' ultra -fine 50 Hz step for SSB and CW, right ( up to 100 kHz steps for the TV bands and E:eaross., Band -2. A slight pull on the spring -loaded rotary tuning control will increase the tuning speed by a factor of ten for really fast tuning. 400 memory channels are provided arranged in 4 banks x 100 channels. Each memory channel will retain mode, frequency and RF attenuator setting. 15 band pass filters are used before the GaAsFet RF amplifiers, this ensures high sensitivity throughout the entire range with outstanding dynamic range and freedom from interrnodulation effects. An RS232 port is provided to enable remote operation by plugging directly into most personal computers. The AR3000 is supplied with a telescopic whip aerial, 13.8V DC lead, AC power supply and operating manual. ACEPAC3 PC control for theAR3000... This exclusively developed multi -function IBM-PC based program further increases the versatility of the AR3000. A sweep facility provides a spectrum analysis graph. The very latest version displays frequencies in X axis and squelch opening percentage on each frequency in the programmed frequency search range. This indicates 'how active' the frequencies are in the programmed search range. In addition to the graphic display, ACEPAC3 can produce a detailed numerical list from the graphic information. One memory file has 400 channels divided into 4 banks of 100channels. More than one memory file can be created to increase the memory storage capability. If you make just one extra memory file you can store 800 memory channels! AR2002 LAST PRODUCTION SPECIAL OFFER £399 INCLUDING VAT carriage by post £5.00 extra An end of production stock clearance provides the opportunity for you to acquire the high performance AR2002 wide coverage receiver at an attractive price. The AR2002 is a superb choice for the first time purchaser, combining performance with ease of operation. The business user or enthusiastic listener will appreciate the excellent strong signal handling characteristics (very important in urban areas or hill -top locations), high sensitivity and good selectivity. The AR2002 is a versatile unit covering a range of applications including airband, marine, amateur band, professional monitoring etc.If you already have a receiver, perhaps now is the time to consider buying your standby or second set. Two frequency bands are employed 25 - 550 MHz and 800 - 1300 MHz. Reception modes are AM, FM (narrow) and FM (wide). Typical measured sensitivity (FM narrow), is better than 0.35 uV and is largely maintained across the tuning range. Increments for tuning and searching are available in 5, 12.5 and 25 kHz. Control of the AR2002 is via a positive (non membrane) keypad. UP -DOWN frequency change is also available through a conventional rotary tuning control. External computer control is possible through the rear connector, the levels are not RS232 so a small interface is required (available from Garex Electronics). Twenty memory channels are provided, with easy keyboard entry and recall. Each memory channel stores frequency and mode information without restrictions. The memories can be recalled manually or scanned in sequence for easy and enjoyable listening. A programmable search facility is provided. The complete frequency coverage of the receiver can be scanned in 5 kHz, 12.5 kHz or 25 kHz steps. If desired two limits, one high and one low can be programmed by the user and searching is possible upward or downward. The speed of scan and search is selectable in two speeds. A delay facility may be switched to cope with the slight delay encountered when listening to simplex communications. Memory one may be used as a priority ariaZZatir channel being monitored every two seconds. Front panel readout of information is by liquid crystal display (LCD) which provides frequency, increment, delay, channel lockout and even a real time clock. A bar graph signal indicator allows comparative measurements to be made, this also helps with direction finding. The AR2002 is powered from 12 - 14V DC. The set is supplied with a suitable mains adaptor, DC lead, telescopic aerial and operating manual. Please phone fbr a list 0/Participating dealers.

Also available: ÁR2000, AR2800, AR2500, AOR] AOR (UK) Ltd. DA3000 etc. Pera complete set of and Room 2, Adam Bede High Tech Centre, price list please send a S.S.A.E. (34p). Derby Road, Wirksworth, Derbys. DE4 4BG. Tel: 0629 - 825926 Fax: 0629 - 825927 F:&OE Project Switched Attenuators While re -reading Brian Oddy's 'Starting Out' article on antenna attenuators, Phil Townsend decided that the networks could be built onto a rotary switch without too much effort. So he set about building and trying out various switched attenuators.

Brian Oddy has mentioned attenuation. A check of the second switch in the SRX, as a have been looking out for any that he was not in favour of a network connections on the replacement for the RF GAIN effects of r.f. leakage from the potentiometer used as an switch for short circuits control. Switching -on the switches. Within my limited antenna attentuator, feeling revealed nothing, so, having receiver resulted in some knowledge and experience of that it could damp down any no other ideas as to the cause alarming noises from the radio, I am not aware of any. coil connected to it. As my of the irregularity, I was very loudspeaker, but they were Neither switch is positioned a.t.u. had a potentiometer firmly stuck. quickly found to be due to the close to other components, so attentuator, I was on the look- Fortunately, a day or two a.t.u. controls being perhaps there are none. With out for some effective means later,I picked up my incorrectly set. the RF Gain control removed of replacing it. November '89 copy of A second extended test, from the SRX, the stability of Whilst re -reading Brian's Practical Wireless and found with the first variable switch in the set came into question, but 'Starting Out' article in the the answer in S. the a.t.u. by-passed, left a a check through the receiver's July '89 SWM, I realised that Niewiadomski's article on feeling that attenuation values tuning range for any instability the three attenuator networks 'Passive Attentuator in between those selected, revealed none. he shows could be built on a Networks'. I had earthed the would be handy, so the a.t.u. two -pole, six -way rotary attenuator networks to the switched attentuator values Construction switch, as Cambridge Kits do a.t.u. aluminium box via a were changed to 5, 10 and with the component coils in solder -tag trapped under the 15dB. Installing the two A two -pole, six -way rotary their a.t.u. kit. switch. Earthing the networks, switches has provided a switch is required. I felt it wise Setting to work, I found as Niewiadomski advises, to couple of benefits - increased to use resistors of 5% or better making -up a switch with the the braid of the cable carrying performance from the a.t.u. tolerance for the networks. networks, plus a by-pass the signal to and from them, and an increase in sensitivity The switch has a stop -washer position, not difficult, although corrected the irregular of the SRX30. The previously and it's as well to check that some neat workmanship was behaviour. flat 'L' and 'Pi'circuits in the the washer is correctly placed required. An extended test with the a.t.u. can now be peaked on and then make a note of its Replacing the 1980 vintage Lowe SRX 30 the l.w. band (via an SEM l.w. position. The poles, lettered potentiometer in the a.t.u. with communications receiver, to 28MHz converter), while the on the switch body A & C, are the switch was no problem, so found Brian's set of Parallel and Series circuits for the input and output of the I began testing it for attenuation values to be not have sharper peaks. The device. To facilitate connecting effectiveness. Almost quite what I needed for the increased sensitivity of the up later on, a short piece of immediately a problem SRX, so a second switch was SRX is most noticeable on the insulated wire, about 50mm occured. The effectiveness of made up, still using Brian's 10 m.w. band. It is such that, for long, was soldered to each. the networks was irregular. and 20dB networks, but the first time, a m.w. loop For the straight -through Selecting the 10dB attenuator adding 5 and 40dB values antenna, with its directional connection tags 1 & 7 are provided a satisfying drop of from the 50Q section of Table properties, is needed to linked with a very short piece the "S" meter needle, but 2 in Niewiadomski's article. separate those stations on the of insulated wire, keeping the 15dB returned the needle It was with some band that share the same wire down on the switch body some of the way, while 20dB apprehension that the decision frequency. to save space. The series restored some of the lost was taken to install this Prompted by Brian Oddy, I resistor (R2) of the lowest

R2 Table 1

Attenuation R1 R2 R3 (dB) (12) (S2) (S2) Input R3 Output (50 ohms) (50 ohms) 5 180 33 180 10 100 68 100 15 68 140 68 20 62 240 62 40 47 2700 47

Fig.1: Basic Pi section attenuator. For Note: these values are only good for 5052 input and resistor values see Table 1. output impedances.

Short Wave Magazine, November1991 23 Project

Input

value attentuator was fitted in series. This check being next, using tags 2 & 8. After satisfactory, the long leads centralising the resistor's body were connected to form the between the tags, the leads loop. Last, but not least, the were soldered and any excess completed switch was closely cut off. The series resistors of inspected for short circuits. the other attenuator networks, Each switch needed a in ascending order, were minimum space of 40mm similarly fitted, care being diameter by 25mm high. taken avoid short circuits. Installation gave no problems, The resistors to chassis or but I did remove the locating earth (R1, R3) were dealt with pillar so that the switch could by gripping one lead close to be rotated to bring the the resistor's body with thin - earthing lead to the most nosed pliers and bending the convenient point for lead to form right-angle with a connecting to the signal cable not too sharp bend. I began braid. with one of these resistors forming part of the network Using the Attenuator with the highest attenuation Output value. The bent lead of the My use of the variable resistor was shortened so that, attenuator switch is governed Fig. 2: The resistor positioning and connections for after soldering to one or the by the SRX 'S' meter needle's the attenuator switch. other of the tags carrying the desire to spend most of its network's series resistor (R2), time in the region over S9. the earthy resistor's body With the a.t.u. and SRX Conclusions would be snug and at a switches in their by-pass tangent to, the switch's ring of positions, the wanted After many hours spent using the SRX 30 and solder -tags. Then working in frequency is tuned. Using the order and away from this receiver's switch, sufficient a.t.u. equipped with the attentuator switches, I resistor, the other earthy attenuation is introduced to have had to conclude that the attentuators resistors were similarly fitted, bring back the 'S' meter bearing in mind that the long needle to below S9. The make tuning the SRX too precise a business to lead of each resistor would be receiver and a.t.u. controls can put up with. Accordingly, the switches have soldered to the one preceding now be adjusted for best been removed and the original potentiometer it, (extending a lead if reception and then sufficient necessary), thereby forming a attenuation switched out to RF Gain control re -installed. One attentuator loop round the outside of the enable the signal strength to switch is now installed in my 'back-up' made-up switch. The long lead bury any receiver noise. of the earthy resistor first For an initial set of receiver, a valved Codar CR 70A, Mark 2: fitted, will be the one to be attenuator networks, I found where it has proved to be a satisfactory connected to the signal cable Brian's three choices excellent. addition. braid and so earth all the I would, however, suggest one attenuator networks. Before more of 5dB. To avoid having From my experience a set of attenuators forming the loop, I checked to make up the 14052 (R2) may or may not suit a particular receiver. each network with the resistor in the 15dB network, I multimeter to ascertain that its substituted one of 15052. After Therefore, before installing a switch, it should total resistance was in close some use it will become be temporarily connected to check that it will agreement with what it should apparent if other values would be of benefit. be, each set of resistors being, be more suitable for your until connected to the others, receiver.

Copies of Short Wave Magazine July '89 and Practical Wireless November '89 are available from the Editorial Offices price £1.85 each inc. P & P.

24 Short Wave Magazine, November1991 ICS The Shortwave Solution

The PK-232-MBX is a must for the shortwave listener. By far the most popularmulti -mode data controller ever, it can receive eight different types of data signals,including Morse Code, Baudot (RTTY), ASCII, TDM,(Time Division Multiplex), Weather Fax, Navtex,Packet and (new) Packet Lite. It also features the indispensable Signal Identification andAcquisition Mode (SIAM), which automatically identifies many types of digitalsignals. Comes complete with superb user friendly software for the IBM-PC. Software also availablefor most other kinds of personal computers. PK-232 MBX: £319.95. Post and packing: £6.00

ICS -FAX is simply the best way to demodulate multi -level grey scalefacsimile images received by your general coverage receiver. All necessary hardwareand software is included in the package, which also features: On screen tuning oscilloscope;Autolist feature for unat- tended image capture and save to disk. Up to 16 grey levels with 640 x480 resolution (VGA). Also supports EGA, CGA and Hercules formats. Prints to HPLaserjet or Epson compatible printers. Receives weather maps, press photographs (in colour) andradio amateur transmis- sions. Incredible image clarity and very easy to use. Interface connectsbetween the serial port of any IBM-PC compatible computer and the extension speaker socketof your SSB radio. ICS -FAX: £99.95. Post and packing: £3.00 Klingenfuss "Guide to Facsimile Stations": £17.95. Post and packing: £3.00 Prices include VAT at 17.5170 . Send for free Catalogue. Office hours, 09.00 to 12.30, 13.30 to 17.30.Callers by appointment.Available direct or from our dealers.

ICS Electronics Ltd. Unit V, Rudford Industrial Estate, Ford, Arundel, West Sussex BN18OBD. Telephone: 0903 731101 Facsimile: 0903 731105

Short Wave Magazine, November 1991 25 Southampton(0703) 255111Leeds(0532) 350606Chesterfield (0246)453340 Birmingham021-327 1497Axminster(0297) 34918

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26 Short Wave Magazine, November 1991 Feature

50 Countriesonthe 144MHz Band Part 5

Early radar experiments Difficult Target does not matter. A narrow nothing but admiration for showed that signals sent from crescent moon suspended in that dedicated small group of earth were being reflected Now, with a big antenna the sky does not mean that enthusiasts who have back to earth by the moon - system and high power, the only the part you can see is perfected their skills in albeit with an enormous loss problems do not decrease, the there - believe me, it's still achieving such outstanding in signal strength. Radio moon, seemingly big to young complete, just not illuminated. contacts. amateurs were, as usual, quick lovers and poets, is actually Remember also that the moon to exploit this new means of quite small, a mere 3476km in is visible during the daylight Delight v.h.f. propagation. As far back diameter and its average hours as well. In fact, some of as 1953, successful two-way distance takes up only 0.5° of the prime times for e.m.e. There we have it, five forms of contacts were made via the the celestial orb. It is now communication are in the propagation on 144MHz. moon on 144MHz. Since then, obvious that it is a difficult mornings when the moon is There are others, variations of this form of propagation has target to locate accurately 30° high in the western sky, these five, but a slight proved to be reliable on even without recourse to lunar orbit providing the correct angles understanding of the basic higher frequencies. data, and of course it is for signals sent from Europe to forms will,I am sure, allow Basically a signal from moving, orbiting around us reflect at a tangent to the the listener a surer chance of earth is deliberately squirted whilst we are orbiting the sun Americas. hearing long distance signals out into space, strikes the and also spinning on our own Although sideband can be on this band. Propagation on moon and is reflected at a axis. When the feeling of used, the major mode of the v.h.f. bands, although tangent to some other place passes be Most reasonably well understood, on earth. It sounds simple, but realised that the antenna must contacts are pre -arranged after still holds a deal of delight to I can assure you that it is not only need to be pointed at consultation of lunar charts or the keen listener. An extended anything but simple. The the moon, but will need to computer data, and a careful tropo duct opening may allow moon is close by solar have azimuth and elevation check at the low end of the you to hear 15 different standards, but still too far control in order to remain 144MHz band may give you countries within a few hours. away in everyday distances. It firing to the right direction, some indication that some one A big auroral event and you is an average of 384 000km and as the beam width of a is trying this system of may hear 20 different away and there is a vast loss high gain antenna is quite communication. You may find countries. Sporadic E will in wave energy over this distance to start with. Additionally, the moon is not a good reflector of radio signals Possibly the most esoteric form of v.h.f. propagation - most of the radio energy has been left to the last part of this series. P.E.W. reaching the moon is absorbed, leaving Allely GW3KJW lets us into the secrets of approximately 7% to be communications via the earth's original satellite, the reflected or deflected elsewhere. Then the moon. remaining energy has to travel the 384 000km back to earth. There is a loss of about narrow, this control must be very loud Morse signals spring surprises with signals 380dB on an earth -moon -earth accurate or the signal will miss around 144.010MHz either possibly from North Africa le.m.e.l path, so an the moon entirely. Due to the calling CQ or calling some coming in at loud signal inordinately large amount of spinning effects, the signal is exotic long distance amateur strength, or the band filled to e.r.p. has to be generated to better if the antenna is say in the United States. If you overflowing with Romanians overcome this loss. This circularly polarised, and the do not possess an antenna and Greeks. Occasionally entails the construction of reflected signal is in the system comparable with there is a mix of propagation high gain antennas, typically opposite polarisation - the Jodrell Bank, and a receiver modes when unaccountably in the order of 25dBd gain, problems mount. with a signal to noise ratio that 144MHz decides to throw even and high power. The DTI will, Earth -moon -earth only advertising blurb can bigger treats.I remember one on being satisfied that you are propagation is only possible equal, the chances of hearing day in June 1989 when there genuinely going to be when the moon is above the anything from the New World was a strong aurora in the attempting e.m.e. horizon, but when everything is remote, but not impossible. afternoon and early evening, experiments, issue a special is right, distances of more However, it is a form of followed incredibly by a licence authorising the use of than 15 000km can be communication worth Sporadic -E opening in the late high power, it is possible that achieved, not counting the monitoring, I once heard part evening and another time the normal legal limit of 400W path to the moon and back. of the callsign of a W5 for a during the Persieds meteor at the antenna may suffice if The fact that you may only see fraction of a second and have shower in August, when an the antenna gain is sufficient. part of the moon illuminated never forgotten it.I have extended tropo opening Short Wave Magazine, November 1991 27 Feature

meant that many contacts always work, you are listening would recommend that, no A 9 -element Yagi is not made with difficulty on meteor because you have correctly matter how good your very big at 144MHz and no scatter were repeated with forecast that such an opening receiver is, performance will more obtrusive than a Band II ease a few hours later. may occur. be vastly improved by f.m. antenna. It should be The discerning listener will installing an antenna as high capable of being rotated Other Disciplines obviously want to get the and as much in the clear as though 360°, and ideally most out of his receiver, so I possible. should be connected via good It will be seen that listening for quality low -loss connectors, the rare signals on v.h.f. is not and equally low -loss coaxial merely a matter of switching cable. If finances permit, the on and sitting back - the Abbreviations addition of a GaAsf.e.t. interesting study of astronomy masthead pre -amplifier will and meteorology becomes e.m.e earth -moon -earth make all the difference mandatory. MHz megahertz between hearing a faint signal One of the facets of our km kilometres and just hearing noise. hobby is that it leads to an dB decibels understanding of other dBd decibels referenced to a dipole disciplines, opening up new and fascinating lines of study. e.r.p. effective radiated power Finally, remember I have experienced many DTI Department of Trade & Industry that your antenna is years of happy listening on the W watts better horizontally v.h.f. bands, and many hours CQ general call polarised. I wish you of intense frustration having v.h.f. success in listening and completely failed to hear that f.m. frequency modulation you may hear those elusive country. Still they all fifty different countries come in time and, as I have on the 144MHz band.

tried to explain, luck does not

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28 Short Wave Magazine, November 1991 Audio Video Care - Receiving Weather ROBERTS SHORT WAVE RADIO Satellite Images? R808 With six systems to choose from, we havethe system Multi-bandFM/LW'MW'SW Digital to run on your Amiga, Archimedes, BBC or PC compat- pre-set stereo battery world radio. ible computer. Packed with features such as "Tri-colour display for frequency. \\N\\\\\\\\\\\vz; pre-set channel -time, signal and \\\NW.M.,CN battery strength PLUS lock sleep and stereo indication. The R808 has 5 tune -in methods. 45 pre-sets. dual time display. stand-by and clock alarm, giving tremendous performance and value.SW1.711- 29.999MHz (18 -pre). £112.00 LOWE AR2000 AMIGASAT 2.0The system for the Amiga computer. This system has many, many features to delight the Amiga owner, Hand Held Scanner 500kHz - 1300MHz AM & FM narrow. FM wide. too many to list but there is a demo disk available for just £5 1000 memories, 10 search banks. Supplied case, charger and aerial. inc. £259.00 DIGISATfor PC owners this package offers some superb features including unlimited , print -dump, 800 x SONY ICF SW7600 600 VGA images, auto -downloading of images, temperature readout, and lotsmore. High performance portable receiver with PLL synthesizer circuitry and continuous AM frequency coverage. GRAPHSTOREa 1/2 -Meg video framestore/graphics proc- LW/MW/FM/SW/SSB Reception - PLL Synthesized Circuitry - FM essor unit for use with the BBC/Master micros. With the Stereo - continuous AM Frequency Coverage - 4 Way Tuning - Sleep accompanying software package it enables BBC owners to Function - Digital Clock - Programmable Timer - 2 Step Tone Control enjoy the highest resolution images 1512 x 512 x 128 greyscales). Includes zoom, scroll, print -dump, and anima- - Antenna Input Socket - Headphone Socket -Key Protection - LCD tion. Display - Dual Conversion System - Supplied with Compact Antenna. Stereo Earphones and AC Power Adaptor - Power: 4xAA size Which ever software/interface option you choose, they are batteries, 6V DC. 240V AC with adaptor (supplied). all compatible with our standard range of receiving hard- ware - for full details, and prices write or call for our 1991 £ 150.00 catalogue. i! . v ,1.- MAILORDER communication systems 7 Langley Road (0727) 864162 MAIL ORDER martelec Watford, Herts. Prices include 110 London Road 8 Kimber's Lane, Farnham, Surrey GU9 9PT Phone VAT & P/P St Albans (0923) 245335 Herís AL 1 1NX Tel/Fax: (0252) 737620 DEWSBURY ELECTRO S DM-1000 READERRTTY/CWDECODER. 441-EASYall new EASY READERDM -1000' Introducing the simple to usedecoder everseen". In our opinion"the most RTTY BAUDOT45/50/75 BAUD CW SPEED2-99 WPM RTTY ASCII110and 200 BAUD MANUAL SPEED AUTOMATIC OR ;5.1 i1tMYJYS1lt. 1ant--,....; ta ltji Si+EttY -.:4,,,,A.1-..1'. SELECTION \ ;T Skt(-`-ri,+,...l.u. jrt

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Short Wave Magazine, November 1991 29 When it comes to deals Lo.k to Lowe

The R-2000 From Kenwood

The R-2000 fitted into the middle of the Kenwood The size of the speaker in the R-2000 is evident from the receiver range between the R-600 and the R-5000.Sadly thephotograph and Kenwood's involvement in the high quality R-600 is no longer with us - "Gone, gone and called mesound equipment field certainly shows in the audible results. Mother"; but the R-2000 goes on from strength to strengthThe audible quality from the R-2000 is very good indeed and because of its unique appeal to a wide-ranging section of theworthy of recording - for which purpose you have a tape listening fraternity. recorder jack and a built-in digital timer which not only The R-2000 is the receiver that bridges the difficult gapswitches on the R-2000 but will control the switching of the between the user who wants to listen to world-wide broadcastsexternal tape recorder. Just the thing if you want the latest from the comfort of his armchair and the keen listener whoAmerican football results but you also need to be in bed at the likes to hear aircraft on HF SSB across the Atlantic; or perhapssame time. CW from the other side of the world. The R-2000 can truly be The hobby of short wave listening really began in this said to satisfy the listening needs of almost everyone. country as, indeed, did broadcasting itself. As a result, the UK Kenwood have always excelled at making complexlistener has a long tradition of being able to get the best from equipment easy to use, so the control layout is logical and self-the "all pervading luminiferous ether" (to quote a 1920's explanatory. If you want to tune the receiver, turn the knob. Ifpublication). The R-2000 brings modern technology to those you want to tune slowly, press the button marked 'Slow'. If youskilled listeners and enables them to get the most from the want to get somewhere in a hurry, press the 'Fast' button. Dohobby. you want to change mode? Simply select, using the soft touch The best thing to do is to visit one of our Regional buttons. Recall something from memory? Touch the appropri-Centres and give this lovely receiver a good workout; but if ate button. Scan the memories? Press M.SCAN. And so it goesyou are unable to do that a detailed leaflet is available on on, displaying Kenwood's design skills which have come fromrequest. Better still, enclose four 1st class stamps for our listening to the users and giving you what you need. 'Listener's Guide' (see opposite page) and request full details The R-2000 covers 150kHz to 30MHz and receives SSB,on the R-2000. CW, AM and FM. There is also an optional internal VHF con- verter to extend the receiver's coverage to include 118MHz to R-2000 Receiver £599.00 (inc VAT) 174 MHz; again with all mode reception. This makes the R-2000 VC -10 VHF Converter £165.00 (inc VAT) an extremely comprehensive listening tool, particularly for the keen aircraft listener because you can follow aircraft progress on VHF during take -off and climb, and then continue to listen on HF SSB when the flight is handed on to Oceanic Control. I still get a kick from hearing 'Speedbird Concorde' SPECIAL OFFER FOR LIMITED PERIOD telling control that they are flying at some incredible altitude, at equally impressive speed and with an outside air tempera- R-2000 Receiver ...£549.00 (inc VAT) ture guaranteed to bring tears to the eyes of the proverbial brass plus a FREE magnetic long-wire balun (worth £36.00) monkey.

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LOWE ELECTRONICS LIMITED Chesterfield Road, Matlock, Derbyshire DE4 5LE Telephone: 0629 580800 Fax: 0629 580020 30 Short Wave Magazine, November 1991 When itcomes to deals Lóó1( to Lowe The "LEICESTER" Deals (until the end of November) Two record -breaking scanning receivers at the best no-nonsense prices around

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Short Wave Magazine, November 1991 31 Feature

Back in the mists of radio time - and that means approximately the first dozen 2L0 is calling again or so years of the present century - there existed in the British Isles a few Hundred Jack Hum G5UM traces the history of a famous callsign 'wireless enthusiasts' who talked among themselves BBC became a corporation five almost entirely by Morse code years later) and 'LO' came to with spark transmitters and be synonymous with London. four -figure wavelengths. Note It was one of many self- 'wireless' and 'wavelengths' - evident callsigns which the the words radio and licensing authority of the time frequencies were many years were in the habit of issuing into the future. They used (the licensing authority was three -letter callsigns, often the GPO, which then had a self -allocated. monopoly of electrical When peace broke out in communications within these 1918 and Amateur Wireless islands). A self-evident callsign Permits were available once was one which could be again, the transmitting related phonologically to its enthusiasts were faced with holder's name and 2L0 was some startling changes. For one of them. one thing, the callsign 'But wasn't 2L0 an amateur structure as they had known it callsign?' the reader may well Since the G2LO callsign appeared in the Callbook it has was no more: the new post- ask. Answer: it was at that been transferred to the BBC Engineering Transmission war callsigns were to consist time an amateur -sounding one Department at Warwick. There is a new QSL card to go of numeral plus two letters. but professionally used. The with the move showing the original '2L0' London For another thing, an esoteric GPO's habit in the 1920s was transmitter, operated by the BBC from 1922 to 1925. device called a thermionic to issue figure plus two letter valve had appeared - and callsigns to amateur and broadcasting. This had come famous store in Oxford Street. esoteric it remained for professional alike. A callsign about in the United States. It was good publicity for several years for the very list of the period shows 2L0 There virtually any Selfridge's, as it was one of good reason that most sandwiched between two undertaking prepared to the sights of London to a domestic receivers did not use wireless experimenters, 2LN in provide programmes over the 'wireless mad' public. it.It was too costly. In the hard Lancashire, and 2LP in south air could do so. At that time Its coverage was little more years post -WWI the London. there were already hundreds than the Greater London burgeoning horde of Precursor to 2L0 was of them in The States. metropolitan area. The broadcast listeners used another amateur -sounding Not so in Britain. One populace at large, enthused by crystal detector receivers. callsign, 2MT. It belonged to a organisation, the BBC (still a what it read in the Marconi experimental station company like the other newspapers, wanted a share Learning Thermionics at Writtle in Essex, and its callsign holders) was charged in 'this modern miracle'. To callsign could be transliterated with the duty to provide meet the demand the BBC set Thus the British 'wireless as Marconi Telegraph (MT). Its broadcast programmes for the in train an engineering project experimenter' found himself purpose was to give the populace. Not many hours a to provide what were to be obliged to become au faitwith burgeoning body of wireless week to start with, but called Main Stations in the this revolutionary technical enthusiasts something to gathering more air time as the kingdom's larger cities. Many development, the more listen to. Its characterful decade progressed. of these were once again particularly because in the prime -mover was Captain P.P. allocated self-evident Transmitting Permit issued to Eckersley, an entertainment in Flagship callsigns. Glasgow's 5SC him - still condescendingly himself, who was later to could, with a little imagination, 'Permit', not Licence -it was become Chief Engineer of the Its flagship was '2L0, the be deemed to have a Scottish emphasised that the use of infant BBC. London station of the British burr. And where could 5WA be spark was expressly Neither 2MT nor 2L0 was Broadcasting Company', sited except in Wales forbidden. These alone inthe quasi -amateur operating from its (covering Cardiff, but not experimenters took valves into commercial callsigns of the headquarters in Savoy Hill, a much signal up the valleys their stride just as today's 1920s. Others included 2AA of narrow street stretching from and beyond)? Newcastle was enthusiasts master the Radio Communications London's river uphill to The 5NO, but there seemed less microwaves and microcircuits Company in Slough, 5AA held Strand. This new miracle of 'self -evidence' about 2ZY for with seemingly little effort. by the Leicester Mercury, 2KH communication, as it was Manchester or 51T for Much could be unfolded of the Ashley Wireless perceived at the time, earned Birmingham. about the onset of valve Telephone Company at hundreds of column inches Service areas, even of technology, but that must be a Liverpool. Even the London & inthe newspapers of the these 'main stations', were story to be told another time. North Western Railway at period, truly a newsworthy restricted. Soon, relay stations Our present remit is to tell Crewe made sure it got a and headline grabbing were established to fill in the how the new callsign structure callsign. development. gaps as far as the techniques came into existence and to It is more than likely that At 2L0 a modest of the time permitted - and look particularly at one of the many of the amateur type transmitter feeding an antenna many of the gaps remained most famous of them - 2LO. It callsigns issued to commercial on the roof of 2 Savoy Hill was quite extensive. The relays - a belonged to the London companies were applied for in supplanted, before long, by a few hundred watts by contrast station of the British the hope that their holders much more ambitious array with the Main Stations with Broadcasting Company (the would be allowed to undertake on the roof of Selfridge's their kilowatt or two - did not 32 Short Wave Magazine, November 1991 Feature

originate programmes: they callsigns appear to them as just relics. Not so the older resuscitated another relayed what was offeed to relics of another age. Not generation of radio amateurs. memorable callsign made its them via GPO landline from always is this true: at least two To them history, in repeating debut in an amateur context. the main broadcasting of the two -letter callsigns inthe itself with the advent of G2L0 Daventry was the home of the centres. They too were current lists belonged and G2MT, brought BBC's original G5XX long - allocated self-evident originally to the holders' incredulous amazement. wave transmitter of 1925, callsigns: 6FL was Sheffield, grandfathers. Many examples 'Could those famous callsigns known nationwide as 'Five 6BM Bournemouth and 2EH occur of the handing on of the really be around once again?'. XX'. Today's G5XX is another Edinburgh, to name but three. callsigns of beloved but They were indeed! Each was Arield Club callsign. When a When 'the Beeb' became a deceased radio men to their reactivated by a club, G2L0 by 430MHz amateur repeater was Corporation in 1927 most of local clubs. At Cambridge the Ariel Radio Club, open to established nearby, what its callsigns were reallocated G2XV is one. Another is G2NM BBC employees and G2MT by better callsign to give it than to amateurs. Appropriately, whose licensee, the late the Marconi Radio Society. GB3XX! Glasgow's 5SC went to a Gerald IVlarcuse, confounded Appropriately, G2L0 was Both G2L0 and G2MT radio amateur in Dundee. the sceptical pundits of the allocated to the Ariel Club's appeared for the first time in Sheffields 6FL went to a 1920s by demonstrating, unit at Brookmans Park in the 1984 RSGB Callbook, distinguished television entirely at his own expense, Hertfordshire. Here, 55 years allaying fears that they had designer of later years. Some that Empire broadcasting on earlier, the first ever twin - been pinched by pirates! of the ex -BBC callsigns short wave was practical. His transmitter installation had These fears were finally changed hands several times callsign's continuity is been pioneered by the BBC. Its dispelled when QSL cards within the transmitting maintained by the Chichester purpose was to make two bearing the hallowed callsigns amateur fraternity. But not the Radio Club, his memory by a alternative programmes began to filter through to most famous of them all, 2L0. plaqueD a seat in the available to listeners so as to those operators who had churchyard of his south coast offer a choice not available contacted them. Resurgence home. from the single transmitters in The moral of this tale is: When G2L0 (the G prefix the larger cities. Over the next Never treat a two -letter To the generality of British now mandatory, unlike before few years the twin -transmitter callsign with suspicion. If you radio amateurs accustomed to the war) appeared on the service was extended to hear or work one, identify it in talking with stations using bands almost simultaneously provide a choice of the Callbook. You may numeral plus three letter with G2MT, operators writing programmes to much of the discover that you are callsigns, the holders of them into logs must have population. communicating with part of numeral plus two letter thought: that these were, well, A decade before 2L0 was the history of amateur radio.

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Short Wave Magazine, November 1991 33 Review NRD Commun Rece

198-264V. This should cope with all the common supply voltages. The d.c. supply option is primarily designed to take the standard vehicle voltage of description of the remote 13.8V. However, it can operate control commands. There was between 12 and 16V, so is sufficient information for even quite flexible. a modest computer buff to be There were two options for able to generate their own connecting the antenna. Low programs. impedance coaxial -fed The final sections of the antennas are connected to a manual were devoted to standard SO -239 socket on the installing optional units and rear panel, while high general maintenance. For impedance wire antennas The NRD- completeness, this section were connected via a pair of he NRD range of included a full set of circuit terminals. communications receivers diagrams, though the print An external speaker socket 535, from the Japan Radio size was obviously very small. was provided, but instead of Corporation (JRCI has My only complaint with the the common 3.5mm jack, a established a formidable manual was the quality of the phono socket was used. re vie wed reputation among short wave English translation. Some However, this was a switched listeners. For most, these sections were particularly type that disconnected the receivers represent the obscure. How about "When internal speaker when a plug here by ultimate in receiver quality. entering 0 for the display shift was inserted. Keeping with the Because of this, any new mode, the displayed frequency audio side, there was a very model must attract more than may vary, while the Receiver handy line output that Mike just a passing interest. Along keeps a signal existing in the provided OdBm into 60052. with its predecessors, the centre of the receiving band, This output was duplicated on NRD-535 features continuous once caught, without escaping the front panel as a 3.5mm Richards coverage from 100kHz through it, even if the SSB mode is RECORD jack. As this feed was to 30MHz. In its basic trim it's changed." I really think the taken from before the volume also able to resolve all the translation quality could be control it enabled recordings G4WNC, main modes e.g. s.s.b., c.w., improved. This is particularly to be made with the volume a.m., f.m., RTTY and FAX. This important for the descriptions turned down. However, it's model also includes an RS- of the more complex features. important to note that the two is the 232C interface that allows all line outputs were connected in the main receiver functions to Ins and Outs parallel so external devices be controlled remotely by a may interact. Other than the latest personal computer. So let's The NRD-535 boasts a wide obvious use of making look a little deeper to see just range of external connections recordings, these outputs are what you get for your money. designed to satisfy the needs invaluable for connecting from the of the specialist listener. Let's auxiliary decoding units or Instruction Manual start with the power options. audio processors. The final In it's basic form, the NRD-535 audio output is the headphone prestigious A good instruction manual is can be operated either from jack on the front panel. This essential with a receiver of this a.c. mains or an external d.c. will drive 4-1652 units, level of sophistication, and the power source. The standard including stereo headphones. JRC range supplied unit comprised some mains unit is housed inside For those wishing to 56, A4, pages The manual the receiver and can be set for connect auxiliary equipment followed standard practice by 100/120V or 220/240V at 50 or there was an external power of using plenty of illustrations to 60Hz. The tolerance on these socket. The only problem was help clarify the more complex voltages is ±10%, so the NRD- that the output current was points. I was pleased to see 535 can effectively handle restricted to approximately receivers. that also included was a full supplies between 90-132V and 30mA. This somewhat limits 34 Short Wave Magazine, November 1991 Review -535 ica tions giver

its usefulness. Other external connections included scan hold, timer, mute and RTTY mark and space - more about these later. Finally, there was a 25 -way D - type connector for the RS- 232C computer interface. Operation

One of the notable features of the NRD range of receivers is the very business like layout of the front panel. Despite a comprehensive range of features careful design has ensured that each control is well placed. The main display features a fluorescent unit that gives clear visibility under all that were located immediately facilities provided on the NRD- on any channel that has a lighting conditions. This above the tuning control. 535 are not as comprehensive signal that exceeds the display includes a very Personally I did not find these as can be found on a modern squelch threshold. The speed detailed S -meter in addition to to be particularly useful, they v.h.f/u.h.f. scanner, but are of the scan is another the main frequency and were mainly of use when nevertheless very useful. The important aspect and can be channel read-outs. The top changing operating main feature of the scan is its adjusted by the user between section of the display supplied parameters. ability to operate between any 0.5s/scan and to 5s/chan. This supplementary information For rapid frequency two channels monitoring all should cope adequately with such as receive mode, filter changes or when selecting a the intermediate channels. By all normal requirements. data and a number of other specific station the direct entry - keeping all associated Another useful feature was the options. mode was excellent. Using frequencies together you can option to pause the scan at Probably the most used this option, the required increase the effectiveness of any point with a single key control of any frequency was typed in on the the scan. As an example, if press. This is particularly communications receiver is numeric keypad. you stored all your favourite handy if you want to continue the main tuning control. It is One of benefits of a marine s.s.b. frequencies in monitoring an interesting therefore very important that processor controlled receiver consecutive memories you station. One final point with this should be well placed and is the ease with which could set the scan to monitor the memories was the feel good. The NRD-535's memory channels can be just these memories, so giving provision of a lithium battery tuning knob meets both these implemented. The NRD-535 a simple overview of that to ensure that the memory requirements admirably. boasts a total of 200 user - mode. contents were maintained There's plenty of room around programmable memories. while the main receiver was the knob and it has a silky - Each of these can store not Storing & Scanning powered down. The battery smooth feel. As with most only the frequency but receive was accessible from the rear modern receivers, the mode and filter settings even Storing frequencies in the panel and was estimated to frequency changed in steps down to the current a.g.c. rate. memory was very have a life of about five years. rather than continuously. This adds considerably to the straightforward, though you In addition to the basic scan However, the 1Hz (yes 1Hz) user friendly feel of this did have to type in the functions, the NRD-535 tuning steps mean that the receiver. Moving between frequency using the numeric featured a sweep facility. This NRD-535's control is about as your favourite frequencies can keypad as it wasn't possible to enabled the operator to initiate near to truly continuous as be achieved with just a couple transfer a frequency direct a sweep between any two you can get! For times when a of key presses. from the display to memory. frequencies. The steps used faster tuning rate is required, Closely associated with the To use the scan effectively you for the sweep aligned with these steps could quickly be memories are the scanning need to first set the squelch that available for the main set to either 10 or 100Hz. An options. These enable control to mute the inter - tuning control, i.e. 1Hz, 10Hz alternative means of tuning automatic monitoring of the station noise. Once this has or 100Hz. As with the scan was to use the < and > buttons memories. The scanning been done the scan will stop option, the sweep speed could Short \Nave Magazine, November 1991 35 Review

be adjusted over a wide range that the design was clearly which in this case was 0.05s/ designed around achieving step to 0.5s/step. The sweep best performance. As a result option was particularly useful discrete components have for monitoring normally quiet been used in preference to bands for activity. integrated circuits for many of the critical r.f. signal Multi -mode Reception processing circuits. A typical example of this is to be found One of the many areas where in the i.f. amplifier where dual the NRD-535 can be seen to be gate m.o.s.f.e.t.s are used in different from many other preference to an integrated communications receivers is circuit alternative. in the number of receive modes that are supplied as standard. In addition to the ..4# rít Optional Extras c conventional s.s.b. and c.w. it 4 Ít 0nt1ºz Ha1$14zmr . .,,.....,a t features a.m., f.m. FAX and ~UV., .*... Although the NRD-535 RTTY. You may well be asking yf reviewed was the basic specification model, I think it's what's the difference between , s.s.b., FAX and RTTY as far as appropriate to take a look at the receiver is concerned. the range of options that are Well, it's all to do with the available. frequency range of the The first of these is the demodulated audio. For s.s.b. BWC ( Control) reception the displayed which gives the listener a very powerful tool. The facility is (carrier) frequency is required Aview inside the NRD-535 showing how much has been to produce a zero beat. fitted into the receiver. controlled via a knob on the However, for FAX reception front panel and gives the displayed frequency needs continuous adjustment of the to create a 1900Hz audio tone. receive bandwidth. The When resolving RTTY the adjustment range is from same applies but a 2100Hz. 2.4kHz down to 500Hz so audio tone is needed front panel. For those of you should prove extremely Producing these different with more demanding Technical Overview versatile. tones with the same displayed requirements, optional filters For those interested in a.m. frequency is achieved by could be fitted in the narrow I thought it would be broadcast reception the ECSS automatic adjustment of the or auxiliary positions on the interesting to give a brief (Exalted Carrier Selectable local oscillator. The prime filter board. The filters view of how the NRD-535 Sideband) will prove very advantage of the system used available from NRD included handles signal processing. useful. This enables the in the NRD-535 is that the the following bandwidths: One of the key areas with operator to resolve either of received signal is always kept 300Hz, 500Hz, 1kHz, 1.8kHz & any high -quality receiver is the two sidebands transmitted in the centre of the i.f. 2.4kHz. For further processing the front end filtering - the by an a.m. station. The benefit passband. This enables the of the signal at i.f., a Pass object being to eliminate all of this system comes when operator to make best use of Band Shift control was but the wanted signal. The the wanted signal is suffering any auxiliary filters. If you provided. This enables the NRD-535 uses a 35MHz low adjacent channel interference. attempt to receive a high tone operator to effectively shift the pass filter followed by a This type of interference can RTTY signal on a receiver i.f. passband by up to 1kHz diode -switched, seven -band be greatly reduced by without this system you'll with respect the received tuner that feeds the first selection of the appropriate actually be receiving right on signal. This helps to reduce mixer via a second 35MHz sideband. the edge of the filter problems caused by adjacent low-pass filter and r.f. The utility enthusiast is bandwidth. In some cases you channel interference. Another amplifier. This first section served by the CMH-530 RTTY may even find that one tone common problem experienced features excellent filtering demodulator. This can decode falls outside the i.f. passband on the h.f. bands is and helps minimise the risk standard ITA No. 2 causing considerable interference from of spurious responses from transmissions using shifts of degradation in the received a signal within the required later stages The first i.f. of 170, 425 and 850Hz with baud signal. passband. This can be tackled 70.455MHz is amplified and rates between 37 and 75 baud. As you would expect from by using the i.f. notch filter. passed to the second mixer The decoded signal is a receiver of this quality, there This gives a 40dB notch that to produce the 455kHz available for display on a were a number of features can be adjusted across the i.f. second i.f. It's at this second computer or dumb terminal included to assist with the passband. The next i.f that the main i.f. filtering via the RS232C connector on processing of received signals. processing tool was a very and signal processing takes the rear panel. Probably one of the most flexible i.f. noise blanker. In place. For all but f.m. Although the stability of the important are those associated addition to having a demodulation a final i.f. of basic receiver is excellent, with the i.f. bandwidth. In its continuously variable 98kHz is created before NRD offer an optional ovened basic form the NRD-535 threshold, the blanker demodulation. It's at this oscillator. This guarantees a featured three bandwidths: characteristic could be final i.f. that the a.g.c. control frequency stability of 2kHz, 6kHz and 12kHz. These switched to cope with either voltage s generated. ±0.5p.p.m. over the were directly linked to the simple pulse interference or Advanced synthesiser temperature range -20 to receive mode, but the operator the more complex type technigies are used to +50°C and should satisfy the had the option to vary this associated with the supply tie local oscillator most demanding using the <> buttons on the Woodpecker. feeds. One notable point was requirements. 36 Short Wave Magazine, November 1991 Review

Performance view, I found the layout of the exceptionally well in these controls to be excellent. With conditions and was well In the case of this receiver, I've my personal interest in utility within the demanding made an exception to my decoding, I was particularly requirements of FAX review process and have not impressed with the frequency reception. carried out full technical tests. stability of the NRD-535. This One of the comments Abbreviations The reason is simply that the aspect is particularly often made by those using a excellent performance of this important when receiving FAX high quality receiver for the A amps receiver has been clearly images as each image can first time is the apparent a.c. alternating current established by other technical take up to 15 minutes. For this quietness of the bands. This a.g.c. automatic gain control journalists and users alike. reason, it's useful if the is because they are used to a.m. Because of this,I limited the receiver can be left unattended hearing lots of spurious BWC BandWidth Control technical evaluation to a few to receive a number of signals found in many poor c.w. continuous wave spot tests to confirm that the consecutive charts. An even quality receivers. Excellent review model was performing more demanding case exists if front-end selectivity, (Morse) within specification. Needless you utilise the NRD-535's combined with top quality d.c. direct current to say it passed these tests internal timer to trigger mixers, means that in the 535 dB decibels with no problems. unattended FAX reception. spurious responses are kept dBli decibels relative to 11V From the operators point of The NRD-535 performed to an absolute minimum. ECSS Exalted Carrier Selectable Sideband f.m. frequency modulation Specifications FAX facsimile Hz hertz Frequency 100kHz - 30MHz i.f. intermediate frequency Modes RTTY, c.w., s.s.b., a.m., f.m. & FAX kg kilograms Stability ±10p.p.m. after 5 minutes kHz kilohertz ±2p.p.m. after 1 hour. m.o.s.f.e.t. metal oxide silicon Frequency step 1Hz minimum Memories 200 field effect transistor Receiving system Triple superhet MHz megahertz IFs 70.455MHz, 455kHz and 97kHz mm millimetres 100-500kHz 14d611 (24d6µ a.m.) Sensitivity mV millivolts 0.5-1.6MHz 6d61.1 (16d13µ a.m.) 1.6-30MHz -10d13µ (6dBµ a.m., -6d6µ f.m.) mW milliwatts All 10dB s/n (12dB SINAD for f.m.) p.p.m. parts per million Selectivity AUX 12kHz (6dB) r.f. radio frequency WIDE 6kHz (6dB) 15kHz (60dB) RTTV Radio TeleType INTER 2kHz (6dB) 6kHz (60dB) s seconds NARR 1kHz (6dB) 3kHz (60dB) FM 12kHz(6dB) s.s.b. single sideband Dynamic Range 106dB (300Hz i.f. bandwidth) s/chan seconds per Image Rejection 70dB or better channel IF Rejection 70dB or better s/n/ signal to noise PBS Range ±1kHz or more Notch Depth 40dB or more s/scan seconds per scan Antenna 5052 Lo -Z s/step seconds per step Impedance 600! Hi -Z SINAD Signal to Noise And Attenuator 20dB Distortion AGC 10dB or less for 30/ to 100mV signal u.h.f. AF Output 1W into 412 with 10% or less distortion Line Output 1mW into 60012 at 10% distortion V volts RS -232C 4800 baud, 1 start bit, 8 data bits, v.h.f. very high frequency 1 stop bit, no parity VA volt -amps (a.c. watts) Power Supply 100/120/220/240V a.c. ±10% 35VA or less; W watts 12-16V d.c. 25 watts or less Dimensions 330 (w) x 143 (h) x 324mm (d) -C degrees Celsious Weight 9kg approx. 1tV microvolts 52 ohms

Summary The NRD-535 is a logical and worthy successor in this line of well respected receivers. The price is high, but not unreasonable for what is a top quality receiver. I have no hesitation in recommending the NRD-535 to anyone with a serious interest in short wave listening. In its basic form, the NRD-535 costs £1115.00. My thanks to Lowe Electronics Ltd, Chesterfield Road, Matlock, Derbyshire DE4 5LE. Tel: (0629) 580800 for the loan of the review model.

Short Wave Magazine, November 1991 37 Project A Basic RTTY Receive -only Terminal Unit- Part 1

RTTY as a mode tends to be one that is frequently clouded with mystique and newcomers to this fascinating form of communication can be rapidly baffled or put off by the apparent cost of suitable equipment. Bernard J. Greatrix G4ICZ describes his simple -to -build AD -2 receive -only terminal unit aimed at the beginner.

Many years ago, the author an even simpler system was the last few years, and based which tended to limit the use to was tempted to build an ST5 sought - after all it took the around an active band-pass strong signals with very little type terminal unit [1] using best part of ten minutes to filter [3]. The performance is noise. 'junk box' components and load a program that had many certainly not "state of the art" It should be emphasised that Veroboard. This was features I didn't need and in but as the entire project costs this is a basic receive only supplemented by a Creed 7B some instances couldn't only a few pounds to build, terminal unit. The author has machine that served for understand. The aims of the even using brand new used one with an LM324 totally many years as a moderate, if exercise were to: components, it should enable powered with 5V d.c. from a noisy and bulky transceiver of a. Produce a design which the newcomer to RTTY or Commodore 64, but its RTTY, to say little of the many was as simple as possible, those who may be tempted, performance is lower than a 'happy' yet frustrating hours whilst maintaining a but put off by the cost of high similar unit with dual polarity cleaning and oiling the beast. reasonably efficient operation performance/high price rails. Having dispensed with this and that didn't use 88mH commercial equipment to at At the end of the article is a combination, and in later inductors. least try the mode and having very simple RS232 -based years drifting towards home b. Keep costs to an reached the limits of simple terminal program for use on the computing, the idea of another absolute minimum - expanded devices move on to the more Commodore 64 which shows RTTY station was reborn, with as the project progressed to elaborate. just how simple receiving the thoughts that progress include both software and The original prototype was programs can be if you are would have improved upon hardware costs. built using single 741 devices prepared to dispense with past performances. Scanning I also wanted to power the with subsequent versions tried 'memories', 'type ahead' and the the adverts soon revealed that terminal unit from the out using quad op -amps using like.I have only used the considerable sums of money computer supply (+5V) and so both dual and single polarity program on the above machine could be spent on commercial eliminate some of the supply rails, i.e. CA084 or but it is believed that the same terminal units and software. connections which had to be LM348 and LM324 devices program could be used with Needless to say the old ST5 made. respectively. The dual polarity other Commodore machines was resurrected and a This final aim, alas, was not version is shown in Fig. 1.3. such as the Plus 4 as the 'basic commercial RTTY program achieved to my satisfaction and options are discussed dialect' and memory locations purchased as this seemed to and will be discussed later, but later. Little or no difference are very similar. Other popular be the most cost effective with the experimentation was observed in the home micros such as the solution. I was on the air again which ensued the AD -2 performance of either of the Spectrum and BBC are at an outlay of slightly less terminal unit came into being. first two devices suggested understood to have user ports than £15 (discounting the cost above, although using the and equivalent communication of the computer and radio Amalgam of Ideas LM348 at only +5V demanded capabilities. The appropriate transceiver, of course, which significant changes to the user manuals and reference had other applications, The design is an amalgam of component values. It was also texts would need to be consulted anyway). ideas which have appeared in noted that the circuit O was before any connections are Being an eternal optimist, a variety of magazines over much lower than calculation, made to these machines.

1275 Positive Low pass -- filterr output filter

Digital Audio Limiter from RX output

Negative Low pass output filter

Fig. 1.1: Block diagram of a basic receive -only terminal unit.

38 Short Wave Magazine, November 1991 Project

Fig. 1.2: Active band-pass filter calculations. Cl

How It All Works IC2 and IC3, providing 1. Select a value for C. frequency discrimination. The 2 Select a value for Q where Q = Fo/Bandwidth. The block diagram of a RTTY filters are set independently by 3. Select a value for Av where Av = gain. receiver converter is shown in R8 and R9 to the required 4. Select a value for Fo where Fo= centre frequency. Fig. 1.1. This shows how the frequencies (1275 and 5. R1=Q/(Av*Pi*Fo*C) two tones (1275 and 1445Hz - 1445Hz). At this stage I should 6. R2=Q/((2*Q2- Av) *2*Pi*Fo*C) in amateur circles at least) of a explain that the surrounding 7. R3 = 2 * Q/(2 * Pi * Fo * C) RTTY signal are separated, component values were individually processed and re- calculated using the formulae combined to provide a serial given in Fig. 1.2 [3] and to digital signal suitable for ease this effort LISTING 1 consumption by either a gives a computer program mechanical 'Telex' machine or enabling the user to try as a computer -based system. many changes as is though C5 Audio from the receiver necessary with the headphone socket or, components to hand. preferably, a 600Q line, is first My own values were: C = passed through a passive low- 15nF - the junk box had about pass filter formed by R1, R2, two dozen of these;Q = 26; Cl and C2 giving a 3dB cut-off Bandwidth = 55Hz (i.e. approx at approximately 2.5kHz. 25Hz either side of the Signal overload is prevented necessary tone, plus a bit for by diodes D1 and D2. drift); Av = 0.9 - Less than 1 to Integrated circuit IC1a prevent 'ringing'; Fo = 1275/ operates as a high gain 1445. The program also allows amplifier, so the output is a for 1700Hz and 2125Hz, thus constant amplitude square permitting 425Hz and 850Hz wave for audio input signals shifts occasionally found on greater than 250mV. At this h.f. transmissions. point the signal is split and fed Following selection of the Fig. 1.4: Modifications to the circuit of the AD -2 terminal to two active band-pass filters two wanted tones by IC2 and unit to add extra shifts and variable shift.

C5 15n II R70 390k ox R4 5M6 Sta D3 R17 R14 5M6 Normal 1N4148 22k SK1 +12V Audio input from RX Al R2 R3 R16 1k8 1k8 22k 417 13 R18 C 4k7 I Output D1 1N4148

R7 220k C4 00V 15n q S1b D4 R15 Reverse 1N4148 22k Fig. 1.3: Circuit diagram of the I1 R;1" 390k AD -2 terminal unit. The area Y II within the tint is also shown, with C6 modifications for multiple shifts, 15n in Fig. 1.3.

Short Wave Magazine, November 1991 39 Project

IC3, the tones are rectified visual display. My own Abbreviations and filtered by D3, D4, R12 - preference is to connect the active filter outputs to the X R15, C7 and C8 to provide d.c. direct current and Y plates of an alternative positive or dB decibels negative d.c. levels, which are oscilloscope (a rather old Hz hertz Heathkit 0S2) providing a then combined and amplified kHz kilohertz rather rounded cross when by IC4 to provide the required mH millihenries serial digital output. Diode D5 correctly tuned to the mV millivolts is added to provide 'belt and incoming signal. Incidentally Q 'goodness'of a tuned circuit the sharpness of the braces' protection of the RTTY RadioTeleTYpe horizontal and vertical computer. All that remains V volts now is to buffer this signal to ellipses forming the cross is 12 ohms suit the computer. also a rough measure of the filter Q. A small d.c. Tuning amplifier/buffer with I.e.d.s will also give an indication 10 REM :::Listing No 1. Tuning to a RTTY signal can of the state of tuning but I 20 : be done very simply by ear - find them rather difficult to 30 : the aim being to hear both assess due to the constant 40 REM ACTIVE FILTER CALCULATOR tones equally, but is best flickering. 50 REM TO CALCULATE RESISTOR VALUES done with some form of 60 REM FROM REQUIRED PARAMETERS 70 REM ::: G4ICZ JANUARY 1991 Acknowledgements and References 80 : 111 ST -5 Radcom March 1977 page 202. 90 : 121 RTTY the Easy Way BARTG 100 FOR X=1 TO 4: READ F(X): NEXT [31 ARRL Handbook 1987page 7.10 110 DATA 1275, 1445,1 700, 2125 [41 Commodore 64 Programmers Reference Guide. 120 : 130 INPUT "ENTER BANDWIDTH HZ"; BW 140 INPUT "ENTER GAIN (EG 0.6)"; AV 150 INPUT "ENTER CAPACITANCE (EG 22E-91"; CA In Part 2 we will start the 160 PRINT: PRINT construction of the AD -2 170 PRINT " HZ R1 R2 R3 Q" terminal unit. 180 FOR X=1 TO 4 190 Q=F(X)/BW: W0=2*PI*F(X) 200 R1=INT(Q/(AV*W0*CA)/1E3+.5) 210 R2=INT(Q/((2*(2^2-AV)*W0*CA)+.5) 220 R3=INT((2*Q)/(W0*CA)/1E3+.5) 230 PRINT F(X); R1"K "; R2;" "; R3"K";" "; INT(Q+.5) Fig. 1.5: Graph showing gain and phase y frequency as 240 NEXT X produced by Number One Systems ANALYSER II software Note PI is available as a 'shifted' character (just to run on a 286 PC clone. The graph was plotted using Excel the left of the RESTORE key) on the CBM64. on a Macintosh SE.

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Short Wave Magazine, November 1991 i / 'ale< o9 0-277

by Ron Ham Faraday, Greyfriars, Storrington, West Sussex RH2O 4HE.

It soon became obvious reading the missed, Patrick Moore (Selsey) made reports I received, from astronomers a drawing, Fig. 1, of the groups and and radio enthusiasts, that the sun spots he was able to project at 1140 on was very active in August. Clive Brook the 5th and again at 1030 on the 10th, (Plymouth), using a tripod -mounted Fig. 2. refractor telescope with a projection box and screen, counted 12 sunspots Solar Noise & Effects Fig. 1. Fig. 2. and 2 groups on the 3rd; 10s/2gps on the 4th; 7s/4gps on the 8th; 3s/2gps on Henry Hatfield's radio telescope re- were observed by Bob Brooks (Great pressure, from July 26 to August 25, the 10th; 6s/4gps on the 12th; 21 s/4gps corded, on a paper chart, individual Sutton) on the 4th, 7th and 13th. will also be found in my television col- on the 16th; 26s/5gps on the 18th; 34s/ bursts of solar noise, at 136MHz, on I counted at least 24 East European umn. 4gps on the 21st; 33s/5gps on the 22nd; days 16, 20 and 26 and at 1297MHz on f.m. broadcast stations between 66 and I received several strong broadcast 14s/4gps on the 26th; 12s/4gps on the the 20th. Em Warwick (Plymouth) pe- 73MHz at 1955 on the 24th. Andrew stations from France while parked near 27th; 12s/4gps on the 28th; 22s/4gps on riodically heard the 'hissing' or Jackson (Birkenhead) heard stations, Goodwood on the 19th and heard a the 29th; 22s/6gps on the 30th and 24s/ 'who0Ooshing' of solar noise, around most likely from Germany, Italy and variety of continentals spread through 6gps on the 31st. 28MHz, on days 2, 4, 13 and 21. Fred Yugoslavia, between 99 and 103MHz Band II while the pressure was high At his observatory in Bristol, Ted Pallant (Storrington) reported a, 'high on the 15th. (1021mb) at 1930 on the 24th. Andrew Waring counted 56 sunspots on the level of solar noise all day', on the 19th. Jackson received Band II transmis- 18th and 22 on the 26th. In Sevenoaks, With this sort of activity, it was no Propagation sions from several stations in Ireland Cmdr Henry Hatfield, using his surprise to learn that Em Warwick on days 15, 18, 19, 20, 24, 29 and 30, spectrohelioscope, located 2gps, 14 found the 28MHz band 'dead', attimes, First, my thanks to Chris van den Berg 'JAZZ FM' from London on the 18th, filaments, 6 quiescent prominences on days 3, 4, 5, 6, 9, 11, 17, 19 and 23. (The Hague), Gordon Foote, Ted Owen Belgium (Studio Brussel) and various and 'a medium to large anvil shaped Fred's comment for the 27th and 28th (Maldon), Fred Pallant, Ted Waring and transmitters in Holland (NOS 1, 2 & 3) prom.' on the east limb at 1412 on the was, "Two very 'quiet' days -like Ern Warwick for their 28MHz on the 20th, France (RF Picardie) on 12th;a similar reportbutthe'anvil prom' someone has stolen the ionosphere". logs from which I preparedthe regular the 29th and Germany had gone on the 13th; a chain of 23s/ The extent of the 'blackout' on the 6th chart, Fig. 3, covering the period July (Deutschlandfunk & Hessischer 10fs/5gps/2 small very bright plages is clearly seen in Fig. 3. 26 to August 25. Signals from a new Rundfunk), plus Radio's Broadland and and a thin filament at 1117 on the 16th; Gordon Foote (Abingdon) and Ern beacon in Australia,VK8VF,were heard Norfolk on the 30th. similar conditions plus a small flare at Warwick, betweenthem, heard one of by Ted Owen, Fred Pallant and Ern Although at a camp -site 1.5km the east end of the long chain at 1410 the German propagation beacons, Warwick on those days indicated. south of Banchory, surrounded bytrees on the 18th, 55s/24fs/9 small qps at DKOWCY on 10.144MHz, giving auroral During the month, Ern also received and 300m high mountains on all sides 1425 on the 19th; 55s/17fs/13gps at 1045 warnings atvarioustimes on days 2, 3, signals on an occasional basis from exceptthe north, "where there's just a on the 21st; 2gps/17fs/13 qps/a small 4, 11, 12, 14 and 15. IK6BAK (24.915MHz), PY2AMI (24.931 forest to cut out the DX", the opening loop prominence on the east limb at & 18.100MHz), PT7BCN (21.150MHz) on the 30th and 31st was good enough 1115 on the 26th; 3gps/24fs/13gps/2 Sporadic -E and almost daily from ZS6DN and to enable David Glenday(Arbroath),to small hot spots at 1130 on the 29th; 4X6TU (14.100MHz) and DKOWCY hearthe Norwegian NRK Radio in Band 4gps/19fs/9gps at 1425 on the 30th and Reference to the Band I (48-68MHz) (10.144MHz). II on both days. the same exceptfor8lessfilaments at section of'dxty roundup', elsewhere in While George Garden (Edinburgh) 0945 on the 31st. this issue,will showthatvarying spells Tropospheric was TVDXing on Cairn '0 Mounth on Despite averyhazysun,whensmall of Sporadic -E were observed almost September 2, hetunedthrough Band II groups and spots could have been daily throughout August. Long periods The daily variations in atmospheric and found a strong stereo signal from a foreign station, transmitting 'pop' July August music around 102MHz and, near

Be3co[726 7 8 9 30 1 23 4 1 i 567 8 9 10 2 34 5 6 7 8 920 l 2:1 4 5 104MHz, there were two very strong DFOAAB x x x x x x x x x x xxxx XX x X xx signals from the new Scottish BBC DFOTHD x x x x x x x xx Radio 4 transmitters, possibly Ashkirk 010I0íx x x x x xxxxxx x x xxxxxxx xx x Darvel or Rosemarkie. George also EA3JA x x x x x x x x x x xx x xxxx x x heard this signal while driving between EA6RCM x x x x xxxxx x x x x x x x xxxx xxx xx Edinburgh and Laurencekirk at 0830 on IY4M x x x x xx x x x x x xxxxx x x x x x x x x xx x xx August 31. IiGSGEW x x x x x x x x x xx x xxxxxx x x On the right of Fig. 4, is two BBC KD4EC x x. engineers, at Parham House, near KF4MS x Storrington, carrying v.h.f. back -pack L.ASTEN x xxx xxxxx x x x x x x x x xx transmitters being briefed just before OKOEG x x x x x x x xx x xx x x xx xxxx the start of the 'live' programme A OII2TEN x x x x x x x x x x x xxxxxxxxxxx x x x House in a Garden transmitted on Ra- PI7BQC x x x PI7ETE dio 2 during the afternoon of June 27. x x x Each of these 'mobiles' worked with PT7BCN x x x x xx x x x x PY2AMI the programme presenters, Gloria x x x x x x x x x xx x xxxx x xx xx xx x Hunniford inside the house and Alan SK5TF_.N X X x X X x X X xx xxxxx x xxx x x x x x VK2RSY Titchmarsh in the garden. x x x xx x xx VK4RTL V1(514[ x X x xx xxx VKf,RWA x x xx VK3VF x xx WA40JS X y W3V;i ZD8HF xxxx x x x x:: XX X X X x XXXXXXXX X X X x ?1_2M,IiF x "::',1.A x x x x xxxx 7.55 VHF xx ZS6PW X X X x xX X X X X xxX x X Xx x x x x x x x x x x XXX Z21ANB x. x x x xx x x. X x X XX X x Xx x X x X X x X XX xxx x X 5P.4CY x xx xx xx xxx x x x x x x X X X X Fig. 3. 42 Short Wave Magazine, November 1991 ui'///i' ////ii<

It is with great regret that the gov- Black(south:asforBlackto Loach way towards Nigeria. Paul has also 9.495MHz on September 12, which ernment of SSB Utilities has voted to then 58N 050W - 59N 030W - 59N 020W come up with some more callsigns: sounds like a radar controller passing severely restrict its immigration quota - 59N 010W - Leuchars, etc. Gambler, Nickel, Switchblade and information on targets that are clearly of stations that do not speak in plain Black (north): as for Blackto Loach Tiger are Upper Heyford. aircraft. Only one station can be heard English. This situation has been forced then 58N 060W- 61N 040W- 61N 030W Evergreenand Ramrodare and that uses the callsign'Baker'. The on us by a flood of immigrants from -61N020W-61N010W- Leuchars, etc. Lakenheath. other station, which is belowthe noise, Numberstationland who have been I am indebted to Ron for a long and Banter Control is Mildenhall con- is 'Delta 9 Quebec'. All targets are wandering inthe desertfor manyyears detailed letter on the subject of the trolling tankers. referred to by tracks that are tagged in search oftheir gurus, Havana Hanna, tracks. My only regret is that I do not Three Geese is Fairford again with letter/number identifiers such as Berlin Betty, Moscow Mike, etc., and have space to include all the other controlling tankers. 'Golf Echo 432' and on the tape, all the now think they've found a substitute in information he supplied as well (an- Raymond Zero One is Langley Air targets are identified as 'friendlies'. All this column. The resident utilities other time maybe). Force Base in Virginia USA. map coordinates use a letter/number population has startedto complain and War 46 is the National Command group such as NLJD54 and there is in future many applications for visas You Write Authority at Fort Ritchie in Maryland in referenceto the 'interesting area'. This are likely to be stamped 'barking mad' the USA type of radio traffic is not unusual on and rejected by the chief immigration Before I startwith any logs, can I remind Paul mentionsthatthe Presidential the military bands, butnowthe mystery: officer (me), unless they have startling you that I cover s.s.b. utility stations back-up aircraft (SAM26000) appears The frequency is slap in the middle of new information. (usually h.f.).I saythat because quite a to follow the presidential aircraft (Air a broadcast band and the controllers number of you have sent in a variety of Force One) just about everywhere and accent is not British or American even Sanity Regained listingsforsuchthings as military u.h.f. has been heard on 6.680MHz recently. though he speaks in English. At times, operations,which do notfallwithinthe Paul also logged Alconbury on the accent seems to be Irish but then Ron King has never mentioned a scope this column. I have no objection 4.477MHz with an E3 AWACs 'Big at others it sounds South African, al- numbers station to me. This kind and to this because I am an avid collector Daddy'. He's also gotthe numbers bug though I suspect it is neither. well adjusted man usedtoworkforthe of frequencies, but unless it is s.s.b., it now and heard a female reading I have monitored the frequency operations departments of is unlikely to get a mention (it may be numbers followed by the Lincolnshire severaltimes butnotheardthe station. Transamerica and Air Europe and he this column has no readers left by now Poacher on 9.251 MHz. Keep a listen outforthis one and if you wrote the Complete v.h.f. and u.h.f. but I will press on). Peter Finn also believes that some can identify it let me know and Iwill Airband Guide. Ron has provided some Paul H of Newbury has again sent of the transmissions on the frequency pass the word on. very useful information on how the in some goodies and revealed that the may be from the UK as the signal is Tom Davies has sent logs from military use the North Atlantic tracks. reason he is able to spend so much often very strong in South Wales. South Africa and he has a good path They use seven routes across the time monitoring is that he works shifts. Peter also wonders if some of the into Pacific and Far East areas. His log Atlantic, which are all referred to by On August 7, he monitored the evacu- reports sent in by foreign correspond- includesAucklandVolmeton colour; Blue, Red, Brown, Yellow, ation of oil rig workers fromthe Fulmar ents use s.s.b. radio links, as they have 6.679MHz, Singapore and Bangkok on Black, Orange and Purple. Black is Alpha rig on both 5.680 and 5.695MHz. that typical sideband sound to them. I 8.942, San Fransisco on 11.282 and further split into two extra options of The next day, he monitored Ascot 2100 am not aware of any dedicated press Honolulu on 13.089MHz. Tom uses a Black south and Black north. with ex -hostage John McCarthy re- links, but there may be one of two Kenwood R-1000, Sony ICF 2001D and The only ones that make landfall in turning to RAF Lyneham using the possible explanations. First, the qual- feeds them via an a.t.u. from an indoor the UK are: callsign'Crystal' on a 'phone patch via ity of telephone links from some helical antenna mounted in his loft. Blue: Sept Iles (Tacan) - Goose 'Architect' on 9.032MHz. countries is very poor and the heavy Bay (Tacan) - Scrod (5437.0N Paul has finally managed to hear filtering that sound engineers need to 0555Z.OW) - 55N. 050W - 5SN 040W - US customs on 11.494MHz trying to use can leadto a slightly hollow sound. AndFinally 55N 030W - 56N 020W - 56N 010W - intercept a possible drug running Secondly, it quite conceivable that Macrihanish (Tacan). running aircraft near Jamaica. It in- radio links are occasionally used, but Before I sign -off, an apology if your log Red:Yarmouth (VOR) - Halifax(VOR) volved ground stations 'Slingshot', probably through existing services has not been mentioned. Unfortunately, - Sydney (VOR) - Ramea (NOB) - Vysta 'Home Plate' and 'Almighty' with air- such as those offered by Portishead a major mix-up happened during the (4830.8N 05244.7W) - 49N 050W - 50N craft 'Kodiak 04' and 'Tijuana 41'. They and Stockholm Radio. previously mentioned alterations to 040W - 50N 030W - 50N 20W - 50N 10W did not quite managed to catch the Chateau Rouse. Early in September, - Land's End IVOR. aircraft before it landed. Mystery some of the letters received over a Black: Eric IN DB) - Hadok (5426.5N During September, he spun the dial period of about three weeks were in- 5955.3W) - Loach (5531.ON 5701.0W) - of his FRG -7700 onto a USAFfrequency Now the mystery of the month, which advertently destroyed. If you sent in 56N 050W - 58N 040W - 60N 030W - 60N and heard Air Force Two (SAM29000) has been sentin byChris Broughton. He snippets and were not mentioned, you 020W- 60N 010W- Leuchars -Coltishall. with the vice-president winging his sent in a tape of a station monitored on now know why. Be sure of getting your copy of SWM each month. Place this regular order form with your newsagent... today

near Newsagent, Distributed bySeymourl please reserve / deliver my monthly If you can't see SWM on the copy of SHORT WAVE MAGAZINE bookshelf at your local outlet, NAME please call the Editorial Office in ADDRESS Poole and we will talk to our distributors to find out why! LSigned

Short Wave Magazine, November 1991 43 20f2i (ó / 73CC- 2/YEI

NORTH AMERICA Gerry Dexter, RR4, Box 110, Lake Geneva WI, 53147 USA.

Once again it's time for our quar- 4647 South American Notes terly look atwhat's happening on short Old Hydes Ferry Pike Nashville, TN 37218 USA wave in the Americas and, as usual, Radio Frontera, San Antonio, Ven- there seems to be a lot of news. ezuela, which had been inactive on 15,690 KHZ Some of the most interesting lis- 7,520 KHZ short wave for several years has re- tening targets of late aren't the rare, turned to its old 4.760MHz frequency. hard to hear DX stations but simply r00 Well, nearly. Actually, it's 4.761MHz. unusual programmes paid for by spe- It's being noted in to sign off at 0257. cific interests and aired on some of the Radio Nacional del Ecuador is an- independent US short wave stations. other station that was long active on One of the most recent additions is short wave. They were gone a long Croatian Radiolagreb, a daily one hour time and have been back for quite programme produced by the station awhile, but it seems a lot of listener's based in the Croatian capital and aired aren't aware of the fact. Perhapsthat's over LeSea Broadcasting's WHRI, In- V7W(C2 because Radio Nacional doesn't have diana at 0000 nightly on 7.315M Hz. The their own station. Instead, they're programme is intended for Croatian World Wide Christian Radio heard via HCJB for half an hour per expatriates and those who left Croatia day, at 1730-1800 on 15.220MHz with a in recent years in order to escape programme in Spanish called Letter to communism. Of the hour long broad- Ohio s.w.l., Ed Turner, loves old Hallicrafter sets. He has a shack Absent Ecuadorians. You can QSL cast, 15 to 30 minutes isin English. full of them! Radio Nacional by sending your report Croatian Radio Zagreb, a name only in case ofthe OXPartyLineprogramme adopted in 1990, claims it is the oldest Washington. Telephone lines had to radio operators who work at the at HCJB. station in Southern Europe. be used for several days until a new Bethany installation have arranged to The correctname ofthe Colombian Radio Miami International, a station satellite dish could be put up at the issue special QSLsdirectforreception station on 5.535 mentioned last time is planned to beam to the Caribbean, Tinang transmitter site. of the Bethany relay. That's most wel- Ecos Celestales. It's a religious station, hasn't gotten the go-ahead from the The Monrovia relay site in Liberia come! And wouldn't it be "'overly' if all located in Medellin.Address:Apartado FCC yet. While itawa its positive results is said to be in very bad shape afterthe relay sites would do that! Aereo 8447. it is buying time on WRNO, New Orle- civil was there. It's hoped Monrovia Radio Nacional Colombia is re- ans. Its Spanish language broadcast will return but no one seems to have Washington Talk portedto now have a bit of English in its begins at 0200 on 7.355MHz. Sofar,the any idea when that will be. Before too schedule, namely on Saturdays at2100 planned Radio Copan International, much longer the VoA will have a short It looks virtually certain that - eventu- for a 15 minute programme called Co- Honduras, also planned by Radio Mi- wave relay on the air from Botswana. ally- surrogate broadcasters Radio lombian Cultural Magazine. Frequen- ami International hasn'tshown,though Construction should have started by Free Europe and Radio Liberty will be cies are 9.635, 11.825, 15.335 and it is still expected and may be active by now on a new relay site in Sri Lanka merged or swallowed by the Voice of 17.865MHz but these can vary a great the time you read this. thatwill eventuallyfeaturethree 500kW America. One study is already calling deal! Radio Miami International is also transmitters. The proposed relay in for Radio Free Europe to discontinue acting as a middleman in arranging Israel is, however, in trouble again. programmes for Poland, Hungary and No Go on Guam airtime for a number of anti -Castro The Israeli High Courthasforced a halt Czechoslovakia, and that would likely Cuban organisations that are now in construction until a study can be be the beginning of the end. Disagreements with the local govern- broadcasting programmes intended for completed on the environmental im- But perhaps not for the idea of ment over who has title to what has listeners in Cuba. Most of these are pact the facility would have on the government -sponsored surrogate prevented High Adventure Ministries being aired over WWCR, Nashville, Negev Desert. broadcasts completely. Besides Radio from getting its KHBN on the air, even Tennessee, some of them on a nightly Still more VoA 500kWers are on Marti, beaming to Cuba via VoA though the equipment has been on basis, some only on one day of the line now. The big guns newly installed transmitters, one US Senator is calling Guam for more that a year. It is very, week. at the Bethany, Ohio site were testing for a studythat might lead to an RFE/RL very likely that High Adventure will Radio Free New York, a pirate -like in late summer/early fall. The amateur type broadcaster beaming at China. give up on Guam and put KHBN on the programme that was aired weekly on air from somewhere else. WWCR has discontinued its broad- casts. Bynow,though,something quite Other News interesting should havetaken its place. The new programme will be of special Let's note the return of still another interest to s.w.l.s and radio hobbyists! station that's had some down time. Speaking of WWCR, it now has its Sani Radio, the religious/cultural sta- second 100kW transmitter on the air tion in Honduras that was active on and rumour has it that yet a third such 4.755MHz for a time has returned. It is unit is on order. There seems to be still announcing its frequency as 4.755 more and more evidence that there but it's actually on 6.299MHz variable, are a lot of groups willing to pay to get running to 0000 sign off in Spanish and their own programmes out to the in- Miskito. ternational short wave audience! Radio Canada International's The possible rebirth of currently Sackville transmitter continues to be silent KCBI in Dallas that was men- the source of more and more relays. tioned lasttime has still not happened, The latest is something a bit unusual. even though a summer season fre- The Cyprus medium wave station Ra- quency schedules was arranged. dio Monte Carlo Middle East should, by now, be airing a15 minute pro- VoA Notes gramme at 0400-0415 on 5.960 and 9.755MHz. RCI will get time on the Cy- The Voice of America's Philippines prus station. relay station had problems due to ash from the Mt Pinatuba volcano eruption Tenessee short wave station WWCR makes a living by airing a last June. The ash, plus wind and rain wide variety of paid programming, including shows from anti - That takes care of things for this caused a loss of the satellite feed from Castro groups. time. Good listening! 44 Short Wave Magazine, November 1991 Clayton Wood Close West Park DATONG Leeds LS16 6QE ELECTRONICS LIMITED Tel: 0532 744822 Fax: 0532 742872 For productsyou can rely upon to give amazing results For information on Active Antennas, RFAmplifiers, Converters, Audio Filters, the Morse Tutor and Speech Processors send or telephone for a free catalogue and selective data sheets as required. All our products are designed and made in Britain. Orders can be despatched within 48 hours subject to availability.

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46 Short Wave Magazine, November 1991 ?*,c--)/1/1/7117~

Roger Bunney, 33 Cherville Street, Romsey, Hants S051 8FB. The Teleclub film channel over Astra 1A 11.332GHz horizontal, received in South Africa by Ian Roberts. AsSky viewers may be aware, markedly in recent weeks judging by more difficulties have been experi- the sparklies noted this past week. enced on Astra 1A and again it's Sports feeds (golf) have been carried problems in attitude control. During overthe North Atla ntic path via Intelsat the afternoon and into the evening of VI F4 on a leased Brightstar trans- September 1, the electronics control- ponder 11.12GHz vertical early in ling Momentum Wheel no.1 'showed an September. CBS TV New York was anomalous behavior. As a conse- carried over colour bars on Eutelsat II quence, the spacecraft lost its correct F2, 10°E at 10.98GHz horizontal on Au- pointing, which resulted in lossoftraffic gust 26, an unusual sighting and the Middle East in all transponders' i.e. the satellite feed suddenly dropped carrier with no Broadcasting (MBC) is swung awayfrom earth and all signals indication of source or reason. Another now operational, part - both up and downlinks - were lost. new programme is the MBC - Middle of the station opening Signal loss was from 1543-1955UTC. East Broadcasting on Eutelsat IIF1, montage depicts two SES at Chateau Betzdorf actioned a 13°F 11.554GHz horizontal now carry- satellites transmitting spare momentum wheel to take over ing test programmes through to MBC signals back to control. The following day, Astra 1B Christmas - programmes started Sep- earth, the two seemingly still had a problem with at- tember 18. satellites are Eutelsat titude control though since then, no A BAE Starbird TES (transportable 13 E and Arabsat 19/ signal loss has been observed - read- earth station) has been operating out 26 E. ers may recall that a similar problem of Moscow seen with identification occurred on June 4. over Eutelsat I F4, 7°E with a WTN Olympus, the rogue satellite, has Moscow caption (World Television now been recovered and is now on News). Check out 11.18GHz horizontal! station back at its original slot of 19°W. The CNBC News programme for Super Colour bars and from On May 29, last incorrect signals from Channel is usually carried over the Nittedal Earth Station, the Italian Fucino ground station in- Brightstar permanentlease 11.505GHz seen over Intelsat at structed the satelllite to swing away vertical, recorded in at Super Channel 1 W. ITTEDAL from its normal station keeping positon, for subsequent screening. And 'ITN 0969 MN2 as a resultthe batteries ran down and SNG1 UK17' has been carried over rocket correction fuel froze. The bird ECS II F2 10°E at 10.98GHz horizontal INT 5R FI2 then drifted eastwards at about 5° per during the evening of the 14th with ORWEG I RN day but, following a succession of colour bars, eventually cutting carrier correction signals from high powered 2230 with no other video seen. ELECOM ground stations, control was re-es- ORWR- tablished. Batteries were recharged, Satellite DX ? fuel thawed and the wandering satel- lite was returned to its original slot. Though most staunch TVDXers feel British Aerospace (Stevenage) was that satellite reception is not really their4th inthe series of IntelsatVl craft Southern Sweden. A recent decision prime mover in the rescue bid, which TVDX in the true sense, there are was successfully launched in August in Berlin suggests that D2MAC will be utilised several ground station sending occassions that suggest DX is seen. and is now located at38°W, where it is avoided in the interests of adopting a many thousands of commands over a For example I have been logging the undergoing a series of tests. The At- PAL Plus standard. 3 month period. three Israeli programme feeds from lantic slot allows access between the British Aerospace now have an With a more stable situation now in Intelsat VA F12, 1°W -in theory the States and Europe for testing of the 38 involvement with the Motorola low the USSR, there have been far fewer signal is tightly spotted into Tel Aviv C Band and 10 Ku band transponders. orbiting Iridium project, a system of 77 news feeds via the Gorizont satellites and invisible in the UK - at least on a Tests should be complete bythe end of low orbit satellites that will provide at 11 & 14°W. In fact, 11 ° has been very 1.5m dish. September and the satellite will then communications overthe globe during inactive during the latter part of Sep- However, the honour this month is be moved to its permanent orbital slot. the late 1990s. tember. Visnews still carry feeds over credited to Ian Roberts in South Africa A life of some 15 years is anticipated. Concern has been expressed by 14°W at selected times of the day - but who is receiving watchable signals Note: though the tests are not sched- SES Luxembourg over the use of the attention has tended to focus on Yu- from the Astra 1A satelllite orbital at uled,itis possible to receive test higher powered series II Eutelsat craft goslavia. An insight into the country 19.2°E, as is his friend Charles Vana, transmissions if you are fortunate at 16&21°E. The fear is of co -channel and the general situation can be seen 100km south of Johannesburg! Ian has enough to monitorthat dish heading at interference to certain TV channels in the daily programmes on Eutelsat I sent several pictures of his reception the correct time, I once saw tests at carried over the Astra satellites. The F4 - 7°F via the RTV Beograd pro- on his home -constructed glass -fibre midnight! Eutelsat meanwhile have use of 600mm Astra dishes with their gramme 11.178GHz horizontal starting 3m dish and 1.1dB noise LNB. The announced a delay with the launch of relatively wide forward pick-up lobe is around 1700 through to 2200 approx. picture shows a bandwidth of 14MHz their Eutelsat II F3 destined to slot at such that insufficient rejection of the An additional 3 hour news programme sufficientto passthe audio subcarriers, 16°E, hopefully end October. nearby Eutelsat satellites will result. is also being downlinked over (sur- carrier to noise of about 6.5dB (2dB There is divided opinion amongst Eutelsat have been unresponsive! prisingly) Eutelsat I F5- 21.5°E at below threshold), larger dishes to 6m Europes satellite broadcasters over Postscript -reader Chris Levy from 11.471GHz from about 1830, again ex will provide noise free reception. Sig- the European Council's directive for Romsey uses a standard Amstrad Belgrade. The 11.148GHz horizontal nals received are horizontal Astra 1A the adoption of D2MAC asthe on -going satellite receiver and 600mm dish and transponder over ECS II F1 13°E was downlinks of Screensport, Lifestyle, standard for transmission. BSkYB and has been using the system to search seen carrying war footage ex Yugo- Teleclub and RTL4. Other 'DX' suc- Filmnet are both opposed to D2MAC for other orbital craft and has suc- slavia via an EBU circuit on September cesses are from Eutelsat I F4. 7°E with whereas SCANSATIthe Scandinavian ceeded in good reception from 18 during the evening for various Eu- noisy mono pictures from the ET -1 cable TV group) thatcurrentlytransmit Eutelsats at 13, 10 & 7°E, with fair re- ropean broadcasters. (Greece) feed 11.55G Hz horizontal. Ian in D2MAC are infavour of the standard. ception from sound in sync newsfeeds The French 'TV Sport' downlink is estimates that the Astra signals are Further representation is to be made to at 21°E. being carried over Eutelsat II F2, 13°E about 27dBW on the stronger signals the EC by commercial broadcasters This shows that it is possible to use at 12.7GHz (Telecom band). Eurosport (25dB down on the main boresight objecting to the enforcement of the the simplest of equipment for multi - appears on yet another satellite, this centre at 52dBW). MAC standard. Inc idently,Scansatare satellite reception.If any reader is time the French Telecom 1A, 8°W part of the organisation that has suc- considering this approach to combine 11.66GHz with English/French lan- Orbital News cessfully applied for the Swedish first both domestic and hobby satellite guage subcarriers - downlink signal commercial national TV channel - M3 viewing then I would suggest if possi- strength levels have dropped off The Intelsat Organisation advisethat -that will operate from Malmo, ble obtain the 800mm Amstrad dish. Short Wave Magazine, November 1991 47 'gym *e) 9É__117~2<ó Of --'C ~7~ /- **/ o

Paul Essery GW3KFE PO Box 4, Newtown, Powys SY16 1ZZ.

Hello again! 0D50Z,PJ2HB,S0IA,VP8CFM,V51EG, have never had the call OTOKT, but Tome & Principe), OE5KPN, W20GM, The XYORR group duly showed V85GA, YFOCHA, WP4CLZ, ZP6FGS, they have been using OTOOST as a W2IIU, UZ4WWQ and GBOALG; while despite all the problems and, at the 3B8FA and 5H3GM. Turning to 14MHz celebration of 40 years reign by King 21MHz coped with JLIUJG, PZ1AP, time of writing, have recently gone he includes A41JR, A41KB, CE3NKA, Boudwijn, the dates for use of this W1TAK, 4X6YY, YC8ZEA, YC8VYY, QRT after a successful operation. CN8EC, CY9CW I, D68RH, FK8CP, FK8FI, special prefix being March 3 t July 21. KE20P, K10IK, UA6BGB, ZS6AUH, The Hungarian ZA expedition got a HC2HVE, HI8FHD, HI80MA, HKOEFU, In addition, they note a couple of WA2VOS, UT3UA, WOTZL and NM7R/ licence, butthen were 'prevented from HL1UA, HZ1AB, JX3EX, JY3ZH, KP2/ Awards. For the first one, you have to MM. Reception by way of a G5RV or a operating by the Ministry of Defence'; VS6CT, OA4AWW, OA40S, OY2V0, show you heard or worked OROOST or 10m wire antenna, through a switch now we are told that tomorrow, Sep- STODX,TG9AFA,TJ1FN,TU2JL,VK9LA, OTOOST. For the second, you have to box to an a.t.u. Much time is spent tember 16, will see a first contact be- VK9ND, VK9NS, VP2EBN, VU2JJQ, hear or work OROTT and the OROOST/ decoding RTTY and c.w. with various tween ZA1 and the UN station, with XE1ZLW, YN9BS, ZK1TW, ZP5MSC, OTOOST. Send your certified GCR list bits and pieces. bigwigs at each end. That I can accept; 1 Z9A, 3COCW, 3D 2XV, 4S7V K, 6K91 WJ, plus five dollars or 6 IRCs to Club sta- but I go further and hope then to find 7X2AC, 8Q7CO3 9M2CW, 9M8PV and tion OROOST, Plovie Ronny ON6CQ, Mainly CW some true-blue ZA stations, trained 9Y4BU. Perronstraat 6, B8400 Oostende. In and equipped by the group who got as either case the contact can be on any Andrew Marriott of Bath listens mainly far as setting all this up. Enormous List band, but not through a repeater. to c.w. On 18MHz he found OJO/OZ1NG, Mid -afternoon, July 17, there was Thanks for a most interesting letter OHO/DF1NH, W6OWI, WAOCML a station signing ZA1A, on 14.145, lis- A quite enormous list comes from and clarification from the gang at (Colorado), K9SSB/7 (Arizona),VE7SR, tening up between 14.175-14.200, Gerald Bramwell (Swinton) covering Ostend Radio. ZP6CW, 4X/K2XA, while 21MHz gave working Europeans. The beam head- all the bands 1.8-29.7MHz. On each Vince Cutajar (Malta) logged PY2BDN, PY3PR, PR7JB, LZ1CY/MM, ing was about right, but the behaviour band, Gerald splits his listing into: USN YV2BYT, 8Q7CO, VP2EBN, 3COCW, JA7AGK and ZZ2YY. Just to convince of the mainland Europeans on the Canada, USSR, Europe and DX for the ZF2QQ, AP2JZB, STODX, LZ3RR, FR5DX, himself his antenna was OK, Andrew frequency, mainly DLs, and the foul rest. He also makes good use of col- HC2A0., ZL1 BOW and KP2A/KP5 all on also listened to 7MHz s.s.b. for a few language, were of a sort which would oured pens to separate the sideband 24MHz, while 18MHz yielded FM5EP, minutes in the contest, to log 4U1ITU, indicate to any sensible administrator from the f.m. on 28MHz. The end result HFOPOL, CY9CWI (St Paul), 8Q7CO3 UC70, UW2F and 11A. that amateur radio oughtto be banned of all this trouble is a list which I can VK2IP, 9L1LA, ZC4KS, HI8A, PYOFF, D. McLean down in Yeovil notes world-wide! Frankly, I felt ashamed to 'pick the bones out of' at a glance, V31 KX, AP2JZB, V44KAQ, HC2AQ and that with the equinox conditions the be an amateur. Why can't the national despite Gerald having handwriting KP2A/KP5. 28MHz band has opened up, with N. authorities world-wide determine the nearly as spidery as my own! Starting America sometimes as early as noon licences of such oafs? at Top Band, I notice the usual Gs, El, Patience until 22000TC. On 7MHz, Don logged I4ZUW and a couple of European Rus- GW6UW/P (StTudwals Is) and 3COCW; Simplify! sians. 3.5MHz offered a couple of VOs, Mike Davis (Thornton Heath) doesn't 14MHz yielded ED5VDX, EX8V, HBO/ EA8B DW, CT3FF, 7X26 K, 5B4ES, 9Q5TE, get too much time for listening these DK5WN, HL2LPT, JT1CS, KP2/VS6CT, Everthoughtofa home-brew receiver? 7X2DG and PY3JZ. Oddly enough days. However, the point of Mike's KP2A/KP5)Desecheo),RA2FM,SU1ER, Ron Pearce over there in Bungay, though, no Ws are noted on 7MHz,the letter was to enclose his QSL -I have SU1RR, TA1RR, UJ1K, UYOU, VKs, changed from his usual 0-V-1 tool to DX includes CE3PWD, Z21 PO, PY2ELZ, sentit back as requested- from XE1AE, ZL4AN, 3B8FA, 3B8GA, 5H3DC using the SWM Two Transistor Re- PZ1EL, VU2AAG, CX5BW, PJ2MI, VE1RCMP, the call which commemo- and 5Z4FM. 18MHz gave A32DX/P, ceiver designed by G3RJV, and using RA6LEV/JT1,4X1 MJ, 5B4MD, LU7LAQ, rated 50 years of RCMP. Mike sent his AL7I, ED5PAT, ES1 QD/O, H18A,JH7FMJ, parts from Ron's junk box. On 14MHz 4Z4B1, 9K2HA, 7X4AN, KP2/VS6CT, direct card off, along with 2 IRCs and a PZ1EL, STODX, V51BG, VK3E0, s.s.b. he found JA9AA, 4X1 M0, 9K2YA, HL1UA and EUs including C31RA. On copy of the log, and got his QSL back, VP8GAV, WA6CTX/7, Z21CS, ZB2AZ, CX3AAE, YV5KHE, LY2ZO, ES1QD/2, 14MHz I see Ws, VEs, UA3P/GMOCQL, just four days short of two years later! 4U1ITU, 9K2JH and 9M2DM. 21MHz KB2KK, W7NES and SM7DHZ; Ron UL7AAC, 9M2CW, HL9HH, EA9TL, When the card eventually turned up, saw A22AA, BY5RT, BZ4RBV, BZ4RBX, notes that next time he'll report on PY4AH, CN8ST, HK5DER, ZP5CGL, Mike had completely forgotten ever CE4MT, CM6LE, CN8GM, D66RH, 7MHz with the same receiver. CN12DKH, STODX, 5Z4BP, PP7GAG, sending a report; as he says, he hopes ED5VDX, EX8V, HFOPOL(S. Shetlands), Brian Lucas continues inhis KP2NS6CT, HZ1AB,VP8CFM,YV5ANF, his experience will teach newcomer HG20J P, HG32P, HR3JJR, IK2HTW/IA5, training school near London. He has 9K2HA, V51JB, OD5ZZ, VU2JJQ, s.w.l.s the art of patience where QSLs IK8NIM/ID9, JAs, JT10E, P29NCS, now obtained G7JTW and is having T4OPAN, KP4DBR, 7X2DB, VP25EQ, are concerned! RA1AKB, RY8BI, RY8DI, TJ1FN, UAOFF fun on 144MHz, but a degree of no - ZP5CF,4X1 FO,YV5BTS, LU7BQ, EA9PY, On to J. Scott (Glasgow 14), who (Zone 19), UJ8XA, UM9MYY, VE7XN, success on 50MHz. Basically, Brian is LU1KKQ, OA40S, VP8CEN and EA8LD. now has a SSTV program for the VKs, VK9NS, VP2MR, VP25EQ, XYORR, discovering that 50MHz isa band On 28MHz, the f.m. section of the band Amstrad; he has also been in touch VE7XN, VKs, YJ8RN, Y88POL, ZD7DP, where you put a call out on a dead yielded FD1NKA, FD1NEK, GOTZM, with RSGB and BATC for membership ZF2QQ, ZL4AN, 3COCW, 8P9BZ, 8Q7CO3 band with no success, in the end get a DL4MDX, ON4AXV,FD1 PFP and EA8FP. - good! Listening on 7MHz produced 9H8F (Comino Is), 9L3BM, 9M8ST, contact and then find yourself at the Back in July, Brian Lucas' group GB2SRM, PA3F00, PA3DIP, GB300FW 9V1 WW and 9X5SW. 28MHz pulled out sharp end of a pile-up - especially if reported an OTOKT at Ostend Radio and GW3WFU; on 14MHz he found HG20JP, KP2A/KP5, KP2/VS6CT, you have a GM or GW or whatever celebrating Marconi. Now we have a IK3IEQ, VE7BNW, VK3HW, U050 G, LU8XPD (Tierra del Fuego), ZD8WD, prefix for rarity value. Another lesson letter from the Ostend Radio club sta- VK3LAR, VK3WAO, LY9IZZ, HB9CCL, 5B4MF and 9J2HN. Brian learned the hard way occurred tion OROOST. This points out that they OH6JD, YU2CLH, GBONTS, S9RM (Sao when he took a 'handy' to the village Sign -off green to search for distant repeaters; standing in the middle of the cricket Amateur Radio That'sthe lot forthistime. Thanksto all pitch he put a call out and the red light who wrote,andto DX News Sheet, The

indicating flat battery came on. All I Station DX Bulletin, The DX Magazine CQ's

can add is that I regard that as fair 'Contest Calendar' for the input; the punishment for walking on the cricket mistakes of course are mine, hi! For pitch! Seriously,if you go out with BEN nexttime the deadline is November 11 hand-held gear, charge the batteries .rtty and December 2. For the December fully first, and if you can take a spare deadline please post in plenty of time charged battery pack. to allow for the Christmas mailing de- Next,a letter fromPeterBRS36554 lays. of Newcastle -on -Tyne. Peter is now up to 283 countries confirmed on the bands,with ET2A,STODX, KB5LRO/KH9 DF 6 FW on 28MHz and ZK1 BY cards in the lat- QSL card from DF6FW to GB2PW est batch. On 28MHz Peter mentions 14MHz bandRTTY12 November logging AP2JZB, HH2BN, HI80MA, 1981. 48 Short Wave Magazine, November 1991 o/ 6o) WOOILVI o /-/o

Ron Ham, Faraday, Greyfriars, Storrington, West Sussex RH2O 4HE.

Togetstarted in the world of DXTV were seen, plus clock -captions from from which the radiant of the meteor Weather Carl Bowen (Strelley) received Germany, Iceland, Italy and Norway. appearsto come. Therefore one would 'priceless help from Garry Smith' of HS Adverts, athletics, cartoons, dancing, look toward the constellation of Leo The slightly rounded atmospheric Publications in Derby. Carlisequipped gardening, films, musicals, news, for the Leonid meteors. For the benefit pressure readings for the period July with antennas and amplifiers for Bands singing, sport and variety were men- of the computer buffs, Fig.13, was 26 to August 25, Fig. 14 were taken at

I & Ill,a D100 converter and a tioned among the programmes they drawn, with the mouse and the noon and midnightfrom the barograph monochrome TV receiver. Between saw. Microsoft Windows'paint' program on installed at my home in Sussex. July 26 and August 18, he received myAmstrad PC2286/40 and reproduced Throughoutthis period, I only recorded picturesfrom Czechoslovakia Meteor Trail on a Commodore MPS1230 printer. 0.49in of rain, the weather has obviously (Ceskosolovenska Televize), Italy (RAI- Reflection been dry, sunny and warm with tem- Uno), Norway, Spain (TVE1), peratures in the plus 70/80°F region. Switzerland (SRG) and the USSR (TSS) On August 8, just after the expected PictureArchives in Band I and Canal+ from France in peak of the Aquarids meteor shower, Tropospheric Band Ill. Like many readers, Carl has Simon Hamer identified 'pings' of sig- Bob Brooks, has been TVDXing for a found that RAI and TVE have been nals, in Band II ),from Denmark (DR) on long time and he kindly sent some of In Band Ill, Simon Hamer received common catches during the 1991 Ch. E10, Finland (YLE) and Norway the early pictures that he received, via pictures from Denmark and Norway Sporadic -E season. (NRK) on Ch. E5 and Sweden (SVT) on Sporadic -E openings in Band I, for you on August 28 and Belgium, France, Ch. E8. Readers interested inthis mode all to see. His DX in 1983 included test - Germany, Holland and Ireland on of propagation should leave their re- cards from Austria Fig. 1, the Norwe- September 4. John Woodcock logged ceivers set precisely on the vision gian regional Steigen Fig. 2 and a pictures from France during the after- frequency of such a channel and watch newscasterfromthe USSR Fig.3.There noons of August 12, 25, 27, 31, Sep- There was a period of Sporadic -E al- for sudden burst of picture, lasting just are three points of interest here, es- tember 4 and 6.I found these French most daily throughout August when a few seconds asthe signal isdeflected pecially for newcomers. First, the signals strong while parked near Bob Brooks (Great Sutton), David by the decaying ionisation created by Austrian signal is on Ch. E2A which is Goodwood onthe 19th using a JVC3060 Glenday (Arbroath), Andrew Jackson a meteor particles burning up in the the same as Ch. R1 (49.75MHz), there- receiver with its own rod antenna in- (Birkenhead), Simon Hamer (New earth's atmosphere. Of course, random fore it is not unusual to find the likes of side my car. Radnor) and John Woodcock, be- meteors are entering our atmosphere Figs. 1 and 3fighting for predominance After seeing interference, on Au- tween them, identified pictures from all the time, but periodically, the earth, on your screen during a big opening. gust 30, on his BBC and IBA pictures 20 countries ranging from the Medi- onitsorbitalpath around the Second, note the digital clock on Fig.2, from the Emley Moor Transmitter, terranean to Scandinavia in Band I (48 sun,encountersgreatswarmsofthese this is usually one hour ahead of us and Andrew Lomas (Barnsley) decided to to68MHz).Theirlogs contained reports particles know as showers, most of thirdly, the Russian news caption investigate the cause. With a his son's of seeing logos, programmes and test - which are indicated by their numbers HOBOCTN in Fig. 3.The latter may also Ferguson monochrome portable and a cards from Albania (RTSH), Austria in Fig. 13. read BPEMR. In July 1984 he saw a small set -top antenna, to his great (ORF), Czechoslovakia (CST & ISR-P), Coming soon are the Taurids, news programme from Spain's TVE surprise he was soon receiving pic- Denmark (DR Danmark), Finland (YLE), Leonids, Geminids and Ursids when Fig. 4 about motorway traffic and in turesfromthe continent. Between 2132 France (TDF), Germany (ARD), Greece there is another chance to look for 1985 he saw the opening programme on the 30th and 0041 on the 31st, he (ETP), Hungary (MTV), Iceland (RUV), reflected pictures, or, if the sky is clear sequence from Portugal (RTP) Fig. 5 received u.h.f. transmissions from Italy (RAI Uno), Norway (NRK), Poland and free from moonlight go outside and one of the Spanish news readers Anglia TV, Belgium)BRTTV2), Germany (TVP), Portugal (RTP), Romania (TVR), and take a good look, especially if you Fig. 6. (ARD1, N3, NRD1, RTL, SAT1 & ZDF) Spain (TVE), Sweden (SVT), Switzer- live in a locality without street lights. Lt. Col. Rana Roy received a strong and Holland (PTT NED3 and Lopik). In land (+PTT), the USSR (TSS) and Yu- Burning meteors and fireballs can be a caption from Bhatinda Fig.7 athis home addition to American films, news and goslavia (JRT). The Norwegian re- fantastic and colourful sight and do in Meerut, India, on Ch. E12 in Band Ill football, Andrew saw the captions gional test -cards enscribed Bagn, keep in mind that the showers are during a tropospheric opening on June Berlin Mitte, Bericht aus Bonn, Gamlem, Hemnes, Melhus and Steigen named after the constellation of stars 11. Nordtext and Taggeschau (news).

Fig. 1: Austria. Fig. 2: Steigen. Fig. 3: USSR.

Fig.4: TVE Spain. Fig. 5: RTP Portugal. Fig. 6: Spain. Short Wave Magazine, November 1991 49 CrocuD~d-zu-~

METEOR SHOWER PEAKS 1991 1-Quadrantids, Jan_ 4; 2-Lyrids, Apr.22; 3-Scorpiids, Apr.28 and May_l3; 4-Cygnids, July_21 and Aug_21; 5 -Perseids, Aug_13; 6-Orionids, Oct_22; 7-laurids, Nou. 4; 8-Leonids, Nou.18; 9-Ceminids, Dec.14 and 18-Ursids, Dec_23.

A

Another good haul of u.h.f. DX came 1300, he logged pictures from Belgium Nar_E from Andrew Jackson who received (BRT1 & 2), Denmark (TV2), Germany ---"B pictures from Germany(ARD/ZDF) and (ARD1, NDR3, RTL+, SAT1 and ZDF), (Jun. Holland (PTT NED1 &3) on the 20th and Holland (NED1, 2 & 3) and Sweden on the 30/31st he logged pictures from (SVT2) spread throughthe u.h.f. bands. `--- U.}¡ _ Denmark, France and Holland in Band By 1500, Dave was high on Cairn '0 4.aR-----"-ir' Ill, German signals from their u.h.f. Mounth with a 5in Yoko portable and, M andV = the orbits of the planets Mercury and Venus stations in Aurich Fig.8, Bremerhaven/ with its own rod antenna, he saw A andB= areas of the moon and earth illuminated by Cuxhaven Fig. 9, Flensburg, Hamburg, Norwegians in Band Ill and Dutch in sunlight Hanover, Heide/Eiderstedt, Lubeck, the u.h.f. band. Nebull, Neumunster/Schleswig and Realising conditions were good, Fig. 13. Wurzberg and Holland from Goes, Lopik George Garden (Edinburghvisitedthis Fig.10,Markelo,Smildeand same high spot on the 2nd and his pletely opened up with a fair number of scan television captions between Wieringermeer. Similar conditions efforts were 'very amply rewarded' continental stationsfightingforspace," 14.227 and 14.235MHz from stations in prevailed on the 3rd and 4th of Sep- with many stations that he had not wrote George, adding that there was Germany Fig. 11 and the USSR Fig. 12, tember when he again received v.h.f. seen atthat location before. In addition another Dutch programme just above both looking for contacts with others pictures from Belgium (BRT TV1 & to test -cards from Belgium (BRT TV2) BRT on Ch. 46 showing cartoons, lawn using a similar mode. John has joined RTBF1) and France (Canal+) and from and Holland (PTT-NED3), George re- tennis,Thunderbirdsandworld news. the British Amateur Television Club France (Antenne 2 and TF1) Holland ceived a 'strong colour, grain free' and is delighted with their magazine and Germany in Bands IV and V. His BBC2 signal from the Caldbeck, Nr $$N CO -TV.He has sent for back -issues tropospheric DX came closer home on Ca rlisle,transmitter on Ch.E34 and ITV containing articles about s.s.t.v. and the 6th, 7th, 8th and 9th when he logged 'TYNE TEES' from Bilsdale and Pontop During the month priorto September 7, found it an 'eye opener'thatthere is 'so signals from Ireland (RTE1 and 2). Pike. "Around 1630 the band com- John Scott (Glasgow) received slow much scope in the amateur TV field'. Although on holiday, on the 31st, at a camp site at the foot of a glen about 1.5km south of Banchory, a poor lo- Fig. 14. July 91 August 91 cation for DX, David Glenday had with 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 1213 1415 16 171819 20 2122 23 24 25 NMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNM him a Band Illdipole and his 14in. mb 30.6 1035 Grundig portable. He was 'stunned' to 30.5 1032 30.4 1029 receivepictures fromHolland 30.3 1026 302 1022- (Wieringermeer) of NED. 1, 2 and 3 on 30.1 1019- 30.0 Chs. E39, 45 and 42 and remarked, "the 29.9 1012 29.8 1009 only u.h.f. signals coming in apartfrom 29.7 1005 29.6 1002 Durris!" He then checked Band Ill and 295 998 29.4 995 found Norwegian (NRK) stations on 29.3 991 Chs. E5, 6, 7, 8, 9 and 11. Conditions 292988 29.1 984 utrtrMOW 29.0 981 íli were still good when Dave returned to 28.9977 iliiitll 111~1881 Arbroath on September 3 and around

Fig.1: Bhatinda. Fig. 8: Aurich. Fig. 9: Bremerhaven/Cuxhaven.

!l.'- f s

Fig.10: Lopik. Fig. 11: SSTV from Germany. Fig. 12: SSTV from USSR. 50 Short Wave Magazine, November 1991

Godfrey Manning G4GLM c/o The Godfrey Manning Aircraft Museum, 63 The Drive, Edgware, Middlesex HA8 8PS.

At the PFA Rally 1991: A.61 Terrier 1. Christine Mlynek

Strictlyspeaking,the airbands are prefers this voice to 'mid -Atlantic' syn- mostly occupied by communications thesised speech, an opinion I share. transmissions in which one station Back to the Fw 200 (May and Au- addresses a message to another gust). An anonymous reader from specified station. An air traffic con- Brussels kindly sent details of Wings troller, for example, will give an in- of the Luftwaffe by Capt. Eric Brown, struction to one particular aircraft out CBE, DSC, AFC, RN, edited by William of the many that are on frequency at Green and Gordon Swanborough and that moment. Sometimes abrief published by Macdonald and Jane's broadcast is made, such as the an- (Pauton House, 8 Shepherdess Walk, nouncement of a change in QNH. London N17LW). Pages7to 18 describe Three types of pre-recorded con- the military career of this aircraft - in tinuous broadcasts are also to be found English! Paul Hilton (Newbury) will on certain frequencies. The VOLMET doubtless be interested. announces the actual weather, and sometimes important forecast, at a Frequency and Operational series of aerodromes. This is a cen- when USA is on standard time. Leslie destroyed by a fire during refuelling News trally -provided service. Next comes last flew the DC -9 for SAS; good to and its successor, Aries Ill, was of the the automatic terminal information hear from you again. same type (serial RE367). Nowthat a new relay is functioning on service (a.t.i.s.). This information is Surprising how one past event 135.525MHz, reception of Shanwick broadcast by an aerodrome and only Airways prompts so much knowledge and en- Clearance Delivery should be improved

tells you about that particular aero- thusiasm from readers. R. John Taylor in the south-east. I don't know the drome. As well as weather, the op- What frequencies are contacted by G30HV (Crowborough) was stationed precise location of this new relay but

erational runway is given along with eastbound aircraft oncethey complete at No. 1 Navigation School RAF its purpose is to enable aircraft de- any problems such as unserviceable their crossing of the north Atlantic? Shawbury at the time of the Aries parting the London terminals to make navigation aids. Sometimes a.t.i.s. is John Fitzpatrick(Doncaster) is asking. flights. John took a three-year com- contact with Shanwick as early in the broadcastvia a v.o.r. beacon (example: The simple answer is that the flights mission with the Fleet Air Arm before flight as possible. Jersey 112.2MHz via JSY beacon), join the airways system controlled by returning to the RAF. He remembers Peter Nicholson asks about Scot- which is why it's important to make either the Shannon or Scottish air that Aries carried flight crew, an en- tish FIR frequencies. Flight information sure that 108-117.95MHz is included traffic control centres. Exactly which gine fitter, a rigger and a radio me- service (no radar) is available on 124.5, when choosing an airband receiver. I of the manyairwaysdependsonwhere chanic. Their achievement won each 124.9, 131.3 and 133.2MHz. Border In- hope this subtle difference between the actual north Atlantic track enters of them the Air Force Cross. formation is on 134.85MHz. To deter- VOLMET and a.t.i.s. will help clarify the Shannon or Scottish airspace. The Peter Finn (Milford Haven) also minethe exactgeographical coverage matters for Sid Morris (West Mid- best way to follow these is to find the recognised Aries. His brother, Basil, of each frequency it is necessary to lands). route on an upper airways chart and was the flight engineer on many of the refer to the appropriate chart such as The remaining broadcast is that of then look up the control frequency in sorties and found Iceland a pleasant the half -million topo sheet 2150ABCD the day's north Atlantic organisedtrack the airways section of the appropriate change after the confines of the p.o.w. (current edition is 13). Of the above, system (133.8MHz). supplement. Aerad charts are as good camp he entered, having been shot Border Information is probably the as any, but the full choice of primary down in a Stirling. region nearest to you, Peter. Information Sources suppliers was given in October. As a More modern, also mentioned in In answer to John Ware (Redhill) rough guide, try 124.05,126.85,134.775 September, is N112WA. This DC -10-30 and Simon Utili individual airfields, such Charts and other publications (pre- and 135.85MHzfortracks entering over was noted in service with World Air- as Leavesden, don't usually have relays sumably recently out-of-date?) were Scotland and 124.7,127.5,131.15,132.15 ways again,thistime by Norman Locke but are confinedtotransmitterslocated found on sale very cheaply at the RAF and 135.6MHz for flights arriving in (Peterborough). According to Peter on site. As mentioned in my reply to Sid Finningley airshow by Simon Utili Shannon airspace. Nicholson (Huddersfield) this aircraft Morris (abovelthe occasional a.t.i.s. is (London). Simon's in the Royal Ob- was leased to Lufthansa recently as broadcast from a nearbyv.o.r. beacon server Corps and was hoping for some Follow -Ups well as Garuda. One Saturday at local instead of, or as well as, from the air- air experience flights. As things are mid -day Norman also saw a B.747 of field itself. The v.o.r. will be on a fre- now more difficult financially, these Lancaster Aries featured in Septem- Northwest on its way to the USA at quency below 118MHz whereas the might not take place - but if you are ber.I was right that someone would around FL70; "A lovely sight in the direct transmission from the airfield lucky, and I hope you are, then write know its serial. Keith Seddon G000U summer blue sky." Wish I was there to will be on 118MHz or above (example: and tell us what it was like. (Stockport) isthatsomeone, PD328was see it, too. Biggin Hill departure information, Elsewhere you'll see my review of the serial. The first British aircraft to Shannon VOLMET (September) is 121.875MHz). Conversely, VOLMET The Aviation Enthusiast's Handbook circumnavigate the world, PD328 was read by the same English voice as the broadcasts and London and Scottish by Kevin Fox, which I recommend. Sam scrapped in January 1947 to be re- UK v.h.f. broadcasts are. Nicholas Centre communi-

Harris (Billericay) bought this book. placed by Aries II, Lincoln B2 serial Austin (Leigh -on -Sea) is, I believe, a cations are distributed by relays Please note that I am unable to reply RE264. One year later this Lincoln was professional meteorologist. Nicholas throughout the country. directly to readers, but I always try to answer queries in this column. Bob Ramshaw G3RLD (Northamp- ton) hoped to start a radio amateurs' aeronautical net (see September is- sue).I am reminded by Capt. Leslie Greville-Smith G4SUJ (Wolverhamp- ton) about the International Associa- tion of Airline Hams (PO Box 82412, Atlanta, Georgia, 30354-0412, USA. Some enlightened countries allow amateur aeronautical mobile opera- tion, so a listen on the Association's net frequencies might yield some sur- prises. Sunday and Wednesday it's on 14.28 and on Thursday 21.38MHz (both ±QRM). During USA daylight saving, the netruns 1400-1700Zand 1500-1800Z At the PFA Rally 1991: An immaculate De Havilland Moth. Christine MI ynek

Short Wave Magazine, November 1991 51 ¡/ //////`Vl T/[,/UU`

Alan Gardener PO Box 1000, Eastleigh, Hants S05 5HB.

News reaches me of a new hand- number of crimes involving the use of held scanner from AOR, spotted in scanning receivers we may all suffer Japan. Few details are currently due to the misguided actions of a few known, but it is likely to be called the individuals. This maytake the form of a AR1500 and will include s.s.b. recep- more stringent enforcement of existing tion. This is achieved bythe addition of laws or a clamp -down on the sale and a b.f.o. circuit, which will permit fine ownership of scanners - which would tuning of signals lying between the be unlikely to have much of an effect 5kHz receiver tuning steps. Physically bearing in mind the number of receiv- it looks like a slightly stretched version ers already in circulation. of the existing AR900 and is anticipated One reader thought it strange that to appear in this country early next it was not an offence to sell scanning year. receivers. I can't quite see the logic in this argument, as there are plenty of Scanning & Crime perfectly legitimate reasons for own- ing one. However, I'm sure that if the HP -100/200. My comments relating to the law and authorities had foreseen the current scanning receivers over the past few level of ownership a few years ago months has provoked several readers they may well have made an effort to AR -1000/2000. into writing, particularly regarding the prevent them from being sold. In the monitoring of police communications. majority of cases, where scanners used forthe encription process can be events this may well be sooner than The illegal use of scanners has fea- have been recovered from the scenes changed several times a second. So, expected. tured in several national newspaper of crimes, they have been cheap 10 or even if someone was lucky enough to If you have any thoughts on this reports of the current (at the time of 20 channel models either bought or find the right combination of digits, it subject or any related topic why not writing) spate of joyriding, inner city stolen from a well-known high street would only be valid for a fraction of a drop me a line. riots and public order offences. Itwould store. This doesn't imply a great deal of second. This is referred to as a rolling appear that, in at least one case, the sophistication on the part of the per- code encription system and is the AOR Modifications joyriders have been informed of police sons involved, but rememberthat even method used in most high security movements by people equipped with a simple scanner will permit monitor- military equipment. I have received a lot of feedback re- scanners and CB radios. In one in- ing of most current communication However,the disadvantage of most garding the reprograming of the stance, the home of a person who systems. Indeed, it may be that pro- digital encription systems is that the AR1000/2000 series hand-helds after I called the police was attacked after fessional gangs of criminals using more receiver has to remain synchronised included it in the Sept column. It would their address had been given over the specialised equipment have yet to be to the transmitter in some way, so that seem that a few gremlins got into the air. caught. the decoder knows which code is be- printing process which caused a Many readers have commented More than one reader has asked why ing used and at what point it is in the headache for one or two readers. that making it illegal to listen to the the police don't scramble their trans- mathematical sequence.This is usually The procedure should also work police is unlikelyto have any any effect missions. The simple answer to this is achieved by transmitting some form of for the Fairmate HP100/200 series on people using scanners for criminal money. The cheapest type of scram- synchronising signal at the start of scanners, although I have not been activities. One reader commented on blers use analogue techniques to transmissions and at regular intervals able to try it personally. Note that the the fact that until recently (when the modify speech patterns in such a way during them. This works well with reset procedure will erase all of the emergency services had to change as to make them difficult to unscram- strong signals, but when conditions memories so you will have to repro- frequencies) it had been possible to ble without specialised equipment. are less than perfect, e.g. when using gram the contents of any memory listen to the majority of police com- hand-held transceivers inside moving channels you may have used in addi- munications just using a domestic ra- Scrambling Techniques vehicles, problems can arise. If the tion to the search band frequency dio. He wondered why it seemed as if transmission becomes broken, the limits. the authorities had only just realised The two most common methods of receiver may lose synchronisation with As far as I am aware, it is not pos- that members of the public could listen analogue scrambling are frequency the transmitter, in which case all of the sible to reprogram any other scanning to the emergency services, when it shifting and inversion or time shifting transmission up to the next synchro- receivers that have separate fre- had been possible more thanten years and rotation. Because of the inbuilt nisation burst is lost. Clearlythis is not quency bands to give continuous ago without requiring specialised resilience of human speech, which desirable when an undercover op- coverage. Itmay prove possibletotrick equipment. enables itto be understood even when eration is in progress as it could mean the scanner into displaying a frequency Another reader thought that moni- severely distorted, it is difficult to ef- losing vital information. The better outside one of the specified ranges, toring police communications was a fectively disguise the content of designs manage to minimise such butitisunlikelyto containthe additional relatively harmless pastime and that it transmissions in this way. Given problems by the use of clever math- circuits required before it can actually was a good thing to have an appre- enough time and effort, both of these ematical algorithms which embed receive signals. ciation of the difficulties faced by the simple techniques can be synchronising information within the The main problem most readers police whilst carrying out their duties. descrambled. In order to provide more encripted data but this costs money - seemed to have was associated with This may true when it doesn't involve secure communications, digital tech- which makes it a major problem for identifying the correct pins on the mi- any criminal intent, but the incident I niques have to be employed. most police forces. croprocessor chip. In orderto correctly mentioned previously occurred as a The speech waveform is initially When choosing encription equip- locate pin 1, turn the scanner so that dire ct resultofthe misuse of a scanning converted into a series of logical lev- ment, it is important to select the best the top of the case with the I.c.d. is receiver. The story doesn't end there, els,which can then be mathematically system available. Simple, but cheap, pointing to the left. Pin 1 is now at the once the newspapers mentioned the manipulated to produce an encripted analogue scrambling will only give a top left hand corner of the i.c. (marked fact that police radio channels were serial data stream suitable for trans- limited amount of security, which with a dot moulded into the plastics). being monitored, members of the public mission. This method of encription is would discourage casual listening but The rest of the procedure should now became reluctant to give their own very secure, as any resemblance to would not prevent determined indi- be correct. If you don't want to risk details when reporting incidents, as the original speech waveform is re- viduals from monitoring. This is par- soldering to the i.c. pins directly you they didn't wish to have them passed moved during the first stage of con- ticularly important as technology has can use an alternative method which on over the radio. version. The subsequent mathematical a habit of catching up with even the just involves temporarily soldering a I would hope that the majority of encription process can provide millions most sophisticated systems in time. I short wire link between two points on people reading this column are re- of different permutations of the basic would imagine that encripted equip- the p.c.b. as shown in Fig.1(shown on spectable law abiding citizens who digital waveform, making decoding mentwill be introduced gradually over the next page). If you do use this use their scanners in a responsible without the correct equipment ex- the next few years as existing equip- method, I would suggestthatyou leave manner, but it would seem that unless tremely difficult. In order to make this ment is replaced or as additional funds two insulated wire 'tails' connected to a solution is found to the increasing even harder,the mathematicalformula are made available. Given recent the points shown so that in future you 52 Short Wave Magazine, November 1991 Fig. 1. A wire link can be used for reset s c álr)02»1r ,ff on the AR2000 (applicable to the AR1000 as well)

LCD DLC5066P can perform a reset (should it be nec- line 6. This is correct, as the receiver essary) without having to completely automatically assumes itto be present dismantle the receiver. when more than a certain number of It would also seem that more than digits are entered. one type of microprocessor has been My thanks to all the readers who used, so you could find that part of the passed on information on this subject. o procedure for extending the coverage Mike Totham writes from Chelten- between 600 and 800MHzdoesn'twork. ham with a possible solution to Julian IC400 If you find this to be the case you may Long's computer problem, which I ppD 75P308GF have to settle for it and substitute line asked for help with in the September 5inthe original procedure for5[PROG] column. The problem Julian had was 297 [LIMIT] 600 [SEARCH] [>] 251.575 in persuading his BBC B computer to [ENTER] produce a data format of8data bits, no ¡.741D404 For the AR2000 a modified proce- parity and 2 stop bits from its comms C411 44_1272 v )n -IF-10N dure may be required.This is as follows. port in order to get it to talk to his :-Zir-f--1 D403 ./0. As before the command keys are AR3000 receiver. Mike gives the fol- C 2 0 shown in brackets and the down arrow lowing example: -4ióm7 t01-2.41±_)272!±-R1D402 key as [>]. tTk vS-Vj272;SA 4!0_ [BANK] 1[PROG] 0.5 [LIMIT] 49.995 100A%=&9C [SEARCH] 556.325 [ENTER] 110Y%=&E3 2 [PROG] 50 [LIMIT] 107.995 [SEARCH] 120 X% = &10 !¡ti.12D74201 556.325 [ENTER] 130 R = USRI&FFF4) f= 3 [PROG] 108 [LIMIT] 169.995 [SEARCH] +4- [5405 556.325 [ENTER] The line numbers are just for clarity, 272 4 [PROG] 170 [LIMIT] 286.995 [SEARCH] A% will select OSBYTE call &9C or 556.325 [ENTER] decimal 156(i.e. *FX 156(,Y%will clear 5[PROG]287[LIMIT]599.995]SEARCHI onlythe existing word select bits in the 249.125 [ENTER] 6850 ACIA control word, X% sets the 6[PROG]800[LIMIT] 1109995[>]249.125 word select bits to the required 8 data [ENTER] bits, no parity and 2 stop bits. 7 [PROG] 1110 [LIMIT] 1300 [>] 556.325 Most of this information was de- forthe BBC. Mythanksto him for pass- you take the opportunity to try and win

[ENTER] rived from The Advanced User Guide ing on the information which I hope the AR2000 hand-held scanner on of- 8 [PROG] 600 [LIMIT] 799.995 [SEARCH] for the BBC Micro by Bray, Dickens and will be of value. Let me know how you fer in the free competition. Until next 58.075 [ENTER] Holmes and published by the Cam- get on Julian. month - A couple of readers have com- bridge Microcomputer Centre in 1983, Well that's just about it this time Good Listening. mented on the apparent absence of a which Mike recommends if you are around. I hope that you enjoy reading decimal point in the figure 1109995 in considering writing serious programs the WhatScannersupplementandthat 7 //llr/ o-7 /rzp/

+51

I haven't yet come across any allo- Gatwick, Manchester, Newcastle, cations in the new 136-137MHz sub - Ronaldsway, Teeside. band which is now available but I be- lieve that this segmentwould be avail- Receiver able for airways controlif the need Problems were to arise. Few USAF aircraft are fitted with In August, Des Reed (Melton) was SelCal but VC -25 No. 29000 operates having problems understanding the as Air Force Two (the Vice -President's instructions for connecting power to transport) and its SelCal is AE -LP. Re- the AR1000. A helpful hint from R. member to add this to your copy of Raeburn (Elgin) suggests that the High in the Sky. Staying withthe USAF, supplied lead can be connected to a their Thunderbirds displayteam talkto car's power system (presumably via each other on 141.85MHz a.m. Their the cigarette lighter socket) and bat- support aircraft is a C-141 Starlifter tery charging plus receiver operation which rather puts our Red Arrows' is presumably then possible. Mains Hercules in the shade. Thanks Paul At the PFA Rally 1991, the author admiring the characteristic Jodel supply, again for reception plus Hilton for this USAF news. wing shape. Christine Mlynek. charging, can be obtained from the How aboutthe Soviet displayteam? JIM PSU 101 which is advertised in The Red Knights were due to be at the 362.3MHz. Tower: 122.1, 269MHz. Di- Davidstow Moor, Warlingham; covers this Magazine. Make sure you specify RAF Leuchars display this year - and rector surveillance radar: 123.3, Amsterdam, Brussels, Dublin, Glas- which receiver your PSU 101 is to be so was Alastair Turnbull 288.3MHz.PAR:318.1primary, gow, Gatwick, Heathrow, Stansted, used with. (Helensburgh). Most displays are 252.3MHz. Manchester, Charles de Gaulle. South Until next month, I thank you for all controlled on the airfield v.h.f. fre- Just likeB.D.Berman (Burton -on - (128.6MHz): DavidstowMoor,Ventnor, your interesting letters. quency but the military sometimes use Trent) I can't understand the choice of Warlingham; covers Birmingham, The next deadline (for topical in- u.h.f. where required. Do the Red which aerodrome is reported on which Bournemouth, Bristol, Cardiff, Jersey, formation) is November 11. All corre- Knights have their own frequency to of the three London VOLMETs. Ias- Luton, Norwich, Southampton, South- spondence to 'Airband,' c/o The talk to each other (presumably in sumethe arrangement satisfies users' end. North (126.6MHz): Great Dun Fell; Godfrey Manning Aircraft Museum, 63 Russian) during display? Leuchars requirements in some way. The relays covers Blackpool, East Midlands, The Drive, Edgware, Middlesex, HA8 Approach: 126.5 primary, 257.7, are as follows. Main (135.375MHz): Leeds and Bradford, Liverpool, 8PS. Short Wave Magazine, November 1991 53 Mike Richards G4WNC 200 Christchurch Road, Ringwood, Hants BH24 3AS.

Ithought I'd better start this month The second route I've shown goes via severe smudging of FAX signals. I've have noticed that most of the large with a warning that I might be a little the ionosphere and is called the sky shown a typical example in Fig. 3. The Meteorological authoritiestransmitthe late with my replies overthe next month wave. effect is very similar to the ghosting same charts on a number of frequen- or two. This is all due to a new arrival The next point we need to consider caused bya poorly aligned TV antenna. cies spread throughout the h.f. bands. that's expected at the end of Novem- is the effect that multi -path has on the The TV ghosting is also caused by These frequencies have been carefully ber. No doubt chaos will reign for a received signal. To fully appreciate multi -path propagation, but over much chosen to ensurethattheir signals can period thereafter. (Not only at 200 this aspect, we need to return to some shorter distances. Another important be received through a wide range of Christchurch Road! - Editor.)So please basic theory relating to the speed of a point to appreciate is that multi -path propagation conditions. The trick, accept my apologies in advance! radio signal. For the purpose of these reflections can be caused by all man- therefore, is to try a number of differ- calculations, we can use the speed in ner of objects, and not just the iono- ent frequencies and pick the one that Readers' Letters free space which is 300 000km/second sphere, typical examples being large produces the best results. You will find - the real speed is actually slightly buildings and hills. When receiving DX that optimum frequency changes ac- MrJ. Howe from Horsham in Sussex is slower due the effects of the earth's signals you may also receive signals cording to both the season and the an amateur astronomer and would like atmosphere. If we now calculate the by both the long and short path. I've time of day. to receive satellite images. There are time taken for the two signals to travel shown an example of this in Fig. 2. As If you'd like a practical demonstra- two basic routes to achieving this: from transmitter, we can work out the you can see, the time difference in this tion try tuning -in to Bracknell Meteo 1: h.f FAX or difference. My calculations show the case is likely to be significant, so you on the following frequencies: 2.6185, 2: v.h.f./u.h.f. satellite reception. ground wave as 0.67ms and the sky would probablyseea very distinct echo 4.782, 9.203, 14.436 and 18.261MHz. The h.f. FAX option isthe area dealt wave as 1.2ms. The important point, on a FAX chart. Remember, the results will vary ac- with via this column and probably the however, is the difference between So what, if anything, can be done to cording to the time of day. The format most popular signal is the Meteosat the two, 0.53ms in this case. Now, this reduce the effects of multi -path? With used bythis station is 120r.p.m. with an images that are re -broadcast from may seem very small, but it can have a the TV signal the solution is usually to IOC of 576. Incidentally, it's multi -path Offenbach Meteo on 134.2kHz. To re- significant effect on some forms of position the antenna to null -out the propagation that is largely due to the ceive these, you need a receiver and utility signal. Probably the most se- unwanted multi -path signal.Thisisonly fading experienced by many broadcast antenna that will operate down to verely affected are FAXsignals,where possible because there is normally only signals. 130kHz plus a FAX decoder. If the sat- this delay produces a form of echo that a couple of signals to choose between. If you have any utility related sub- ellite images are the main interest, results in every vertical line having a On h.f., the problem is rather more jects that you'd like to me to explain, then it's important to ensure that the second line just to the right. This ob- complex as there are likely to be many please drop me a line and I'll do my decoding system is capable of dis- viously destroys some of the fine detail different multi -path signals coming best to help. playing a grey scale. If you have an in the chart. It's also important to from different directions. This isfurther IBM compatible computer, there are realise that, in the real world, signals compounded because few listeners Schedules several very good packages available are rarely subject to one multi -path have the space to be able to create at around the £100.00 mark. If you're route and have very complex interfer- steerable h.f. antenna systems. How- Mr W. Willes from Dorchester has starting from scratch andwantto avoid ence patterns. ever, allis not lost as there is one written this month with the latest computers, you should look at some of These complex patterns produce solution that is available to all. You will schedule for the Yugoslavian news the self contained decoders such as agency TANJUG. In view of the trou- those from Universal. I'd strongly rec- bled political situation, transmissions ommend that anyone considering this from this station are particularly im- route should visit one of the specialist portant. TANJUG has also recently dealers and spend some time making changed its transmission process so sure that it does meet your require- they're particularly keen to receive ments. QSLs to confirm that their coverage If you choosethev.h.f./u.h.f. option, has not been compromised. The you can receive satellite images direct transmissions described here are all from the satellite itself. For more in- 50 baud RTTY using a shift of 400Hz. formation on this keep an eye on English Service Lawrence Harris"Info In Orbit' column. 11.604MHz (YZJ2), 0400-17000TC, John Dimond of Milnerton, South SE Asia Africa has recently moved and taken 13.44MHz (YZJ5), 0400-17000TC, the opportunity to set-up a new utility Far East station. The main change is the inclu- 12.2125MHz (YZ071,0400-17000TC, sion of an IBM PC and the very powerful Europe, Africa, Mid. East. Code -3 decoding package. In answer Fig. 1: Multi -path propagation. 7.658MHz (YZD), 0400-17000TC, to my recent query about DYN trans- Europe, Africa. missions, John reports regular recep- 7.996M Hz (YZD91,1700-04000TC, SE tion of press pictures on 9.2399MHz. Asia. The prime time for pictures seems to 7.806MHz (YZD7), 1700-04000TC, be between 1900 and 1945UTC. Far East. 5.24MHz (40C2), 1700-04000TC, Multi -path Europe, Africa, Mid East. 7.658MHz (YZD), Europe, Africa. Overthe months I have made reference Sundays 0900-22000TC, Monday to the problems caused by multi -path from 09000TC. propagation but haven't provided a full French Service explanation. So here's my chance to 15.705MHz (YZJ6), 1100-14000TC, put that right. W. Africa. Let's start by explaining what is 10.278MHz (YZA9), 1700-18000TC, meant by the term multi -path propa- W. Africa. gation. Quite simply, it is used to de- 7.592MHz, (YZD6), 1900 -close- scribe the case where a signal travels down, W. Africa. from the transmitter to the receiver Sunday 1300-2000UTC using more than one route. I've shown Spanish Service an example of this in Fig. 1. From this, 19.8655MHz (YZJ4),1600-18000TC, you can see that one route is the direct S. America. p ath th at is known a s the ground wave. Not Sundays. 54 Short Wave Magazine, November 1991 Communications Centre (Photo Acoustics Ltd.) A TWO-WAY RADIO AMATEUR RADIO AUDIO VISUAL SALES & SERVICE 58 High Street, Newport Pagnell, Bucks MK16 8AQ.Tel: (0908) 610625 FAX: (0908) 216373

Itis an acknowledged fact that AOR are the foremost manufacturer of VHF/UHF monitoring receivers in the world. AR -3000 - The Ultimate Receiver In the AR -3000, even AOR have excelled themselves, because they have produced what is without doubt the ultimate receiver for wide band monitoring use. Designed for the professional market, the AOR-3000 is nevertheless affordable by the listening enthusiast, and the specification is enough to make any keen listener want this astounding receiver. Brief details:-Imagine a frequency coverage from 100kHz to 2036MHz: that's from below Radio 4 on the long wave to beyond satellites on 1.7GHz: and there are no gaps in the tuning range. Any frequency within this astounding range is yours to use as you wish Imagine all mode facilities, including AM, FM (communications(, FM (broadcast), Upper Sideband, Lower Sideband, and even CW, yours to command with the AR -3000 Imagine tuning in 50Hz steps for accuracy on SSB/CW, with any step available at your choice from 50Hz to 100kHz, selectable in 50Hz increments. For really high speed tuning you can even increase all the steps by a factor of 10 by a touch of the main tuning knob Imagine 400 memory channels in 4 banks of 100, with each bank having its own priority channel and each bank having its own programmable search system Imagine high speed scanning at 20 channels per second, each memory channel having frequency, mode and RF attenuator setting stored safely in it Imagine having a real time clock for accurate logging Imagine having a built-in R5-232 computer interface for total control by a personal computer Imagine having all this with outstanding performance which AOR built in to their famous AR -2002, but have now AR -3000 £765 p&p £5.00 improved on for the AR -3000.

Software for Computer Control of ACEPAK-3AR -3000 £119.95 p&p £3.00

IC -R72 Communications Receiver HF-225

HF 2 Price Carr. HF general coverage Receiver, 30kHz to 30MHz £429.00 £12.00 (The HF-225 has been voted "Receiver of the Year" by World Radio TV Handbook, against all other manufacturers products). Options: D-225 Synchronous AM and FM detector £40.40£2.00 K-225 Keypad for direct frequency entry £40.40£2.00 B-225 Internal NiCad battery pack £50.60£3.50 ICOM's communications receivers have a reputation for reliability W-225 Active whip aerial £19.95£3.50 and quality. Building on this reputation, the IC -R72 HF receiver is one C-225 Deluxe carrying case for HF-225 £30.15 £4.00 of a new line of wideband receivers to satisfy listeners everywhere. This compact receiver has continuous coverage from 100kHz-30MHz, in SSB, AM and CW modes. An optional UI-8 adds FM reception. The AR -2000 easy to operate IC -R72 is superb for beginners or experienced DXers Hand-held wide band scanning alike and is equipped for a variety of functions. receiver. Improved specification. Price £659Carr. £12.00 The coverage is 500KHz - 1300MHz with no gaps. Modes are AM, FM (narrow) and FM (wide). The lV R-5000 AR2000 features 1000 memories for spot frequencies and 10 search banks. The receiver is powered from its supplied internal nicad batteries but these may be removed anddrybatteries substituted to allow extended operation in the field. The AR2000 may also be charged and powered from the car cigar lighter socket using the supplied lead. Also supplied as standard are the DA900 wide band aerial, soft case R-5000 Kenwood HF communications receiver 100kHz to 30MHz £895.00 £12.00 with strap and AC charger. J OPTIONS: DCK-212nit of power kit E9.50 E2.00YK88C 500Hí CW filter EA7.10 E2.00 R.R.P. including VAT £259 VC -20 VHF Converter for 108-174MHzE170.85 E4.00YK88CN 270Hz CW filter. E55.85E2.00 (p&p £5). VS -1 speech synthesiser for 8.5000 E33.00 E2.00SP -430 External speaker unit E41.70E4.00 YK88A 16kHz AM CyrStal fitter...... E50.45 £2.00

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Short Wave Magazine, November 1991 55 English Regional Service The station as operated by 11.604MHz (YZJ2), 0400-05000TC, Harry Scrase. SE Asia. 13.44MHz (YZJ5), 0400-05000TC, Far East. Sunday and Monday only 16.343M Hz (YZI41,1300-14000TC, E. Africa. 20.204MHz (YZJ1,1300-14000TC, S. Africa. French Regional Service 20.204MHz (YZJ),1200-13000TC, S. Africa (Angola). QSLs should include a SINPO report and it might be a good idea to include a sample print-out. The correspond- ence address is: TANJUG World Service, ObilicevVenac 2, PostFAH439, BELGRADE, Yugoslavia.

Photo -Call Press Photos

The featured listener for this month is For those of you with the ability to Harry Scrase from Sandwich in Kent. receive FAX images with a grey scale, Harry has been a keen short wave press photos seem to be the most listener for many years and is a mem- popular. For this reason, I've pulled ber of the International Short Wave together a few of these stations that League. You can see from the photo you might like to try. One of the most that Harry has a very impressive popular, and consistent, is DPA equipment line-up. The main receivers Frankfurt)DCF39) on 139kHz. This uses comprise an Icom R-9000 and the NRD- a narrow shift of 150Hz combined with 525these are fed by two Datong active a drum speed and IOC of 120/352. The antennas and a discone mounted ex- transmissions seem to be pretty well ternally. On the decoding front Harry continuous between about 0300 and usestheverycomprehensive 23000TC. Wavecom W-4010. This is comple- One of my own personal favourites mented by a CWR-675 stand alone RTTY is the Associated Press transmissions decoder. from Buenos Aires. Normally the best My thanks to Harry for taking the frequency is 17.672MHz (LQZ67), but trouble to write. If you would like your otherfrequenciestotryare: Fig. 3: Severe smudging of a FAX signal as shown in Klingenfuss station featured, send me a photo of 10.6795MHz (LRN2) and 20.736MHz Guide To FAX Stations. you and your station with as many (LSA600). The main problem with re- details as possible. ception of this station is adjacent channel interference, but this can Frequency List usually be minimised by careful use of RTTY Contest the pass band tuning. Justto complete Now for this months' selection of fre- 8.687MHz, CW, SVA4, 0410, the picture (excuse the pun) here are a quencies. I've used the normal format Athens radio Bo Ohlsson from Fellingsbro in Swe- selection of stations you might like to of frequency, mode, speed, shift, 8.697MHz, CW, _, _, CFH, 0420, den has written with details of the try: callsign, time and notes. If you would Halifax naval SARTG amateur RTTY contest that 4.316MHz (JJC), Tokyo Radio, 160/ like a copy of my latest list just send 9.43MHz, RTTY, 50, 400,-, 0820, takes place on New Years Day. For 288 or 120/576. three 1st or 2nd class stamps to the Tirana press those of you who may not have come 5.117MHz(3MA29),CNATaipei,60/ address at the head of the column. 9.797MHz, RTTY, 50, 400, -, 0910, across these contests, I'll outline what 288. 3.55MHz, RTTY, 50, -, YMA20, 0005, Rompress happens. The main objective is to 5.7775MHz (LR026), AP Buenos Ankara Met 10.634MHz, RTTY, 50, 400, CNM37, contact as many stations as possible Aires, 60/288 4.2585MHz, RTTY, 75, -, GYA, 0150, 1550, MAP RABAT from as far away as possible. Points 6.874MHz (LRB79), AP Buenos Royal Navy 10.792MHz, RTTY, 75, -, VoA, 0001, are awarded for each contact and Aires, 60/288 6.358M Hz, RTTY, 75,400, PBC,1523, Voice of America additional points are gained for dif- 7.3637MHz (HMF88), KCNA Dutch Navy 11.063MHz, RTTY, 50, 400, -, 0900, ferent countries and continents. Pyongyang, 60/288 7.959MHz, RTTY, 50, 400, 9BC23, Sofia met In order for a contact to count, a 9.242MHz (LR064), DYN Buenos 1816, IRNA Tehran - News 11.08MHz, RTTY, 50, 400, YKP28, standard message has to be ex- Aires, 60/288 8.030MHz, RTTY, 50, 400, IRF50, 1816, SANA Damascus - News changed between each station. This 10.679MHz (LRN2), AP Buenos 0950, Rome Press ANSA 11.475MHz, RTTY, 50,-, HMF52, usually comprises a three digit serial Aires, 60/288 8.049MHz, RTTY, 50, 400, -, 1945, 1855, KCNA Pyongyang English news number, signal report and, of course, 13.7535MHz (LRB75), Reuters IRNA Tehran - News 11.638M Hz, RTTY, 50, -, D DK8, 0450, the callsigns. The main enjoyment in Buenos Aires, 60/288 (rarely heard) 8.14MHz, RTTY, 50, 400,-, 0450, Hamburg Meteo these contests comes from testing the 13.9MHz, Unknown, 120/576 TASS Moscow 12.801MHz, CW, _,-, TAH, 1135, skills of the operator, but many short 16.23MHz (JAQ66), Kyodo Tokyo, 8.437M Hz, CW, -, -,4XZ, 0230, Israeli Istanbul listeners do join -in. Most con- 60/576 naval 14.49MHz, RTTY, 50, 400, -, 0940, tests, including the SARTG one, have 17.762MHz (LQZ67(, AP Buenos 8.574MHz, CW, _,-, LGB, 0230, TASS Moscow separate sections for short wave lis- Aires, 60/288 Rogaland radio 16.136MHz, RTTY, 75, 400, BZR66, teners so you can win a certificate. If 20.736MHz (LSA600), AP Buenos 8.652MHz, CW, -,-, PCH40, 0215, 1230, Beijing press you'd like more information write to Bo Aries, 60/288 Scheveningen Radio 17.06MHz, CW, -, -, 4X0, 0505, Haifa Ohlsson SM4CMG, Skulsta 1258, S-710 If you have any particular favour- 8.6835MHz, CW, -,-, DAM, 0610, 18.125MHz, RTTY, 50, 400, RND70, 41 FELLINGSBRO, Sweden. ites, please write with the details. Norddeich radio 1323, TASS Moscow 56 Short Wave Magazine, November 1991 /ion-, 0' Lawrence Harris 5 Burnham Park Road, Peverell, Plymouth, Devon PL3 5QB.

The summer months have brought UK. Its position cannot be adjusted, or many pictures for this column and so I 'ranged' as the controllers call it, and am including more of thesethan usual. so is not transmitting in a fixed direc- Another trend has been the number of tion. From western Britain it rises to requestsfor informationfor beginners. some 15° above the western horizon Since the special Weather Watching during the mid afternoon, but dips be- supplement was published last April low during the early hours of the new products are reaching the market morning. Several SWM readers have and others are being upgraded. been able to monitor afternoon trans- missions. Just a few degrees to the left Current WXSATS of GOES is the 'borrowed' METEOSAT 3 geostationary satellite, now called As of mid -September all four of the Atlantic Data Coverage (ADC) and NOAA WXSATs are in operation, but operating the schedule mentioned last asthe passes overlap, one or more are month. METEOSAT4 has continued to switched off. Until recently, NOAA 10 broadcast scheduled imagery - and took priority over NOAA 12, but this see the later paragraph labelled changes as from September. So we AVHRR pictures. should now have NOAA 12transmitting during pass clashes with NOAA 10. Summer Views NOAA 9 is now considered to be 'ex- perimental' though the tests are likely Following the reports from America Fig. 1: Europe seen by a NOAA, from Jim Granville. to affect only the h.r.p.t. data. There about NOAA 9 having problems, I had was a report that the minute markers a close look at the evening pictures on NOAA 12 had disappeared, but I during the hot summer patch in early obtained from the usual WXSATS and future editions and extend both my never saw them missing. The detail at September. The warm Atlantic and forfuture editions I am hoping to obtain thanks and our congratulations to the the edge of NOAA pictures can be North Sea show up very well in the some of the very high resolution ones Professor and his team at Surrey. It is seen in Fig.1. It includes the markers, infra -red section, with Paris, London from ESA and N OAA. The University of pleasing to hear of successes in the and where you can resolve the mark- and Birmingham particularly identifi- Surrey are also involved in satellite British space programme at this time. ers on your own systems you will know able. In fact, with such clear skies,the imagery, under Professor Martin that each has two lines. The other side variations inwatertemperaturearound Sweeting G3YJO and his group who Letters oftheframe shows a set of grey scales the UK and the continent gave the control the UoSAT satellites. UoSAT 5 and can be used to adjustyour picture impression of 3-D pictures. Water near is the fifth in the British series of small Many letters continue to request for best quality. theshores is considerablywarmerthan low-cost spacecraft and is fitted with Kepler elements, and these are nor- METEOR 3-5 operated for a few that in the middle of the Channel. a CCD Earth Imaging System. It was mally updated each week from NASA hours following its August launch, but Similarly, the waters of the sunny launched alongside ERS 1 on July 17, information. Correspondents usually has been silent since. I don'tthinkthat Mediterranean were revealing fasci- has a resolution of 2km and carries out take the opportunity to describe their this indicates a fault - other METEORs nating temperature differentials. To sophisticated on -board image data satellite monitoring activities, which is have been operated similarly, being see the complete picture you do need compression and processing before welcome. Geoffrey Chance of Redruth tested for 24 hours after launch and to view with 64 grey levels, so bear that transmission. usesthe APT -1 modulefromTechnical then having their a.p.t. switched off. in mind when considering either up- Professor Sweeting has kindly sent Software for decoding pictures and METEOR 2-19 remained operating for grading or purchasing from new. me a transparencytogether with some told me that he had some problems several weeks, but predictably, as it Although some of the snow has details about the satellite, which has getting properly synchronised pic- approached the morning terminator in melted on the Swiss Alps, they remain already transmitted images of the tures. The fault was eventually traced mid September, it was switched off easily recognisable forthe whole year. Mediterranean, Gulf States, Korea, by Richard Wilmot of Technical Soft- and METEOR 2-20 commanded back Have a glance at Mount Etna in Sicily, Hawaii and many other regions with ware and Geoffrey mentions Richard's on,using the same frequency which always stands out well. Lastly, superb resolution, comparable to the courtesy and patience. Geoffrey (137.85MHz). METEOR 3-4 has been the ice -flows along the south eastern NOAA satellites. The ground control- promises some print-outs as soon as transmitting both visible and i.r. as coast of Greenland retreat during lers at Surrey University are able to he has masteredthe setting of the grey normal. summer and allowwarmerwaterto go routinely programthesatellitetorecord levels! The Chinese controllers have further inland - all very easyto monitor imagery while passing over various A wide range of questions were managed to partially stabilise the atti- in both infra -red and visible. areas and store the data until within posed by Terry Day of Hull. He has an tude of FENG YUN 1B and it is now range of the University. Professor AT (advanced technology) compatible transmitting, butonlywhile near China! UoSAT 5 Pictures Sweeting points out that within a computer and now wants to purchase GOES continues to wander above and budget of £1 M they now have a satel- hardware and software for satellite below the western horizon here in the I regularly publishes readers' pictures lite independent of governments orthe decoding. Terry points outthe range of military, able to monitor world-wide prices andfacilitiesoffered bythe main weather and climate. I will be provid- suppliers of WXSAT equipment and ing more information about UoSAT 5 in wonders whether they all do the same

' Fig. 2: Italy scanned by METEOSAT, from Peter Cotton.

Fig. 3: Europe (AVHRR) scanned by METEOSAT 4, from Brian Dudman. Short Wave Magazine, November 1991 57 try fo o r/h íÓ" *

job. Careful checking of program PCSAT3 with a 0.9m dish feeding a 386 to the schedule - called simply AVHRR. specifications is essential. Decide PC (i.e., a computer fitted with the 80386 The times are 0726, 1026 and 2226UTC which facilities are particularly processor) and 4Mb of RAM, which he when a transmission of the UK and Fig. 4: South America scanned wanted: picture quality, picture leaves running 24 hours a day in ani- Europe, as seen by the NOAA AVHRR by METEOSAT 3, from Brian processing (i.e. the ability to add false mation mode. The other is for the polar sensors, can be received. A picture of Dudman. colour and stretch the contrast), ani- orbiters using the Timestep Proscan this frame was sent to me by Brian mation, automatic data capture; these receiver. Mr Finch comments that he Dudman of Harrow and is shown in Fig Australia may be included or absent and one is sure that FENGYUN 1B was recently 3. Brian is using a Timestep Yagi, pre - must also check whether the compu- transmitting again on 137.80M Hz, even amp and METEOSAT receiver feeding While visiting Britain, ProfessorGerald ter can run them without hardware though onlyfora few minutes, and was a Mitac 286 AT computer. Brian com- Sargent of Brisbane in Australia rang modifications. intermittent. As mentioned before the ments that, not being familiar with me and told me abouttheir groups that Yachting isa hobby shared by Chinese are trying to correct the computers he had a lot to learn and monitor weather land other) satellites. several readers of this column, in- problems with FENGYUNs attitude had difficulty setting up the monitor. He was particularly surprised at the cluding Andrew Freeman of Wallasey. (pointing accuracy), so we may well He points out that not all hardware is cost of equipment in the UK. It seems There is an increasing variety of hear it at sometime. water -proof and that items such as that satellite picture decoding hard- weather satellite picture decoding Bob Warriner of Lancing has up- pre -amps need to be protected against ware and software is rather cheaper equipment being produced for the graded his fixed dish system to a the elements. in Australia, though many people build yachting fraternity, suitable for using steerable unit and can now monitor My own down -converter suffered their own as a project. on board. The normal crossed -dipole GOES. I have mentionedthe movement some corrosion even though it was antenna should be satisfactory be- of GOES near the horizon, which Bob apparently weather-proof. I now op- Kepler Elements cause there is no need to point the experiences, and he asked about a erate it within a plastics 'sandwich' antenna atthe satellite - receivers are GOES replacement. It seems that the box and bringitin for occasional As usual, Iwill send a print-out of the sensitive enough to pick up the pow- next GOES will not be launched until checks. Brian has also bought latestelements upon receiving an s.a.e. erful signals, particularly at sea where possibly 1992 because of problems. Timestep's Prosat2 software and a All weather satellites are included, reflections from nearby buildings, and That is why METEOSAT 3 was moved second computer! There will be more together with their transmission fre- interference from paging units must nearerthe USA. Interestingly Bob picks pictures from Brian next month. quencies if operating. I recently re- be negligible! I don't personally know up the METEOSAT 4 signal while Correspondent Peter de Jong of ceived such a request from Josep of specific units, but I know a man who pointing near GOES. Perhaps there is a Leiden in Holland has sent in his de- Bruno Argilaguet of Spain who is a does - so I'll see what is available. local reflection. tailed monitoring observations and member of a Spanish group who are C Harper of Blackpool has recently some more photographs, and com- interested in meteorology. They are started WXSAT monitoring, using a METEOSAT Schedules ments that you can see the Japanese particularly keen on monitoring Martelec receiver fed from a Micro- GMS satellite pictures by watching METEOSAT. wave Modules METEOSAT antenna Bob asks about obtaining a METEOSAT the JSTV programme on Channel 24 and down -converter. I saw a picture of 3 transmission schedule.This,together broadcast by the Astra 1B satellite. InstantTrack this antenna some years ago and it with the slightly modified METEOSAT4 Tune in at about 2145 and 2315UTC and seemed very large. Incidentally, I be- schedule, is available from EUMETSAT you may see the whole disk picture. Some readers may have heard of re- lieve that Microwave Modules have at: Am Elfen grund 45 See also Fig. 6. cent controversy involving this soft- finished their involvement in the ama- D-6100 Darmstadt-Eberstadt ware which is currently marketed by teur market,their products having been GERMANY. Geostationary Satellites both Timestep Weather Systems and taken over by Timestep Weather Sys- AMSAT-UK. The problems were re- tems. Framestore Components? Apartfrom METEOSAT and GOES there solved and no purchaser of this soft- David Brown of Port Erin has up- are literally hundreds of satellites in ware should feel concerned. graded his previous framestore-type I had a call from Graham Smith G1JVZ the geostationary orbit. Goren Billing decoding system to the Proscan re- of Chislehurst who wants to build a of Bournemouth asked aboutobtaining New Book ceiver from Timestep. This is one of the framestore, but he has not been able a list of them. My own list is now four units which is apparently immune to to find a component supplier. Can any- years out of date, but this type of in- During the time that I was setting up interference, soI await reports from one help? Originally one could pur- formation is published in Satellite News my own satellite receiving system I users. David feeds the signal into a 286 chase a kit of all the parts. which is a specialist monthly publica- had difficulty in locating information (i.e. an 80286) computer fitted with an tion edited by Geoffrey Falworth of and suppliers for some items, and so I SVGA monitor and PC SAT3 software. AVHRR Pictures Preston.I am happy to forward any kept notes on the various problems He also recently received a book called mail for Geoffrey. The weathersats that I came across. Since then I have The Illustrated Encyclopedia of Space A telephone call from Donald Martin mentioned above all use 1691MHz for received many questions about setting Technology published by Salamanda, of Cleveland pointed out the new ex- their WEFAX transmissions so obvi- up similar stations and other satellite which he recommends. perimental WEFAX pictures from ously if you can receive METEOSAT matters, so I am putting together a EJ Finch of Peterborough has two METEOSAT 4, which he monitored us- thenthere are currentlythree satellites book on satellite monitoring and hope satellite systems, one uses Timestep's ing PCGOES. I didn't spot this addition to monitor. to see publication, through PW Pub- lishing next spring. Further details will appear in future months, but mean- while I shall be glad to hearfrom anyone who has any suggestions to make about possible items for inclusion. August was a record month for letters and photographs so several have been held over until the next edition.

Frequencies

NOAAS 9, 11 a.p.t. on 137.62MHz NOAAS 10, 12 on 137.50MHz METEOR 2-19 or 2-20 on 137.85MHz METEOR 3-4 or 3-5 on 137.30MHz OKEAN 2 and 3 on 137.40MHz occa- sionally Fig. 5: North America scanned by METEOSAT 3, Fig. 6: Japanese weather forecaster, from Peter de FENGYUN 1-2 was on 137.80MHz(keep from Peter de Jong. Jong. UoSAT 5 watching this!) 58 Short Wave Magazine, November 1991 JAVIATION THE VHF/UHF AIRBAND SPECIALISTS AT LAST! ÁR2515 Our new combined VHF/UHF frequency listing running to some 100 pages is now available. The new publication is in the same format as our previous individual lists Available from stock and will be updated with the same regularity. Not only have we joined both lists supplied with FREE together but added some extra information as well. IBM PC software. VHF/UHF VHF , UHF AR2800 Frequency Also available from Listing: stock worth giving us a £6.50 + £1 p&p call! ÁR2000 I would like to thank all of you who have, over the years purchased our listings and for the many kind In stock, supplied with & constructive comments that we have received FREE leather carry along with the many snippits of valuable information that you have sent in. case. £259.00

Thanks. Carlton Works, Carlton Street, BRADFORD, West Yorkshire BD7 1DA Telephone: (0274) 732146 Facsimile: (0274) 722627

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60 Short Wave Magazine, November 1991 Co)I/Er C ¡II eo/WL/ Brian Oddy G3FEX Three Corners, Merryfield Way, Storrington, West Sussex RH2O 4NS.

ust after SWM arrives on the them S10333,acontrastto his home in by hand to any bearing from 250- 290°. travelled along ground wave paths to bookstalls, the time system in the UK Largs, where signals are marred by Each night, Jim searched the band quite distant places! Despite fading will change from British Summer Time sideband splatter from Atlantic 252. and logged 16 stations in Canada, 11 in and interference, PhilTownsend heard (BST) to Greenwich Mean Time (GMT The coloured map of European broad- the USA, 5 in the Caribbean and 5 in them in E.London.Theywere also heard or UTC). At midnight on October 27, all casting stations inDial Search*shows S.America. The earliest was CJYQ in in N.London. On the loW, George clocks must be turned back one hour, the path between Kalundbourg and St.John's, NF on 930 rated S10333 at Millmore (Wootten) logged them as butthe one by your radio will not need Melvick is mainly over the sea, offer- 0020. At 0600 ACB 20 in Panama was SI0343. adjustment if it is already set to UTC. ing little attenuation to I.w. signals, peaking SI0222.Aworthwhileventure. A weekend in Bournemouth ena- whereas the path from Clarkestown Some signals from N.Africa have bled RobertLawrence(Cheltenham)to Long Wave Reports includes the highlands of Scotland. reachedthe UK after dark.Those noted check the band from a new location. (*Available from S WMBook Service). from Algeria were Ain Beida 531 (600/ He heard BBC R.Cornwall via Bodmin Note: I.w. & m.w. in kHz; s.w. in MHz; Signals from the BBC Westerglen 300kW)byDarren Beasleyin 675; R.Devon via Exeter 990; R.Jersey Time in UTC (=GMT). Unless stated, all and Burghead stations (50kW), which Bridgwater; Les Trembles 549 (600kW) 1026; R.Guernsey 1116; also ILR logs were compiled during the four share 198kHz with Droitwich (500kw), by Ron Galliers in N.London; Djanet DevonAir R. via Occombe 954 and week period ending September 7. were heard in Derby by Roy Patrick 783 (5kW) 43444 at 2321 by Leo Barr in several nearby stations. His chart en- Signals from Leningrad on 234kHz whilst Droitwich was 'off the air' for Sunderland; Algiers 891 (600/300kW) tries were logged at home. were logged for the first time by Eddie maintenance on the morning of Au- SI0222 by Lee Williams in Birming- McKeown in Co.Down. He rated the gust 30. The combined signal was S5. ham; Algiers 981 (600/300kW) 54555 at Short Wave Reports signal as 21321 at 0312. He says, "I was 2239 by Noel Carrington in Sutton-in- quite stunned to hear this, but it was MW Reports Ashfield. Also Sidi Bennour, Morocco The most distant 25MHz (11m) signals quite audible against the usual 640 (600kW); Sebaa-Aioun, Morocco to reach the UK come from R. Austral- Junglinster background." Eddie has A 10 -day DXpedition to Dollar Law, 10441300kW) and Tunis-Djedida, Tuni- ia's Darwin station. Although the solar been monitoring 225kHz hoping to hear Scotland made a welcome change for sia 630 (600kW). activity has resulted in daily propaga- the new 600kW station in Van, Turkey, Jim Willettof Grimsby. The equipment The signals from Yugoslavia via tion variations, their signals on 25.750 so far, the strong co -channel signal consisted of a giant 5m square loop Zadar on 1134(1200kW) have attracted (Eng to Asia, M.East 0900-1100) have from Konstantinow has stopped him. with differential pre -amp, a CL22 a.t.u. attention. Followingthe announcement often reached here like a local! The In Melvick, on the north coast of and Lowe HF-235. Electrics were pro- 'Croatia Radio' a news bulletin in Eng- SI0455 by Simon Hamer in New Radnor Scotland,JohnStevensfound he could vided by a small Honda generator. The lish was heard at 2100 by Roy Patrick. at 1000 says it all. Some daysthe signal hearthe signalsfrom Kalundborg, Den- loop was taken in sections and then In daylight, the signals from BBC has been weak or even non-existent. mark on 243kHz clearly all day. He rated assembled and erected. It couldturned Radio Clwyd, Wrexham on 657 have Very potent signals have reached here from the Voice of the UAE in Abu Local Radio Chart Dhabi on 25.690 most days. The broad- ILR Listener FreqStation ILII e.m.r.p.Listener Freq Station e.m.r.p. cast in Arabic was 55354 at 0712 in kHz BBC (kW) kHz BBC IkWI Co.Down. Others taking advantage of 170 R.Orwell 0.28 D,0 558 Spectrum R. I 7.50 B,E,F,H*,I,K,L,O 0.20 B,C,E,I,L the conditions in this band include 585 R.Solway B 2.00 B,J 170 Signal R. 170 Swansea Sound 0.58 I 603 Invicta Snd(Coast) I 0.10 C,D,E,F,H,I,K,M,O Radio Norway Int, Oslo 25.730, Radio 032 C,F,H,L,M,O 603 R.Gloucester B 0.10 B,G,I,K,L,O 242 Invicta Snd)Coast) Moscow 25.780 and RFI Paris 25.820. 0.50 K,L* 630 R.Bedfordshire B 0.20 B,C,D,F,H,I,K,L,M,O 242Isle of Wight R. 0.76 F,J*,M,O The 11m broadcasts from HCJB in 630 R.Cornwall B 2.00 K 251Saxon R. 1.60 657 R.Clwyd B 2.00 B,E,F,I,J,K,L*,M,O 260 GWR (Brunel R.) Quito, Ecuador were discontinued in 0.29 E,L,M 657 R.Cornwall B 0.50 K 260 Leicester)GEM-AM) mid -August. Until then, many listeners 260 Marcher Sound 0.64 B,J* 666 DevonAir R. I 034 D,H,I,K,O 0.43 B,C enjoyed good reception of their upper 666 R.York 0.80 B,L*,0 278 Pennine R.(C.Gold) 0.15 B,C 729 BBC Essex 0.20 D,F,K,L,M,O 305 R.Hallam (C.Gold) sideband (u.s.b.) plus pilot carrier (p.c.) 0.20 E,G,I,J*,K,L* 738 Hereford/Worcester 0.037 B,C,E,F,I,K,L,M,O 305 Red Dragon (Touch) transmissions. Hopefully, they will be B 0.63 G,I,J'1*,0 756 R.Cumbria 1.00 B,J 323 R.Bristol (Som.Snd) 0.50 F,K,M,O reinstated soon, meanwhile try their 756 R.Shrapshire 0.63 B,F,I,K,L,O 323 S'thern Ssund)SCR) 0.60 J*,L,M,N,O 13m u.s.b.+ p.c. service on 21.455MHz. 765 BBC Essex 0.50 A*,C,D,E,F,L*,M,O 332 Hereward R.P'boro B 0.30 I.J'.K,O 774 R.Kent 0.70 D,F,K,M,O 332 Wiltshire Sound Although for other areas, some R. 0.28 F,H,M,O 774 R.Leeds 0.50 B,C,J* 359 Essex R.IBreeze) Australia's 21MHz (13m) signals have 359 Mercia SndlXtra-AMI 0.27 B,E,I,J*,L,O 774 Severn Sound (3CR) I 0.14 B,G,I,K,L 359 Red Dragon (Touch) 0.20 G,J* been heard here in the morning. Those 792 Chiltern R. I 0.27 C,D,E,F,H,I,K,L,M,O B 0.85 J*,K 801 R.Devon B 2.00 H,J,K,L*,0 359 R.Solent to Asia via Carnarvon 21.775(Eng0100- 368 R.Lincolnshire B 2.00 B,J' 819 Hereford/Worcester B 0.037 E,I,K,L,0 1000) were 35553 at 0655 by David 368 R.Sussex B 0.50 E,F,H,K,M,O 828 Chiltern Radio I 0.20 D,F,H,I,M,O 368 Wiltshire Sound B 0.10 I,K,L* Edwardson in Wallsend; to C/SE.Asia 828 R.Aire(Magic 828) I 0.12 B 0.125 H',K,M,O 828 R.WM B 0.20 B,C,I,L 413 Sunrise R. via Darwin 21.525 (Eng 0100-0800)33233 431 Essex R.)Breeze) 0.35 C*,F,H,J*,M,O 828 2CR I 0.27 I,K,O at0705 in Co.Down;to SE.Asia, M.East 0.14 I,K,O 837 R.Cumbria 1.50 B 431 Radio 210 0.15 I,K,O 21.720 (Eng 1100-1330)33433 at 1100 by 837 R.Furness 1.00 B 449 R.Peterhoro/Cambs 50.00 K,0 837 R.Leicester 0.45 B,C,D,E,F,I,K,L,M,N,O 458 GLR Darran Taplin in Brenchley. 5.00 B,E,J' 855 R.Devon 1.00 K 4581 GMR Also heard in the morning were the 4581 R.Cumbria 0.50 J 855 R.Lancashire 1.50 B,C,J,L* BBC via Ascension Is 21.660 (Eng to 458 R.Devon 2.00 K,0 855 R.Norfolk 1.50 D,F,K,M,O 5.00 B,C',G,I,L S.Africa 0900-1745) S10333 at 0900 by 873 R.Norfolk 0.30 C,D,F,J*,K,L,M,O 458 Radio WM 476 C'tySndltstGold) 0.50 F,I,J*,K,O 936 GWR (Brunel R.) I 0.18 G,I,K,L,O Bill Clark in Rotherham; DW via Julich 485 R.Merseyside 1.20 B,E,J,L 945 R.Trent (GEM -AM) I 0.20 B,C*,E,I,J*,K,L,O 21.680 (Eng to Australia, N. Zealand 485 R.Oxford 0.50 C,I,K,O 954 DevonAir R. I 0.32 H,K,O 485 R.Sussex 1.00 F,H,K,O 0900-0950) S10232 at 0950 by John 954 R.Wyvern I 0.16 C*,I,J*,K,L,O 503 R.Stoke-on-Trent 1.00 B,C*,F,H',I,J*,K,L,O 990 WABC (Nice & Easy) I 0.09 B,E,I,L Sadler in Bishops Stortford; R.Afghani- R.Mercury 0.84 E,F,H*,K,M,O 990 R.Devon B 1.00 H,K,O 521 stan via USSR? 21.600 (Eng to Asia 0.50 B,C,J*,L 999 R.Solent B 1.00 F,H,I,K,O 521 R.Nottingham 530 Pennine R.IC.Gold) 0.74 B,C,J' 0930-1030)43433 at 1015 in Bridgwater; 999 R.Trent (GEM -AM) I 0.25 B,C*,I,0 530 R.Essex B 0.15 F,K,M 999 Red Rose R. I 0.80 B,J R.Nederlands via Flevo 21.520 (Eng to 0.52 I,J*,K,L 1017WABC Shrewsbury I 0.70 B,C*,I,K,L,O 530 R.Wyvern 97.50 H*,K,O 1026R.Cambridgeshire B 0.50 B,D,E,F,I,M,O 548 Capital R. (Gold) Listeners: B 5.00 1026R.Jersey B 1.00 K,0 548 R.Bristol A: Leo Barr, Sunderland. 4.40 B 1035R.Kent B 0.50 D,F,K,M,O 548 R.City (City Talk) B: Tim Bucknall, Congleton. 548 R.Forth (Max AM) 2.20 I 1035R.Sheffield B 1.00 B,C C: Noel Carrington, Sutton-in-Ashfield. 548 R.Hallam )C.Gold) 0.74 B,C',J* 1035West Sound I 0.32 J O: Tony Elkins, Bury St.Edmunds. 0.76 C,D,I 1107R.Northampton B 0.50 E,F,I,J,K,L*,0 557 Chiltern R.)Gold) 0.50 E,K E: David Forester, Newcastle-under-Lyme 1116R.Derby B 1.20 B,C,I,J*,L,O 557 Ocean Sound (SCR) B 0.25 B,J* F: Ron Galliers, N.London. 1116R.Guernsey B 0.50 K,0 557R. Lancashire 564 Gatwick 0.10 H*,K,M,O G: Francis Hearne, Bristol. 1152BRMB (Xtra-AM) I 3.00 C,E,I,J*,L 584 Heathrow 0.10 H*.M,O H: Sheila Hughes, Morden. 1152LBC (L.Talkback R) I 23.50 H*,K,O 584 R.Nottingham B 1.00 B,C`,J' I: Robert Lawrence, Cheltenham. 1152Piccadilly R. I 1.50 B 584R. Shropshire B 0.50 B,E,I,L J: Eddie McKeown, Co.Down. 1152R.Broadland I 0.83 0,J*,0 602 R.Kent B 0.25 C',F,J*,K,M,O K: George Millmore, Wootton, IOW. 1161GWR (Brunel R.) I 0.16 G,I,K,L 1161R.Bedfordshire B 0.10 0,0 L: Sid Morris, Rowley Regis. 1161R.Sussex B 1.00 H,K,O M: Phil Townsend, E.London. Note: Entries marked' were logged during darkness. All other entries I 1161R.Tay - 1.40 J* N: Ted Walden -Vincent, Gt.Yarmouth. were logged during daylight or at dawn/dusk. 1170Ocean Sd.(SCR) I 0.12 K,0 0: John Wells, East Grinstead.

Short Wave Magazine, November 1991 61 O/olgmod8izro/m Long Wave Chart Freq Station Country Power Listener S3h O l* kHz IKW). 153 Bechar Algeria 1000 J* 153 Donebach Germany 500 A,B,C*,D,E,G',H,J,M 153 Brasov Romania 1200 G* 153 Engels USSR 150 B* 162 Allouis France 2000 A,B,C',E,G,H,I*,J,M,N 171 Kaliningrad Lithuania 1000 A,C',G,H,J 177 Oranienburg Germany 750 A,B*,D,E,G*,H,J 183 Saarlouis Germany 2000 S.Asia 1130-1225) S10333 at 1200 by 189 Motala Sweden 300 A Cyril Kellam in Sheffield. 198 BBC Burghead UK 50 Later, R.Austria Int, Moosbrunn Listeners: - 198 BBC Droitwich UK 500 B,C*,E,F,G,H,I,M A: Kenneth Buck, Edinburgh. 198 BBC Westerglen UK 50 A,K 21.490 (Ger, Sp, Eng, Fr to W.Africa, B: Tim Bucknall, Congleton. 207 Munich Germany 500 A. B,C',E,F,G*, H,I',J S.Europe 1300-1700) was S10444 at C: Noel Carrington, Sutton in Ashfield. 216 Roumoules Monaco 1400 A, B, C*, E, F,G', H, I*, J, N* 1325 by John Coulter in Winchester; D: Tony Elkins, Bury St.Edmunds. 216 Oslo Norway 200 A,G* R.Finland via Pori 21.550 (Eng to USA E: Ron Galliers, N.London. 225 Konstantinow Poland 2000 A,E,F*,G*,H,I',J F: Sheila Hughes, Morden. 234 Junglinster Luxembourg 2000 A, B, C*, E, F, G, H, I,J M, N * 1330-1345) 32432 at 1340 by John Nash G: Eddie McKeown, Co.Down. 234 Leningrad USSR 1000 G' in Brighton; RFI via Issoudun 21.770 H: George Millmore, Wootton, 10W. 243 Kalundborg Denmark 300 A, B,C*,E,F, H,1*,J,L, M (Eng, Fr to SE.Asia 1400-1600)45454 at I: Sid Morris, Rowley Regis. 252 Tipaza Algeria 1500 1442 by Jim Cash in Swanwick; J: Fred Pallant, Storrington. 252 Atlantic 252 S.Ireland 500 261 Burg Germany 200 E,H,N* R.Moscow 21.820 (Russto S.Asia 0600- K: Roy Patrick, Derby. L: John Stevens, Melvick, N.Scotland. 261 Moscow USSR 2000 A,B,F*,I' 1530) S10555 at 1458 by Philip Rambaut M: Ted Walden -Vincent, Gt.Yarmouth. 270 Topolna Czech. 1500 A,C',E,F',G*,H,1* in Macclesfield; WHRI Noblesville N: Lee Williams, Birmingham. 279 Minsk USSR 500 A,B*,E,G' 21.840 (Eng 1500-1700 Sat/Sun only, also to E. USA) S 10544 at 1520 by Bryan Note: Entries marked' were logged during darkness. All other entries were logged during daylight or at dawn/dusk. Kimber in Hereford; BRT via Wavre 21.815 (Eng to Africa 1730-1755)34333 at 1730 by Rhoderick Illman in Thumrait, Oman; WCSN Scotts Corner 21.545 (Eng to S.Africa 1800-2000) Tropical Bands Chart SI0444 at 1930 in E.London. Freq Station Country UTC DXer Freq Station Country UiC DXer MHz Among the 13m signals to Europe MHz 2.340 Fuzhou China 2130 U 4.835R.Tezulutlan, Cuban Guatemala 0300 G logged were R.Japan via Moyabi 21.575 2.445 Nanchang China 2212 U 4.835RTM Bamako Mali 2100 H,K,N,O

(Eng 0700-0800) 33333 at0700 by Sheila 2.470 R.Cacique ; Brazil 0216 U 4.845R.Cabecla, Manaus Brazil 0114 U Hughes in Morden; UAE R.Dubai 21.605 2.495 R.Madagascar Madagascar 2030 U 4.845RRI Ambon Indonesia 0620 U (Eng 1330-1400) S10555 at 1330 by 2.560Xinjiang China 2000 G,0 4.845ORTM Nouakchott Mauritania 2143 F,K AIR Lucknow India 2047 U 4.850R.Yaounde Cameroon 2100 G,H,I,J,K,N,O,R Kenneth Buck in Edinburgh; RCI via 3.205 3.215 R.Orange S.Africa 2040 B 4.855R.Sana Yemem Yemen 0420 U Sackville 21.545 (Eng, Fr 1400-1530) 3.220 R.Togo, Lome Togo 2135 U 4.860EP da Lunda-Sul Angola 1916 U heard at 1400 by Don Phillips in 3.225 RRI Tanjung Pinang Indonesia 2239 G 4.860AIR New Delhi India 1700 o Bridlington; HCJB Quito 21.455)u.s.b.+ 3.250 RRI Banjamarsin Indonesia 2030 U 4.865PBS Lanzhou China 2057 G,N 4.870R.Cotonou Benin 2055 A,H2O p.c.) 24444 at 1900 by John Robertson 3.255 BBC via Maseru Lesotho 2105 B 3.270AIR Kohina India 1440 4.870SLBC Colombo Sri Lanka 0010 in Alnwick, also 21.480 (Cz, Eng, Ger, 3.270SWABC 1, Namibia S.W.Africa 2030 O,U 4.875Super R.Roraima Brazil 0041 Sw, Sp 1800-2230) 44444 at 2200 by 3.295Reykjavik Iceland 2230 G,0 4.880AIR Lucknow India 2024 U Antonio De Abru-Teixeira in Durham; 3.315SLBS Freetown Sierra Leone 2200 B,M,0 4.885R.Clube do Para Brazil 2200 F,G WYFR 21.500 (Eng, Ger, Fr 1700-2000) 3.320R.Orion S.Africa 2045 A,B,M,U 4.885Voice of Kenya Kenya 1855 N 3.325R.Liberal Brazil 0120 U 4.890RFI Paris via Gabon 0000 M,0 45554 at 2000 by John Parry in 3.325FRCN Lagos Nigeria 2145 B,G,H,K 4.890 R.Port Moresby New Guinea 0612 u Northwich and 21.615 (Ger, It, Eng 1700- 4.890ORTS Dakar 2300 H 3.330 I R.Kigali Rwanda 2100 U Senegal 2000) 22232 at 2000 by Robin Harvey in 3.355! Noumea New Caledonia 0620 U 4.895Voz del Rio Arauca Colombia 0050 Bourne; VOFC via Okeechobee 21.720 3.365R.Rebelde, La Julia Cuba 0142 U 4.895AIR Kurseong India 0010 U 4.895 R.Moscow (Kalinin) Lithuania 2050 H,K,N (Eng 2200-2300)54444 at 2220 by Chris 3.365GBC Radio 2 Ghana 2130 A,B,G,H,J,K,0 3.370R.Tezulutlan Guatemala 0300 4.895 R.Moskva 4 (Tyumen) Siberia 2230 0 Shorten in Norwich. 3.915BBC Kranji Singapore 2019 K,S,U 4.900V. of the Strait 2 China 1630 Some days, good 17MHz (16m) DX 3.925NSB Tokyo Japan 0520 U 4900 V de la Rev.Conakry Guinea 2200 G reception was noted. R. NewZealand's 3.955BBC Daventry England 1945 H,I,J,K,L,O,S 4.900 SLBC Colombo Sri Lanka 0619 U 100kW signals from Rangataiki, 3.965RFI Paris France 2045 H,I,J,K,O,S 4.905 R.Relogio, Rio Brazil 2316 4.905.R.Nat.N'djamena Chad 1857 H,I,N,U N.Island on 17.770(Engto Pacific 2200- 3.970RFE Munich W.Germany 2315 3.980 VOA Munich W.Germany 1820 C,H,I,J,K,L,O,S 4.910 RZambia, Lusaka Zambia 2000 U 0630) was S10333 at 2300 in New 3.985R.Beijing, China via SRI Berne 2115 J,K,0,Q 4.915 R.Anhanguera Brazil 2330 G,M Radnor. One morning it peaked 54444 3.985SRI Berne Switz 2005 H,I,L,S 4.915 R.Ghana, Accra Ghana 2000 B,E,G,H,I,N,O in Norwich! Some R. Australia signals 3.995 OW Cologne (Julich) W.Germany 2121 C,H,J,K,L,O 4.915 Voice of Kenya Kenya 1832 N,U were also clearly heard here. The sig- 4.000Bofoussam Cameroon 1900 U 4.920 R.Quito Ecuador 0139 U 4.040R.Yerevan 1 USSR 2230 0 4.925R.Nacional, Bata Eq.Guinea 2200 U nal to Pacific areas via Shepparton 4.055R.Moskva 1 (Kalinin) USSR 1930 0 4.930R.Moscow USSR 2156 C,K 17.715 (Eng 2200-0530) was heard at 4.220PBS Xinjiang China 2200 C,O 4.935Voice of Kenya Kenya 1832 A,B,H,N,O,P,R 2300 by Sid Morris in Rowley Regis; to 4.500Xinjiang China 2215 G,J,O 4.940V of Strait, Fuzhou China 0220 U E/SE.Asia via Carnarvon 17.630 (Eng, 4.600R.Baghdad Iraq 2000 G,0 4.940R.Kiev 2 Ukraine 2100 C,G,H,I,K,N,O Chin 0000-0900) 35444 at 0025 in 4.635R.Dushanbe Tadzhik USSR 0015 M 4.945R.Nac.Porto Velho Brazil 0120 U 4.719RRI Ujung Padang Indonesia 0612 U 4.958R.Baku USSR 2000 F,0 Swanwick.The Shepparton signals to 4.725 BBS Rangoon Burma 0710 U 4.970R.Rumbos, Caracas Venezuela 0100 U Pacific areas 17.795(Eng, Fr0600-0800) 4.735Xinjiang China 2200 A,D,G,H,K,O 4.975R.Uganda, Kampala Uganda 1900 M,O,R was 32333 at 0625 in N.London; to Asia 4.755RRI Ujungpadang Indonesia 2130 0 4.980Ecos del Turbes Venezuela 2318 K,U via Darwin 17.750 (Fr, Eng 0600-0800) 4.760Yunnan Kumming China 2200 0 4.990FRCN Lagos Nigeria 2300 E,K,O 4.990RAncash, Huaraz Peru 0215 U as 43443 at 0737 in Bridgwater. 4.765R.Rural, Santarem Brazil 2345 4.765 Brazzaville Pep.Rep Congo 2100 A,C,D,G,H,I,J,K,N,O,S,U,4.990R.Moscow (Yerevan) USSR 0017 K Many broadcasts for outside Eu- 4.770 FRCN Kaduna Nigeria 2055 B,G,H,I,K,N,O,R,U 5.000YVTO Caracas Venezuela 0200 U rope are in English, but those in other 4,785 Caiari Porto Velho Brazil 0240 U 5.005R.Nacional, Bata Eq.Guinea 2010 U 4.785 RTM Bamako Mali 2300 H,M 5.010R.Garoua Cameroon 1835 N DXen: 4.785 R.Baku USSR 1828 N 5.010R.Malagasy Madagascar 2110 U A: Leo Barr, Sunderland. Swaziland 1800 N,0 5.010SBC Singapore Singapore 0516 U B: Darren Beasley, Bridgwater. 4.790TWR Manzini 5.020R.Nacional,Caracas Venezuela 0147 U C: Noel Carrington, Sutton in Ashfield. 4.795 R.Nueva America Bolivia 0300 U D: Jim Cash, Swanwick. 4.795 R.Douala Cameroon 1853 H,J,N,0 5.030R.Catolica, Quito Ecuador 2330 O,U E: Bill Clark, Rotherham. 4.800 PBS Xinjiang China 2204'.G 5.035R.Bangui C.Africa 2055 G,H F: Antonio De Abreu -Teixeira, Durham. 4.800AIR Hyderabad India 0030 M 5.035R.Alma Ata USSR 2130 K,0 G: David Edwardson, Wallsend. 4.800 LNBS Lesotho Maseru 1820', N,U 5.040Vos del Upano, MacasEcuador 0110 F,U H: Ron Galliers, N.London. 4.805 R.Nac.Amazonas Brazil 2250 F,H 5.045R.Cultura do Para Brazil 2210 F,G,K,M I: Sheila Hughes, Morden. 4.810 R.Orion, Jó burg S.Africa 2000' U 5.047R.Togo, Lome Togo 1850 H,K,N,O J: Bryan Kimber, Hereford. 4.810 R.Yerevan 2 USSR 2230 H,K,O 5.050AIR Aizawal India 2005 U K: Eddie McKeown, Co.Down. 4.815 R.diff TV Burkina Ouagadougou 1917 K,U 5.050SBC Singapore Singapore 2215 G,H2O L: Sid Morris, Rowley Regis. J' 4.820R.Moskva 4 (Khanty-MII USSR 1855 F,K,N 5.055 RFO Cayenne(MatouryFr. Guiana 0435 I,K M: Sergei Olejnik, Ukraine. 4.825R.Moscow I USSR 1855 K,N,0 5.055TWR Manzini Swaziland 0330 F,0 N: Fred Pallant, Storrington. 4.830Gaborone Botswana 2152 C,H 5.060 PBS Xinjiang China 2200 G,0 0: Don Phillips, Bridlinmgton. 4.830R.Bangkok Thailand 0520'U 5.075Caracol Bogata Colombia 2240 F,U P: Johm Robertson, Alnwick. 5.260RAlma Ata 2 USSR 2100 B,K,0 O: Chris Shorten, Norwich. 4.830R.Tachira I Venezuela 2300 F,G,H R: Darran Taplin, Brenchley. 4.832R.Reloj Costa Rica 0400 0 5.290R.Moskva 1Krasnoy'kUSSR 0310 u S: Phil Townsend, E.London. 4.832Altai Mongolia 2205 U 5.800PBS Xinjiang China 2335 T: Ted Walden -Vincent, Gt.Yarmouth. 4.835 ABC -Alice Springs Australia 0518 U U: Jim Willett, Dollar Law. 62 Short Wave Magazine, November 1991 O/oLrizig [modÓu7M W.GD1=fir*

Freq Station Country Power Listener Medium Wave Chart kHz (kW) 954 RCE Madrid Spain 20 B. Fret{ Station Country Power Listener 963 Pori Finland 600 B',N. kHz (kW) 972 Hamburg Germany 300 B',D',G',H,N' 972 Nikolayev USSR 500 G. Ain Beida Algeria 600 B',H' 981 Alger Algeria 600/300B',D',H,N' Leipzig Germany 100 B',C*,N',0 981 languages can often be identified by Ceske Budejovice Czech 30 C. Oviedo Spain 10 B',N',0 990 Berlin Germany 300 B',H,N' the preceding brief musical signature. Beromunster Switz 500 T, W' 990 SER R.Bilbao Spain 10 H Cheboksary USSR 30 Those noted came from Vatican R, C 990 BBC-Redmoss UK 1 B* BRT-2 Wavre Belgium Rome 17.630 (Eng to Africa 0630-0700) 150/50 B',C,D,H,N',O,P,U 990 BBC-Tywyn UK 1 N 44444 at 0630 in Morden; KHBI, N. Solt Hungary 2000 N' 999 R. Popular, Madrid Spain 20 B',H,N' Sidi Bennour Morocco 600 B',H* 999 Kishinev USSR 100 A. Mariana Is 17.555 (Eng to Asia 0800- Les Trembles Algeria 600 B',H',O 1008 Hilversum -5 Flevo Holland 400 A,B',D',H2O,P',U 1000) SI0223 at 0820 in Macclesfield; DLF Bayreuth Germany 200 B',D,G,H,N',O,U 1017 Rheinsender Germany 600 C',D',G',H,N' R.Beijing, China 17.710 (Eng toS.Pacific Nordkirchen Germany 100 P. 1044 Dresden Germany 250 D`,H',N' 0900-1100) heard at0900in Bridlington; Thurmau Germany 200 G 1044 Sebaa-Aioun Morocco 300 H' Moscow USSR 100 C,T' 1053 Zarogoza 10 DW via Julich 17.780 (Eng to Australia, Spain H' Espoo Finland 100 B. 1062 Kalundborg Denmark 250 H',N',W' N. Zealand 0900-0950) SI0444 at 0924 Valencia Spain 20 B',D,N',W 1071Brest France 20 N',0 in Rotherham and 17.830 (Ger to Berlin Germany 100 B*,H',N' 1071Lille France 40 H' W.Africa 2000-2200) 43333 at 2000 in RTE -1 Tullamore Ireland (S) 500 B',C,D,G,H2O,P,U 1071Riga Latvia 50 C' Bourne; SRI via Schwarzenburg 17.670 Volgograd USSR 250 N. 1080 Katowice Poland 1500 H' Muhlacker Germany 500 H 1089 BBC -R1 Moorside Edge 150 (It, Eng, Ger, Fr to Pacific 0800-1030) UK C,D Stuttgart Germany 500 B',N',0 1089 Krasnodar USSR 300 H',N' S10222 at 1015 by Francis Hearne in FIP Paris France 8 G,H2O,U 1089 Weimar Germany 20 N. Bristol, 17.830 (Eng to M.East, Africa RNE-1 Madrid Spain 200 B',N',P`,W' 1098 Bratislava Czech 750 G,H',N' 1530-1600) 53354 at 1532 in Co.Down Frankfurt Germany 400 B',G,H',N',D,U 1098 RNE-5 Spain 10 D,N' Muge Portugal 100 B. and 44444 at 1549 in Oman; R.Tunis via 1107 AFN via Munich Germany 40 D,F',G',N' Ink evsk USSR 100 C. 1107 BBC -R1 Wallasey UK 0.5 Sfax 17.500 (Ar 0700? -1600) SI0444 at C Zagreb Yugoslavia 20 G. 1116 Bari Italy 150 H',N' 1420 in Winchester; RSA Johannes- Lyon France 300 B',C',D 1125 La Louviere Belgium 20 0 burg 17.790(Engto W.Africa 1700-1800) BBC -R4 N'castle UK 2 C,D,N 1125 Stara Zagora Bulgaria 500 N' 44554 at 1700 in Alnwick; W WCR 17.525 Kiel Germany 10 G 1125 ONE 5 Spain 10 H',N' 100 RTE -2 Athlone Ireland IS) B`,C,D,O,P,U,V,W' 1125 BBC Llandrindod Wells UK 1 M (Eng to USA 1500-2000) heard at 1900 in Tallinn USSR 100 C. 1134 Zadar Yugoslavia, 1200 B,C',D,E',H', Derby; V. of Israel, Jerusalem 17.630 RTBF-1 Wavre Belgium 80 B',D,H,N',O,P',U K',N',O,R` (Eng to Africa 1900-1930) S10455 at Vigra Norway 100 B',N' 1143 AFN via Stuttgart Germany 10 A,N',P' Tunis-Djedeida Tunisia 600 1905 in Edinburgh; BRT 17.550 (Eng to H. 1143 Century R. Dublin Ireland IS) ? N',S Africa 2100-2125) 53333 at 2103 by Liblice Czech 1500 B',H' 1143 Kaliningrad Lithuania 150 W' La Coruna Spain 100 B',N,P,W' 1161Strasbourg IF.Intl France 200 H,N Charles Beanland in Gibraltar. BBC Orfordness UK 500 C,D,H,N',O,P,U,V 1179 Santiago Spain 10 H,N' A few evening broadcasts to Eu- Burg Germany 250 B',N' 1179 Solvesborg Sweden 600 D,H',N',O,P,W' rope were logged: RHC, Cuba 17.815 RCE-2 Madrid Spain 20 H' 1188 Kuurne Belgium 5 A',0 (Fr, Eng 1900-2100) SI0433 at 2030 in BBC-R.Wales Wrexham UK 2 B',D,M,P' 1188 Szolnok Hungary 135 H,N` Bodenseesender Germany 300/180 B',C',G',N' 1188 AI-Hiswah 1. Hereford; HCJB Quito 17.790 (Cz, Ger, Yemen 400 Barcelona Spain 20 N. 1197 VOA via Munich Germany 300 D,H,N`,P' Sw, Eng, Sp 1800-2230) 33344 at 2132 Marseille France 600 B',H',P 1197 BBC -R3 Enniskillen Ireland (N) 1 N by Chris Bazley in Rayleigh; VOFC via Hilversum -3 topic Holland 120 B',C,D,G,H,N',O,U,V 1197 BBC -R3 Bournemouth UK 0.5 0 Okeechobee 17.750 (Eng to Europe RNE-1 Sevilla Spain 250 B',H',N 1197 Minsk USSR 50 C',N 2200-2300) SI0444 at 2200 in Sheffield; Berlin Germany 250 I N' 1206 Bordeaux France 100 A',D,N' Aachen/Flensburg Germany 5 B',N' 1206 Wroclaw Poland 200 H' V. of the UAE in Abu Dhabi 17.855 (Eng Zamora Spain 5 B',K' 1215 BBC -R3 Lisnagarvey UK 10 N. 2200-0000) 45554 at 2340 in Wallsend. Tallinn Estonia 50 C. 1233 Melnik Czech 400 R. NewZealand Int. has returnedto Rennes 1 France 300 B',H,K,N',O,U 1242 Marseille France 150 N* the 15MHz (19m) band to reach the Langenberg Germany 200 B. 1251Huisberg Neth'Iands 10 N` Pacific areas, because many of their BBC -R4 Lisnagarvey Ireland (N) 10 C 1260 Valencia Spain 20 H',N' Norte Portugal 100 N' 1269 Neuminster Germany 600 H',D,G',N',P',W' receivers do not cover the 22m band. BBC -R4 Lots Rd London UK 0.5 B',C,D,M,O 1278 Strasbourg France 300 H',N* They now operate on 15.120 (Eng to Leipzig . Germany 5 C 1278 RTE -2 Dublin/Cork Ireland (S) 10 C,J',M,N',P Pacific 1800-2200). Some eveningsthey RTE -1 Cork Ireland (S) 10 A,B,D,N',0 1287 Litomysl/Liblice Czech 300/200H' were heard here. In New Radnor they Oviedo Spain 50 B,K',N 1296 Kardzali Bulgaria 150 0 Paris France 4 A,O,V were SI0333 at 1900. Some of R. Aus- 1296 BBC Orfordness UK 500 E',N' Poznan Poland 300 B. 1305 Rzeszow Poland 100 H. tralia's Shepparton signals have also RNE-1 Barcelona Spain 250 A',B',K`,N' W" 1305 Orense(RNES) Spain 5 N' been heard here:15.240 (Eng to Pacific Hilversum -2 Flevo Holland 400 B',D,G,H,K, 1314 Kvitsoy Norway 1200 D,H,N',(1,P`,V,W' areas 2200-0930) heard at 2200 by Tim N',O,P,U,V 1323 BBC Zyyi Cyprus 50 A' Bucknall in Congleton; 15.320 (Eng to 756 Brunswick Germany 800/200 B`,G`,H,K',N' 1323 R.Moscow via Leipzig Germany 150 H',N',P' Ravensburg Asia 2030-0800) 34433 at 0615 in 756 Germany 100 G' 1332 Rome Italy 300 D,H`,N' 756 Bilbao Spain 5 K. 1341BBC-UIst.Lisnagarvey Ireland IN)100 D,H',0 Wallsend; 15.160 (Eng to Pacific 2130- 756 BBC -R4 Redruth UK 2 0,0 1350 Nancy/Nice France 100 D,H',N' 1100) as 42222 at 2131 in Swanwick. 765 Softens Switz 500 B',N' 1359 Berlin Germany 250/100N. Most 19m signals to Europe reach 774 BBC -R4 Enniskillen Ireland (N) 1 N 1368 Manx R., Foxdale IOM 20 C,D,N' their target well. A typical rating for 774 RNE-1 San Sebastian Spain 60 B. 1377Lille France 300 C`,N',O,P',U 783 Djanet Algeria 5 A' 1386 Kaliningrad Lithuania 500 D,H',N,0 R.Japan via Yamata 15.325 (Eng 0700- 783 Burg Germany 1000 B,K',N' 1395 R.Tirana via Lushnje Albania 1000 D',K*,N' 0800) was SI0433 at 0730 in Hereford; 792 Limoges France 300 B',N',0 1404 Brest France 20 N',0 UAE R.Dubai 15.435 (Eng 1330-1400) 792 Sevilla Spain 20 B`,K 1413 RCE Zaragoza Spain 20 792 Al-Hiswah IYemen 750 L 1422 Heusweiler Germany 1200/600 D',G',H',N',P' Listener. 801 Munich Germany 420 B',H',N' 1431Dresden Germany 250 N. A: Leo Barr, Sunderland. 810 Berlin Germany 5 G' 1440 Marnach Lux'bourg 1200 D',K',N,O,P' B: Darren Beasley, Bridgwater. 810 SER Madrid Spain 20 B',G',N' 1449 Berlin Germany 5 N' C: Tim Bucknall, Congleton. 810 BBC-Scot.Westerglen UK 100 C,N,O,P 1449 Squinanzo Italy 50 N' D: Noel Carrington, Sutton in Ashfield. 819 Bordeaux France 20 B. 1467 TWR Monte Carlo Monaco 1000/400 D',H',K,N',P' E: Jim Cash, Swanwick. 828 Hanover Germany 100/5 B. 1476 Wien-Bisamberg Austria 600 N',P' F: Bill Clark, Rotherham. 837 Nancy France 200 B`,N',0 1494 Amman Jordan ? G: Tony Elkins, Bury St.Edmunds. 846 Rome Italy 540 B',H',N,O,P' 1494 Leningrad USSR 1000 D',H',N',P' H: Ron Galliers, N.London. 846 Moscow USSR 50 C. 1503 Stargard Poland 300 H',K',N',P' I: Alf Gray, Birmingham. 855 Berlin Germany 100 A',B',N' 1512 BRT Wolvertem Belgium 600 E',H',I',K', J: Francis Hearne, Bristol. 855 Murcia Spain 125 B,D,N' N',O,P',U K: Sheila Hughes, Morden. 864 Paris France 300 B',O,U 1521Cizatice Czech ? N' L: Rhoderick Illman, Thumrait, Oman. 873 AFN via Frankfurt Germany 150 B',E',G,N,P',W' 1521Kosice Czech 600 N. M: Robert Lawrence, Cheltenham. 873 R.Ulster,Enoiskilleo UK 1 C,N 1530 Vatican R., Rome Italy 150/450H',K',N',P' N: Eddie McKeown, Co.Down. 882 BBC -Wales Washford UK 70 B,C,D,G,H,J,M,N,O,P 1539 Mainflingen Germany 700 0: George Millmore, Wootton IOW. 891 Algiers Algeria 600/300B',C',H',N',P,W` 1566 Sarnen Switz 300 H' P: Sid Morris, Rowley Regis. 891 Huisberg Holland 20 B',G,N',O 1575 Burg Germany 250 N`,W' Q: John Parry, Northwich. 900 Milan Italy 600 A',B',C',H,N',W' 1593 Langenberg Germany 400/800C',D,G', R: Roy Patrick, Derby. 909 BBC -R5 Moorside Edge UK 200 0 K,N',P,W' S: John Robertson, Alnwick. 918 R.Intercont. Madrid Spain 20 B',N` 1611 Vatican R., Rome Italy 5 T: John Stevens, Melvick, N.Scotland. 927 BRT-1 Wolvertem Belgium 300 B',D,H,N',O,P',U U: Phil Townsend, E.London. 936 Bremen Germany 100 B',C',G',N,W' Note: Entries markedwere logged during darkness. All other entries V: Ted Walden -Vincent, Gt.Yarmouth. 945 Toulouse France 300 B',N' were logged during daylight or at dawn/dusk. W: Lee Williams, Birmingham.

Short Wave Magazine, November 1991 63 O/c*Itritg mod1(tolm Transatlantic DX Chart Freq Station Location Time DXer kHz (UTC) s-3r* USA 850 WHDH Boston, MA 0300 A 950 WPEN Philadelphia, PA 0405 A 970 WYNZ Portland, ME 0450 A 1020 KDKA Pittsburg, PA 0255 A 1050 WEVD New York, NY 0215 A 1090 WBAL Baltimore, MD 0150 A 1200 WKOX Framingham, MA 0520 A 1220 WKNR Cleveland, OH 0420 A 1430 WENE Endicott, NY 0350 A 1470 WLAM Lewiston, MA 0230 A S10444 at 1330 in Edinburgh; Voice of (Eng, Fr to Africa 1800-2000) 11431 at 1520 WWKB Buffalo, NY 0230 A Israel, Jerusalem 15.617 Web 0400- 1810 in Bridgwater; BBCviaWoofferton Canada 590 VOCM St.John's, NF 0150 A 2310, to USA) S10444 at 1335 in Win- 13.660 (Arto N.Africa 2000-2100)54444 620 CKCM Grand Falls, NF 0210 A chester and 15.640 )Heb, Fr, Russ, Eng, at 2042 in Gibraltar; WHRI 13.760 (Eng 640 CBN St.John's, NF 0420 A Yid 1800-2225) S10333 at 1925 by Alf to USA, Europe 1600-0000) S10444 at 670 CKXB Musgravetown, NF 0100 A 750 CBGY Bonavista Bay, NF 0430 A Gray in Birmingham; RNB, Brazil 15.265 2200 in Edinburgh; Voice of the UAE, 910 CHRL Roberval, PQ 0400 A (Eng, Ger 1800-?) 32432 at 1950 in Abu Dhabi 13.605 (Ar, Eng to N.Africa 920 CJCH Halifax, NS 0155 A 930 CJYQ St.John's, NF 0020 A Alnwick; VOA via Tangier 15.205 (Eng 2200-0000) 34343 at 2315 in Rayleigh. 050 CHUM Toronto, ON 0150 A 1700-2200) 43333 at 1915 in Morden; The 11 MHz (25m) signa is to Europe 140 CBI Sydney, NS 0420 A WWCR Nashville 15.690(Eng, Sp 1200- include HCJB Quito 11.835 (Eng 0700- 200 CFGO Ottawa, ON 0230 A 220 CKCW Moncton, NB 0150 A 0000) at 1920 in Derby; RCI via Sackville 0830( 44444 at 0735 in Alnwick; WCSN 320 CKEC New Glasgow, NS 0300 A 15.325 (Eng 1900-1959) at 1900 in Scotts Corner 11.705 (Eng 0800-1000) 380 CFDA Victoriaville, PQ 0220 A 410 CKSL London, ONT 0350 A Bridlington; Voice of Vietnam, Hanoi 33333 at 0813 in Rayleigh; UAE R.Dubai 470 CHOW Welland, ON 0400 A 15.010( Eng, Fr, Sp, G er 1800-2130)44444 11.795(Eng 1600-1640)33423 at1635in C. America & Caribbean 100 ZDK Granville R. St.Johns, Antigua 0420 A at 1942 in Sunderland; R.Denmark via Sunderland; R.Pakistan, Islamabad 190 WBMJ San Juan, Puerto Rico0150 A RNI Oslo 15.235 (Da 1930-2000) 53553 11.570 (Ur, Eng 1700-1800) SI0444 at 420 ACB 20 Panama 0600 A at 1942 in Bridgwater; SLBC Colombo, 1740in Macclesfield; R.Finland via Pori 570 Atlantic Beacon Turks & Caicos Its 0200 A? 610 Caribbean Beacon The Valley,Anguilla 0100 A Sri Lanka 15.120 (Eng 1830-2130(S10433 11.755 (Eng 1830-1900) in Bridlington; South America at 2030 in Sheffield; R.Beijing, China REEviaAganda 11.790 (Eng 1900-2000) 100 R.Globo Sao Paulo, Brazil 0540 A 280 ZYJ455 R.Tupi Rio, Brazil 0455 A 15.100 (Fr 1830-2130, also to Africa) S10322 at1900inBirmingham; 380 CB138 R.Colo Colo Santiago, Chile 0410 A 54444 at 2051in Gibraltar; R.Korea, R.Damascus, Syria 12.085 (Eng 2005- 420 HJBH Caricol Santa Marta, Colombia 0545 A Seoul 15.575 (Eng 2030-2130)S10232 at 2105, to USA) SI0332 at 2028 in 520 Ecos del Tomar Bogota, Colombia 0555 A 2110 in Bishops Stortford; WCSN Scotts Rotherham; R.Romania Int, Bucharest DXers Corner 15.665 (Eng 2000-2200)43333 at 11.940 (Eng 2100-2125(55555 at 2100 in A: Jim Willett, while at Dollar Law, Scotland. 2118 in N.London; Voice of the UAE in Brenchley; R.Yugoslavia, Belgrade EQUIPMENT USED Abu Dhabi 15.305 (Eng 2200-0000) 55555 11.735 (Eng 2100-2145)53233 at 2110 in at 2225 in Norwich; RTVM Tanger, Mo- Bishops Stortford; R.Beijing, China Leo Barr, Sunderland: Matsui MR -4099 + r.w. in loft. rocco 15.335 (Ar, Sp 0945-0100, also to 11.500 (Eng 2000-2200( 34343 at 2146 in Chris Bazley, Rayleigh: Panasonic RBF-40L + 20m wire W.Africa) 43333 at 2330 in Durham. Swanwick; AIR via Aligarh 11.620 (Hi, Charles Beanland, Gibraltar: Sangean ATS-803 + a.t.u. + r.w. Those to other areas include RTL Eng 1845-2230) S10444 at 2200 in Shef- Darren Beasley, Bridgwater: Philips D2935 + loop or a.t.u. + 10m wire. Luxembourg 15.350 (Eng, Fr to E.USA field; R.Sofia, Bulgaria 11.660 (Eng 2200- Kenneth Buck, Edinburgh: Lowe HF-225 + r.w. in loft or loop. 24hrs) 34333 at 0530in Oman; 2230) heard by Peter Vlietinck in Tim Bucknall, Congleton: Triumph 100D or Unitra D-401 or Boots SRR 33T. R.Romania Int, Bucharest 15.335 (Eng Royston; Voice of Turkey, Ankara Noel Carrington, Sutton in Ashfield: Philips D2999 + r.w. to Pacific areas 0645-0715) S10322 at 11.710 )Eng 2200) heard at 2200 in Her- Jim Cash, Swanwick: Kenwood R5000 + trap dipole. 0715 in Bristol; SRI via Schwarzenburg eford; R.Japan via Moyabi 11.735 (Eng Bill Clark, Rotherham: Sony ICF-SW-7600 + built-in whip or r.w. John Coulter, Winchester: Yaesu FRG -7 + r.w. 15.570 (Eng, Fr, Ger, It to Pacific, Asia 2300-0000), at 2300 by Julian Wood in Antonio De Abreu -Teixeira, Durham: Sony ICF-2001D or ICF-SW 7600 + 9.5m wire. 1100-1300) 43343 at 1105 in Co.Down; Elgin; R.Vilnius, Lithuania 11.790 (Eng David Edwardson, Wallsend: Trio R-600 + inverted V trap dipole. R.Tashkent,Uzbek 15.470 (Engto S.Asia 2300) 44554 at 2306 in Wallsend. Tony Elkins, Bury St.Edmonds: lcom R-9000 + a.t.u. + 2 co -phased 5RV. 1330-1400) 45333 at 1330 in Brighton; Some morningsthe 9MHz(31m)sig- David Forester, Newcastle-under-Lyme: Yaesu FRG -7 + r.w. R.Portugal Int, Lisbon 15.425(Engto M. nals from R. New Zealand to Pacific Ron Galliers, London: Philips D2935 + a.t.u. + 30m wire. East, India 1600-1630)Si0444at 1630 in areas have reached us. Their broad- Alf Gray, Birmingham: Codar CR70 + PR30 + a.t.u. + Ex -Army whip. Macclesfield; R.NederlandsviaTalata caston9.700 (Eng 0630-1110)was24333 Simon Hamer, New Radnor: Lafayette HE30/Grundig S1400/Sony ICF-2001D + a.t.u. + Volon 15.570 (Eng to C/S.Africa 1830- at 0730 in Norwich. Later, R. Austral- r.w. or loop. 1925) S10434 at 1846 in Rotherham; AIR ia's Carnarvon broadcastto Asia 9.860 Robin Harvey, Bourne: Matsui MR -4099 + s.w. loop. via Bangalore 15.265 (Eng to Pacific (Eng 1800-21001 was heard here. In Francis Hearne, Bristol: Sharp GFA3 cassette radio + r.w. 2045-2230)34433 at 2105 in Brenchley; Bishops Stortford it rated S10222 at Sheila Hughes, Mordent Sony ICF-7600DS; Panasonic DR48 + 15m wire. BBC via Ascension Is 15.260 (Eng to S. 2057. At least 3signalsfrom S.America Rhoderick !liman, Thumrait, Oman: Sony ICF-7600DS + whip or 23m wire Am 2000-0330)33323 at 2220 in Bourne; may also be heard here: R.Sucesos, Cyril Kellam, Sheffield: Sony ICF-7600DS + AN -1 or 25m wire. R. Korea, Seoul 15.575 (Eng to E.USA Tariba, Venezuela 9.700, rated 55555 at Bryan Kimber, Hereford: Zenith R7000 or Realistic SX190 + 20m wire. 0000-0100) at 0000 in Rowley Regis. 2255 byTony Elkins in Bury St Edmunds; Robert Lawrence, Cheltenham: Hitachi cassette radio + 20m wire. Although for other areas, R. Aus- R.Nacional, Paraguay9.735)Spto S.Am Eddie McKeown, Co.Down: Tatung TMR-7602. George Millmore, Wootton, IOW: Tatung TMR-7602 + loop or Racal RA17L + v.l.f. tralia's 13MHz (22m) signals often 0800-2300), logged as 34543 at 2301 in converter + r.w. reach the UK. The Shepparton signals Wallsend; R.Universo, Curitiba, Brazil Sid Morris, Rowley Regis: Kenwood R5000 + 31m wire. to Pacific areas 13.605(Eng 1700-2130) 9.565 (Port to S.Am 0900-0200) which John Nash, Brighton: Kenwood R5000 + Datong AD370. were S10433 at 1700 in Birmingham; to peaked 43333 at 0045 in Durham. Sergei Olejnik, Kalush, Ukraine: (shim -003 + 70m wire. S.Asia via Carnarvon 13.775(Eng 1530- The 31m signals to Europe include Fred Pallant, Storrington: Trio R2000 + r.w. in loft. 2100) was 52333 at 1820 in Swanwick. AWR via Sines 9.670 (Eng 0800 Sun John Parry, Northwich: Realistic DX -400 + 33m wire. Some broadcasts inthis band come only) 44444 at 0800 in Morden; Roy Patrick, Derby: Lowe HF-125 + 44m wire. from DW via Julich 13.790 (Eng to R.Nederlandsvia Flevo9.715(Eng 1130- Don Phillips, Bridlington: Yaesu FRG -8800 + a.t.a. + r.w. W.Africa 0600-0650) 33233 at 0645 in 1225) SI0555 at 1155 in Hereford; Philip Rambaut, Macclesfield: Int Marine Radio R.700M + r.w. N.London; WSH B Cypress Creek 13.760 R.Tirana,Albania 9.585(Eng 1530-1600) John Robertson, Alnwick: Lowe HF-225 + ENV r.w. (Eng to Australia 0800-1000) SI0111 at 43444at1530in Brighton;VOlRITehran John Sadler, Bishops Stortford: Realistic DX -400+SW Loop. 0808 in Macclesfield; SRI via Softens 9.022 (Eng, Fr, Ger, Sp, Ar 1800-2230) Chris Shorten, Norwich: Matsui M- 4099 + 10m wire. 13.635 (Eng, Fr, Ger, Itto Pacific areas, 54454 at 1922 in Swanwick; R.Sweden John Stevens, while in Melvick, N.Scotland: Icom R-70 + r.w. Asia 1100-1430) 44344 at 1106 in via Horby 9.655 (Fr, Sp, Eng, Ger, Sw Darran Taplin, Brenchley: Yaesu FRG -7700 + FRA-7700 or FRT-7700 + Zepp. Co.Down; R.Austria Int, Moosbrunn 1900-2130) 44444 at 1950 in Brenchley; Phil Townsend, London: I.f. converter + Lowe SRX-30 + loop or a.t.u. + r.w. 13.730 (Ger, Fr, Eng, Sp, Ar to Europe Voice of Turkey, Ankara 9.445 (Eng Ted Walden -Vincent, Gt.Yarmouth: Grundig Satellit 1400L + r.w. Jim Willett, Dollar Law, Scotland: See m.w. transatlantic DX text. 0400-1655) SI0233 at 1405 in E.London 2000-2030) 32433 at 2010 in Co.Down; Lee Williams, Birmingham: Sony ICF-2001D + built-in whip. and 13.730 (Ger, Fr, Eng, Sp to Africa R.Pyongyang, N.Korea 9.325 (Sp 2000- Julian Wood, Elgin: Kenwood R2000 + Yaesu FRT-7700 a.t.u. + 6m wire. 1700-2100) 44344 at 1945 in Bourne; 2050) 22232 at 2035 in Sunderland; R.Pakistan, Islamabad 13.665 (Eng to R.Kiev, Ukraine 9.865 (Eng 2100-2200) M.East1600-1630)at1600 in S10433 at 2100 in Sheffield; R.Beijing, at 0710 in N.London; AIR via Aligarh Three 6MHz (49m) signals from Bridlington; UAE R.Dubai 13.675 (Eng China 9.880 (Eng 2200-7) 54554 at 2200 7.412 (Engto Europe 1830-1945) S10444 S.America were heard: Brasilia, Brazil to Europe 1600-1640) 23442 at 1632 in in Bridgwater; R.Sofia, Bulgaria 9.700 at 1830 in Winchester; R.Japan via 6.180 (Port 0900-0100) at 2235 by Sergei Wallsend; KHBI Saipan, N.Mariana Is (Eng 2200-?) S10333 at 2230 in Bristol. Moyabi 7.140 (Eng to S.Africa 1900- Olejnik in Kalush, Ukraine; R.G lobo Rio, 13.6251Engto S.Asia1400-18001S10322 Among the 7MHz (41m) logs were 1930) S10333 at 1915 in Hereford; Brazil 6.030 (Port 0900-0400) S10343 at at 1640 in Rotherham; BRT via Wavre WHRI 7.315 (Eng to E.USA 0000-1100) R.Korea, Seoul7.550)Kor, Ar, Engto M. 2308 in New Radnor; R.Nac. Buenos 13.675 (Eng to Europe 1730-1755)42322 S10333 at 0631 in Macclesfield; WYFR East, Africa 1700-2130) 34333 at 1748 in Aires, Argentina 6.060 (Sp 0100-1100) at 1732 in Oman; RCI via Sackville 13.670 7.355 (Eng to Europe 0600-0800)33443 Oman and 44444 at 2055 in Norwich. 22222 at 0055 in Durham. 64 Short Wave Magazine, November 1991 ) lbw riff 'Lax /h /r/i/~ Andy Emmerson G8PTH 71 Falcutt Way, Northampton NN2 8PH

If a camera is unavailable, a home computer can be pressed We continue our begin- into service as a picture source. ner's guide to amateur television Simple graphics can be quite equipment and techniques, effective, as in this picture from Holland, but fine detail will be starting off with ways of lost in weak signals and any producing pictures. static display soon gets boring.

Video Sources

From a transmitting viewpoint, virtually any video device is ideal for amateur television, so long as it puts out a clear picture. would use a 10dB gain horn and Because of the additional cost of a modified Astra satellite LNB the transmitting apparatus, most and receiver. These will cost you ATVers have to consider their between £50 and £70 as rally budgets and may not spend a bargains. Even allowing for extra fortune on the camcorders that components, power supply and a some video enthusiasts might smart instrument case, you consider first. ATVers are also should still have change out of good at getting bargains and ers produce a TV picture to the on -Trent, but others are £100, which is not something you seeking out and refurbishing normal broadcast standards and proposed in Bristol and North- can say for most amateur radio second-hand equipment, so not any displays involving small text ampton. Looking a little further, it modes. everyone uses the latest model. will probably not be easy to is highly likely that 3cm will Obviously you will need some Overall, the VHS format has the make out 'at the other end'. In become the band for amateur skill to do this, but all the popularity edge on 8mm, and the any case, computer graphics television and I expect every information is available (or soon compact size of the VHS -C look pretty boring after 30 district to have a 10GHz repeater will be) in magazines likeCO -TV camcorders has made them the seconds, nothing like a live in ten years time. andVHFCommunications.As favourite with recent purchas- camera picture. People also Why is this? Simply because interest increases, no doubt ers. build test signal and caption whole system is cheap and dedicated conversion kits will People from a professional generators from integrated attractive, while avoiding the come onto the market. Note that background prefer the stability circuits: these are compact and problems of other ATV bands. generally a lower gain antenna of the shoulder -mount full-size handy. The so-called Cropredy The 430MHz band is most is used for receiving: this is VHS cameras, and there are design can be had from Cirkit people's first choice, but it is because higher gain means plenty of second-hand bargains and there are also third -party crowded and quite expensive to narrower beamwidth, which is among these. Of course, you add-ons and programmed chips equip yourself for. At 1296MHz not ideal as a search antenna. have to ask for them - any dealer available for this. there is far less amateur activity, On the other hand, if you are would prefer to sell you a new but the band is just as crowded always going to be receiving a machine but usually has some ATV on the Cheap with radar transmissions in some fixed transmitter (such as a trade-ins which he'll sell. districts; it is also just as repeater), a high gain antenna Cheaper than all the foregoing Surprisingly perhaps, the lowest expensive to get started. But on might be all right. Normal options are old black -and -white cost entry to amateur television 10GHz none of this applies, and satellite TV receivers are fine, surveillance cameras, which is at 10GHz (also known as 3cm you can get started for well but they generally need to have often give a better picture than or X -Band). Although this is under £100. The usual roof -top their video gain increased, any colour device. At rallies they microwave territory, almost as clutter of chimneys and trees, according to Dave. should not cost more than £20 or high in frequency as satellite TV, which absorb your precious r.f. Of course, there is no £25, though you may have to pay the 'fall -out' from this satellite so effectively at 1296 and objection to a more completely extra for a decent lens. Quite market has made this the 430MHz, are less significant at home-brew system, but this is few people place a surveillance cheapest band to choose. An 10GHz, simply because the not really the province of the camera on a wall bracket (just added bonus is that the equip- signals are reflected rather than newcomer. I'll describe some like the surveillance cameras in ment is extremely compact and absorbed. ideas for a more state-of-the-art shops): if this is aimed looking uses flea power, a truly eco - Dave G4NJU, who is a keen system next time, but be down on the operating position friendly band! exponent of this band, explains reassured that it will be entirely in the shack, you can be seen Of course, the activity on this how cheap it really is. A typical coaxial and solid state: the old while you talk to your DSO band is confined to places transmitter would use a Plessey days of klystron tubes and partners. where there is a 3cm repeater burglar alarm head (cost £5 or waveguide 'plumbing' are over! There are other ways of and some keen types who take £10), which you would equip with If there are any topics you generating pictures apart from their equipment to hilltops for a compact 20dB gain horn would like covered in this cameras. One way is to use a portable operation. So far, we antenna which you can make column, please write in and tell home computer, but this may have 3cm TV repeaters only in yourself easily from printed me. Feedback is definitely have problems. Not all comput- Milton Keynes and near Burton - circuit board. For reception you encouraged! Short Wave Magazine, November 1991 65 dressierTHE LARGEST U.K. ICOM DEALER COMMUNICATIONS LTD. Authorised Kenwood, Yaesu & Standard Dealer DRESSLER ACTIVE ANTENNAS Icom IC -R1 OGK FRG 8800 or ARA SPG\ ICOM R72 or ARA60 £325.00 PRP E385 1500 G\G-FFER Kenwood R2000: ACTIVE ANTENNA 50kHz - 60MHz 50MHz - 1500MHz AOR YAESU WITH LIMITED Frequency Gain PERFORMANCE 50-1000 11.5dB AOR 3000 £675.00 FRG 8800 HF Receiver £585.00 UP TO 100MHz 100 -1500 11.0dB AOR 2000 £259.00 FRG 9600 50-950MHZ . £500.00 £163.00 AOR 2800 £395.00 R5000 HF Receiver only£895.00 Exciting new R2000 £585.00 'N' Connection Shortwave Active NRD - JRC LOWE á5 £429.00 &MI Antenna Now fully 535 + ARA 60 £1075.00 SONY 940mm High tuneable 535 only £975.00 ICF SW 7600 £145.00 64mm Diameter interface. All accessories avaialable. ICF 77 Available Soon Complete with Intercept cable + PSU & STANDARD point + AX 700 £545.00 Interface 21dBm FAIRMATE £163.00 Typical. HP200 £269.00 Yupiteru MVT7000 £275.00 SALE 191 FRANCIS ROAD SPECIAL OFFERS SHINWA ' Full Remote LEYTON Icom R71 + ARA 60 £875.00 E10 6NQ LONDON Icom R7000 + ARA 1500.. £1015.00 Control Icom R7100 + ARA 1500...£1050.00 OPEN MON-FRI 9.0-5.30 s Icom R9000 + ARA 60 &1500£4000.00 25999.995MHz OPEN SAT 9.30-4.30 ROOl PHONE: 081-558 0854/081-556 1415 200 Channel FAX: 081-558 1298 Memory TELEX: 8953609 LEXTON G 24hr Hotline ansaphone 081-558 0854. Prices correct at time of going to press. Please phone for latest quote.Or contact your local agent any time on £299 the following number: Terry (Biggleswade, Beds.) 0767 316 431. ALL SPECIAL COME AND VISIT OUR TOTALLY "WANAN TNAN,AXI \I'Itl ElPRICES REFITTED LONDON SHOWROOM

BREDHURST ELECTRONICS LTD. 6 édhul-s" High St, Handcross, W. Sx. RH17 6BW electronics (0444) 400786 SITUATED AT SOUTHERN END OF M23 - EASY ACCESS TO M25 AND SOUTH LONDON RECEIVERS 70CMS TRANSCEIVERS ANTENNA BITS P&P LOWE HF150 £TBA Kenwood TM441E £325 PB1 1:1 Baiun 2kW P.E.P £17.95 £2.00 Lowe HF225 £429 Kenwood TH47E £275 LC160 160 Mtr Wire Antenna Shortener (Pairslf22.95 £2 00 Icom ICR71 £875 Yaesu FT790RII £499 CHALLENGER DX -VI Icom ICR72 £689 Yaesu FT811 + FNB10 £274 LC8080 Mtr Wire Antenna Shortener (Pairs) C23.95 £2.00 Kenwood R2000 Yaesu FT712RH £359 T1521MHz Traps 1kW (Pairs) £37.90£2.00 Yaesu FRG8800 £649 MULTIBAND GAP Icom IC4GE £289 T2014MHz Traps 1kW (Pairs) £37.90£2.00 Yaesu FRV8800 V F. Converter £102 Kenwood R5000 £895 Icor11 IC4SE £304 ANTENNA T407MHz Traps 1kW (Pairs) £39.90£2.00 Icom IC448E £349 T803.5MHz Traps 1kW (Pairs) £39.90£2.00 Icom IC4SRE HF TRANSCEIVERS £445 16SWG Hard Drawn Copper Wire 150 Mtrs) £12.95£2.50 Kenwood TS950S £2995 Small Ceramic Egg Insulators (each) £0.65 DUAL BAND £0.30 Kenwood TS940S £1995 Large Ceramic Egg Insulators (each) £0.85£0.40 Kenwood TS850S £1325 TRANSEIVERS * Launches RF from an Kenwood TS440s 30012 Slotted Ribbon Cable (per mtr)£0.58£0.10 £1150 Kenwood TM731 E £675 elevated GAP. Kenwood TS690s £1325 45002 Slotted Ribbon Cable (per mtr) £0.50£0.10 Kenwood TM702E £455 Yaesu FT990 £1849 Yaesu FT767GX £1599 Yaesu FT47OR + FNB10 £424 * Eliminates earth loss. Yaesu FT747GX £659 Yaesu FT736R £1359 PALOMAR PRODUCTS Icom IC765 £2550 'corn IC3220E £510 * Comes pre -tuned. R -X Noise Bridge for antenna checks Icom IC735 £1000 Icom IC2400E £649 Icom IC725 £779 Icom IC2500E £689 * Uses only 3 radials up to 100MHz £59.95 Receiver Preamp - 1.8 to 54MHz. loom IC726 £1015 Icom IC24E £385 @ 25 feet. Up to 20dB gain Ten Tec Agronaut II £1295 Standard C528 £387 £119.95 Transceiver Preamp - R.F. Switched * Total bandwidth on 40, - up to 20dB gain £149.95 2M TRANSCEIVERS SCANNING RECEIVERS 20, 15, 12, 10, 6, Super Snooper - vertical indoor antenna for SWL £39.95 Kenwood TH27E £254 Icom ICR7100 £1050 Icom ICR1 2 metres, 130kHz on Loop antenna - Directional indoor Kenwood TH2O5E £178 £369 Icom ICR100 £510 antenna 6 loop ranges phone for details Kenwood TH215E £178 80 metres. AOR AR2000 £259 Tuner Tuner - ATU adjustment without Kenwood TR751E £610 AOR AR3000 £765 transmitting £99.95 Kenwood TM241E £295 AOR AR2500 £419 SWR & Power meter - LED display Yaesu FT411 + FNB10 £260 AOR AR2800 £395 SWR without adjustment Yaesu FT29OR11 £429 £229.00 20W 200W 2000W PEP £129.95 Yaesu FT26 + FNB25 +NC28C £245 2W 20W 200W 2000W PEP expanded Yaesu FT212RH £325 ANTENNA TUNER UNITS display £189.95 coin IC2GE £269 FRT7700 £60 VLF converter - 10 - 500kHz com IC229E £299 FC757AT £357 converter £79.95 GOODS NORMALLY DESPATCHED WITHIN Baluns 350W PEP 1.7 - 30MHz £23.95 each corn IC275E Inc PSU £1090 AT230 £213 24HRS - PRICES CORRECT AT TIME OF GOING TO AT250 £374 1:1,1:5,2:1,3:1,4:1,5:1,6:1, corn IC2SE £279 PRESS - E&DE 7.5:1, 9:1, 12:1, 16:1 ICAT150 £335 corn IC2SET £299 MAIL ORDER & RETAIL Baluns - up to 6kW PEP phone for details coat IC2SRE £429 BW VS300A Transmatch £129.95 BREDHURST ELECTRONICS LTD HIGH ST, HANDCROSS, W. SUSSEX. RH17 6BW (0444) 400786 Open Mon -Fri 9am-5pm except Wed gam-12.30pm. Sat 10am-4pm 66 Short Wave Magazine, November 1991 A NEW TOOL FOR A NEW TECHNOLOGY

Spectrum Planning? Surveillance? Management? Activity Monitoring? System Engineering? Why not upgrade your Scanning Receiver with the New SCANMASTERTM II Controller? Scanmaster'" IIis a "black box' which plugs into the Remote Socket on your Scanning Receiver and takesover control of the Radio. No programming is required to use SM2`Mas it has its own powerful commands to perform Searching, Memories, Remarks, Logging, Activity Reports, and many other things. It generates INFORMATION and you can control what sort and how. This information can be uploaded, downloaded, printed, stored, etc. You talk to SM2''with a Terminal via an RS232 Serial Port. This would usually be ANY Computer runninga simple terminal/comms program. Anything to or from the terminal is automatically stored inspare memory, backed with a lithium battery, and can be viewed at any time, even if SM2'M has been turned off fora while. SM2'M uses the latest microprocessor technology and is designed to be User Friendly. SM2'M has itsown Clock/Calendar with a lithium battery so it keeps the date/time even when turned off. SM2'M has a powerful Schedulerso that jobs can be set up to run on a certain date/time, at date/time intervals, for a date/time duration,or for a number of times. SM2'M runs from 12V D.C. and is ideal for vehicle or portable use. It is LOW-COSTso every Radio Engineer should have one! S M 2 designed u pg rad a b l e, and will run many

different radios with just a change of software and connecting ScanmasterTM II Plug-in Boards leads. It will accept Plug -In Boards to further expand its SM2'"isable to take extra internal plug-in boards & software power and usefulness. Once you have used SM2'M you will111 packages to further expand its power and usefulness. All wonder how you ever used a Scanning Receiver without it H111 boards exceptROMCARD"contain their own operating software and will work with any of the main SM2'"software packages thereby allowing the various boards to work with

Powerful Activity Reports User Friendly Commands # any Scanning Receiver supported by us. Over 1300 Memories Large Memory - Battery

Clock/Calendar (Lithium) Remote/Unattended Use Available Now...

Versatile Lockouts Parallel Printer Port ROMCARD'M enables SM2-"to hold up to 8 different soft-

Output for Databases Status Indicator Panel ware packages so thatSM2+ROMCARDcan drive up to 8 (Comma Delimited) Many Search Bands different Scanning Receivers with only a change of connect- Powerful Scheduler Tape Recorder On/Off ing leads.Upon performing a cold start.SM2'"isable to Assign Remarks i'detect ifROMCARD" isfitted and if so, it displays all the Extensive User Manual software packages fitted onROMCARD"on a menu for Low cost, easy to use Takes Plug -In Boards user selection. Supplied with one software package and set Sophisticated Logging : P.C. Upload/Download of connecting leads for £49.99 Software available for: Many more features !! Ask for more information. AR3000 AR2002 CHASE IC -R7000 IC -R9000 FRG9600 SM2'M is supplied complete with connecting leads and a software Available Soon!! package fitted to drive one the following Scanning Receivers: TON ECARD `' is able toDecode & Encodea variety of AR3000 AR2002 CHASE IC -R7000 IC -R9000 FRG9600 signalling tones includingDTMF. , CTCSS & (Upgrades are available from time to time) 1111 FFSK.(MPT1317. etc) and also decode and action signalling protocols such asTRUNKING(MPT1327. etc),JRC Band, How to Order: (Specify type of Receiver & Computer) BANDIII,etc.SM2+TONECARDcan drive a transceiver if Send Cheque, Bank Draft, or Mastercard/Access/Visa No. & you want.SM2+TONECARDcan control more than just Exp. Date. Official Orders accepted from Govn't, Education, Scanning Receivers! Large Co.s. etc. JRC ROM- is an optional software package forTONE- :? CARDand is tailor made to support the newJRC Band SpecialPrice....£249.99 11 signals used by the Gas & Elect. Co.s. Many powerful Delivery: Ex Stock, subject to availability features for diagnostic and engineering uses. 28 Day Money -Back Guarantee if not entirely satisfied. CELLCARD'M contains the same modem/filter chipset Life -Time Service Guarantee (Subject to conditions) as a cellular telephone andSM2+CELLCARD"can decode the signalling protocols used on the UKTACSsystem and optionally, theAMPSsystem. It can decode data and com- II and can do channel hopping and other things. CELLCARD"can be used as a powerful diagnostictool and EM is available to AUTHORISED USERS ONLY !! LIMITED VISA SCANMASTER'M I ?? 51 High Street, Portland, Dorset The Old Original. still going strong and still available for the DT5 1 JO, England Overseas AR2002, IC -R7000 & FRG9600 Phone: (0305) 826900 Agents Wanted for only £153.26

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68 Short Wave Magazine, November 1991 IF YOU ARE THINKING OF BUYING A NEW SCANNER... MAKE SURE YOU RING US FIRST FOR THE BEST DEAL FAIRMATE HP2000 ...£? AOR2000 £? JUPITER £? BEARCAT £? Part Exchange Welcome...Part Exchange Welcome...Part Exchange Welcome...Part Exchange Welcome SANGEAN ATS 80 SKY SCAN (Direct Kev-in World Receiver with Desk Top Antenna Quartz Alarm Clock Timer) Model Desk 1300 SPECIFICATIONS & FEATURES Built and designed for use with *150-29.999 continuous tuning with no gaps. Phase locked loop -double conversion Superheterrxiy nc scanners. Coverage: 25 to 1300MHz * Full Shortwave/AM/SSB 150-29999kHz No Gaps! + FM 87.5 - 108 Mono/Stereo * Five Tuning Functions: Direct Press Button Frequency Input Auto Scanning. Manual Scanning Memory Recall and Total height - 36ins - 9ins at widest Manual Tuing Knob * Built-in Clock and Alarm. Radio turns on automatically at preset time and point. Comes complete with 4 metres frequency. * Large digital frequency display.* Fourteen Memories -Nine memory channels for your favourite station frequencies. Last setting of mode and waveband stored in 5 memories. * Direct press - of RG58 coax cable and BNC connector fitted. Ideal indoor - high performance antenna and can also be used as acar antenna when your car isstatic. REMEMBER YOUR SCANNER IS ONLY AS GOOD AS YOUR ANTENNA SYSTEM! £49.00 + £3.00 p&p. SKY SCAN V1300 Antenna button Access to all 12 Shortwave broadcast bands. * Tao power sources - batten or AC mains adaptor. * General coverage of all a.m. bands in LW/MW/SW (Dedicated Broadcast Band Coverage Most discones only have horizontal on all versions) Plus of course the f.m. band for quality sound broadcasts in headphone stereo. * elements and this is the reason that SLEEP Function turns the radio on or off after an adjustable time of 10-90 minutes. * Separate BASS and TREBLE controls for maximum listening pleasure. * External antenna jack for better reception. they are not ideal for use with a * Adjustable r.f. GAIN control to prevent overloading when listening close to other strong stations scanner. Most of the transmissions or if there is interferenc. * New improved wide/narrow filter I6/2.7kHz) * b.f.o. control (Beat Frequency Oscillator) enables reception of SSB/USB/LSB (single side band) and c.w. (Morse Code) that you are likely to receive on transmissions. * Illuminated display to facilitate night-time use. * Designed for both portable and your scanner are transmitted from Desk Top use. * Five dot LED Signal Strength Indicator. vertically mounted antennas. The DIMENSIONS: 29.2cm x 16.0cm 111.5in x 6.3in x 2.36in) OUTPUT: 1200mW (10% THDI WEIGHT: 1.7kg 13.751ós) Without batteries. Wide/Narrow Sky Scan V1300 discone has both Filter Switch. vertical and horizontal elements for maximum reception. The £99.95 + £5 check, test and P&P. V 1300 is constructed from best qualitystainlesssteeland Short Wave ATU will improve your shortwave aluminium and comes complete antenna £39.95+£3.00 P&P with mounting pole. Designed and Short Wave Long Wire complete built for use with scanners. £10.95+£3.00 P&P OR £49.95 ATU and Long Wire Normal Price £50.90 Package price: £48.00 +£4.50 P&P , + £3.00 p&p. AR300 XLAerial Rotator and control. Max Load: 100lb£39.95 + £2.95 AR201Rotator Support Bearings provide additional support SKY SCAN for long aerials. £15.00 +£1.50 P&P. MAGMOUNT Mk II

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t 69 AR1000/FAIRMATE SIDEBAND MEDIUM WAVE LISTENERS ADDS USE/LSE MODES TO YOUR EXISTING SCANNER. A READY BUILT UNIT FULLY TESTED AND COMPLETE WITH DO YOU ENJOY DXING THE MEDIUM AND LONG WAVE BANDS? INTERFACE LEAD AND INSTRUCTIONS. POWERED BY THEN MEDIUM WAVE NEWS IS FOR YOU. THE ONLY SPECIALIST INTERNAL NICADS OR OPTIONAL MAINS ADAPTOR. MAGAZINE FOR THE MW/LW LISTENER IS AVAILABLE BY CONTINUOUSLY VARIABLE COVERAGE. NOT TIED TO 5kHz SUBSCRIPTION FROM: THE MEDIUM WAVE CIRCLE, STEPS. £49.95 inc p&p. 137a HAMPTON ROAD, SOUTHPORT, MERSEYSIDE PR8 5DY (SAE for full details. or for sample copy of magazine send 60 pence in stamps or 2 IRCs) SIGNAL STRENGTH METER SMALL COMPACT DESIGN. USE FREE STANDING OR CLIP TO THE SIDE OF YOUR SCANNER. POSSIBLE USES INCLUDE INSTANCE AND DIRECTION MEASUREMENT FOR CLEARER SCANNER MODIFICATIONS IDENTIFICATION OF SIGNALS AND OPTIMISING OF AERIAL Turbo -charge your scanner with a little help from RADIO RESEARCH SYSTEMS £23.95 inc p&p. AR -1000/2000 - Fairmate HP -100-200 FULL Coverage Modification 0.5-1300MHz with NO GAPS! - Why pay more ??? £5.00 WRITE FOR FURTHER DETAILS SAE PLEASE CHEQUES Customising Packs for REALISTIC PRO 2004. 2005. 2006 & 2022 Packed with Modifications for your scanner (Please statemodep. £5.00 POs TO: S -Meter Driver for REALISTIC PRO 2004m 2005 8 2006E 17.50 400 Channels upgrade for the REALISTIC PRO 2004 Electronics5 Braunston Place, Rugby KIT £12.50 AUTO -VOX BUILT £25.00end aAE 1 rfII( 4. it.n( (riced all ourc.nner LI(,rades. RGW Warkwichshire CV22 5JZ RADIO RESEARCH (SWM), 3 Pasture Close, Whitmore, StaffsST5 5D0

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Full Results of the Practical Wireless 144MHz QRP Contest in the December issue.

* Constructional -The PW Challenger * Also featuring - Simple 3.5MHz Transmitter * Antennas -Fred Judd G2BCX Looks At * Packet Panorama Long Wire Multi -Band radiators. * Satellite Scene * Special offer -Buy A Three Band VHF * Getting Started - Antenna And Discover The Delights of 50, 70 and 144MHz. The Practical Way * Reviews - Yaesu FT990 HF Transceiver * CB High&Low * Plus -Christmas Subscriptions & Amateur * Competition Corner Radio Christmas Gifts Offer.

AND DON'T FORGET TO DIAL WIRELESS -LINE and there's lots more in your ON 0898 654632 FOR THE LATEST NEWS OF PROPAGATION, DX, SATELLITES, SPECIAL EVENTS, RALLIES, ETC. action -packed BULLETINS UPDATED EVERY SATURDAY. Calls charged at 36p per minute off-peak. 48p per minute peak. Practical Wireless, on sale For subscription details see pane 63 or write to the address below: PwPublishing Ltd. Enefco House, The Quay, POOLE, 14 November 1991. Dorset BH151PP Tel:1O2O21678558 Fax:1O2O2)666244

70 Short Wave Magazine, November 1991 THE VINTAGE WIRELESS BOOK LISTING Published regularly containing 100s of out -of -print. old and collectable wireless, TV and amateur radio books/magazines etc. Send four first class stamps for next issue or £2.50 for next four issues. WANTED: Pre 1960 Wireless. amateur radio and TV books and magazines. NEW PUBLICATIONS: Weather The Government Surplus Wireless Equipment Handbook. Facsimile reprint. Gives detailed information and circuit diagrams plus photos for Biritsh and American receivers, transmitters and test equipment etc. Large format. Incorporated is a surplus/commercial cross referenced valve and transistor guide. Price £13.75 including postage. The HF Band Frequency List. This extensive volume covers the h.f. spectrum from 2- Satellites 30MHz and gives details of transmissions outside the amateur bands including details of time schedules, plus comprehensive RTTY details. Price £7.95 including postage. Timestep have been producing inexpensive weather satellite SECRET WARFARE. THE BATTLE OF CODES AND CIPHERS By Bruce Norman. A detailed outstanding work with emphasis on the development of modern intelligence and the use equipment for 7 years. Following our success in both the UK of codes and ciphers. Throws light on top secret strategies of code breaking. Includes a and North American education market, we are now bringing history of codes. Clear and concise, analysis. Extensive use of diagrams. One of the few our expertise to the amateur satellite user. All of our equip- books on cryptography. Previously unpublished material. Brand new. £4.95 including ment is designed, built and fully supported in Britain, by post. Telephone orders accepted. Timestep engineers. CHEVET BOOKS (Dept SW) VISA ®157Dickson Road, BLACKPOOL FY1 2EU Tel: (0253) 751858 Lawrence Harris uses Timestep equipment for his column in Short Wave Magazine. Les Currington who received the first Chinese Feng Yun image and presented it to Chinese Diplo- mats, also uses Timestep equipment. PCSAT Ill ALYNTRONICS This innovative package will receive NOAA, METEOR, OKEAN, 129 CHILLINGHAM ROAD. HEATO\. FENG YUN, METEOSAT, GOES and GMS. All images are received NEWCASTLE-UPON-TYNE NE6 5XL TEL: 091-2761002 automatically on any PC with CGA, EGA, VGA or SVGA display. THE ONLY AUTHORISED DEALER IN THE NORTH-EAST FOR o Zoom, Pan, Contrast Stretch, False Colour, and Laser Print are just some of the features this system offers. Extensive filtering and a precision A -D are used on an internal PC Half ICOM&YAESU Card, for superior image quality. WE ALSOSTOCK MANY OTHER ITEMS OF EQUIPMENT FROM Animation from Meteosat is no mere gimmick! The atmos- MFJ * BUTTERNUT * CUSHCRAFT TONNA * DIAMOND*AOR BEARCAT * FAIRMATE * JUPITER * LOWE * TEAM phere is a fluid in constant motion. Follow the dynamic MIDLAND * NEVADA * CTE * WELZ progress of storms and cloud cover, on up to 100 full frames continuously animated images! VISA * REVEX * BOOKS & MAPS *

LICENSED CREDIT BROKER The really important feature is the ability to display in 800 OPEN I0am - 5.45pm TUES - FRI Illanl - 4.45pm S XT pixels 600 lines and 256 colours, all at the same time. Some other systems will display 256 colours but only in far less resolution. Nearly all VGA and SVGA graphic cards are sup- oaa000000-0000 ported. Full Satellite Resolution is received and stored by the system in a massive 512Kb file. This enables the stunning image GAREX ELECTRONICS quality and image processing. METEOSAT WEATHER SYSTEM The complete basic METEOSAT system, no computer, just a plug-in and go package Only £199.00 inc VAT & postage that can be up and running in 10 minutes. Antenna, receiver, frame store, all cables through to 12" mono monitor: £813.25 Upgrade for £99.00 and your PC GOES in exchange. for less monitor: 6612.001 Meteosat Receivers GAREX VHF PREAMPLIFIERS Miniature (only 34x9x15mm), any frequency in the range 40-200MHz, upto25dB gain. Meteosat Yagi £124.95 Stock versions: 6m, 4m, 2m, 137MHz (W -Sat): £12.21 Metosat Preamplifier £92.00 Airband 118-136MHz (reduced gain): £12.21 Other frequencies in the range 40-200MHz to order: £14.56 20m Meteosat cable £16.00 TONE BURST GENERATOR Meteosat receiver £199.00 Miniature (38x18x10mm) xtal controlled 1750Hr. £18.34 PCSAT Ill cable £9.95 GAREX DC/DC INVERTERS PCSAT Ill system £199.00 A popular line for many years. Economy package: chassis section cut from commer- cial R/T gear, re -wired and tidied up to make free-standing unit, no expensive cabinet, Complete Meteosat system as above only £640.00 inc. just basic value for money. 12V DC input, 250V 150mA DC output: £11.19 Polar Systems 12V DC input, 400V 200mA DC output: £12.21 We produce a professional scanning receiver for NOAA, 4METRE RX CONVERTER High quality PMR front end by famous manufacturer, modified to make a 4m METEOR, OKEAN and FENG YUN; and low cost antenna sys- converter: 10-11MHz output. Full data. Requires xtal, approx 15MHz: £17.32 tems. INSTANT TRACK is the ultimate Polar tracking program 4METRE 0.5 WATT FM TX for up to 200 satellites at £24 95 inc. Tx Low Power driver unit matching above Rx, with modulator, fully aligned, with data £16.30 lor+ xtal for 70.45MHz £20.39) Suitable PTT fist microphone: £4.04 Computers PYE ANTENNA RELAYS We can supply PCs to any specification at really good prices. 12V operation, handles 50 watts up to 200MHz: £1.99 Call us if you need details or if you want to purchase a (each) 61.53 5 or more complete "turnkey" solution. WESTMINSTER FM BANDWIDTH CONVERSION KITS Converts 50kHz or 12.5kHz FM Westminsters (UHF or VHF) to Amateur band 25kHz Call or write for a full catalogue. spec. Comprises 2 x 1F filters + squelch board £15.25 Lots more: Timestep world-beating Weather Satellite systems, Monitor Receivers, Pye R/T spares. Write, fax or phone for lists. Regular lines, components and bargains for callers, Open 10am - 5pm Mon - Fri (occasional Sets). Timestep Weather Systems ALL PRICES INCLUDE UK CARRIAGE AND VAT. Wickhambrook Newmarket -VISA CB8 8QA England GAREX ELECTRONICS STATION YARD, SOUTH BRENT, SOUTH DEVON T010 9AL Tel 0440 820040 Fax 0440 820281 Phone: (0364) 72770 Fax: (0364) 72007 G>0000 o ShortWave Magazine, November 1991 7 PC GOES/WEFAX HIGH QUALITY ACCESSORIES 112EZI111=11231171 FOR SCANNING MONITOR RECEIVERS Jlñi PSU-101 1. JIM PSU-101 MkIV. A high quality UK manufactured fully regulated 220-240V AC power supply with RADIO BASE HOLDER combined. For use with FAIRMATE HP-100E/200E/2000/ 1000AB. AOR-1000/2000. YUPITERU MVT-5000/7000/125. ALINCO DJ-Xl. REALISTIC PRO -35/38. ICOM-RI. UNIDEN UBC5OXL. BC55XLT. UBC7OXLT. UBC100XLT.New unique features include2 DCoutput sockets one for radio and the other for accessories. A bracket for BNC socket for antenna connection. PC GOES/WEFAX enables you to receive Separate DC leads included. PRICE £29.95. both FAX and SATELLITE 2.JIM BH-A3. Universal base stand for handheld scanners -transceivers etc. convenient, safe support of images on your PC computer. radio. Adjustable front stop. Heavy duty chromed base. Bracket for BNC In FAX mode it will display weather charts, rebroadcast satellite socket for base antenna connection. PRICE £9.95. images, press and amateur transmissions. In SATELLITE mode 3. JIM CH -A4. Car mounting holder for handheld scanners- transceivers it will capture images from both METEOSAT and all Polar with BELT CLIP support. Safe and convenient use of scanner etc. in car. Orbiting Satellites. truck, boat etc. PRICE £7.00. Some of its many advanced features: 4. JIM BC -4H. Unique FAST Universal 4 hour + 14 hour Ni -cad charger. Image Resolution: 640 x 800 x 16 Standard, 1280 x 800 x 256 "auto -switch -off' timer (no more guessing). Ideal Fairmate, AOR, Yupiteru etc. Leads + 4 sizes of AA holders supplied PRICE £19.50. with VGA and 1MB EMS. Super VGA Support. 5. Watch this space for high quality Universal S meteF for scanners,CB Display in BlackNVhite, Monochrome Grey Scale, Blue/Grey, etc! Colour or User Programmable Colour. Supports all known FAX and Satellite transmission modes. Start, Stop, Phasing Tone Payment by postal order or cheque. Prices include postage recognition and Tuning Oscilloscope. Latitude and Longitude Further information on SSE products, sendA4 SAE to: Gridding on Polar Orbiting Images. Interactive Thermal Infra red Analysis. Polar orbiting Prediction Program, Multiframe Anima- SOLID STATE ELECTRONICS (UK) tion. Image Brightness, Contrast, Reversal and Rotation control. 6 The Orchard, Bassett Green Village, Southampton SO2 3NA PRICE ONLY £ 199.00 Inc. VAT. P&P £3.25 Tel: (0703) 769598 PC HF FAX 5.0

PC HF FAX enables you to receive weather charts, rebroadcast satellite pictures, REALISTIC SCANNERS amateur and press transmissions on your ONLY £249.95 PC Computer. 2006 s s -* (list £329.95) This new version contains many improvements and enhance- 400Ch. AM/FM 25-520, 760 -1300 MHz 240/12v ments over the earlier popular version. ONLY Displays up to 16 intensity levels with 640 x 800 resolution. IOC PRO r-..i. £159.95 Rates 288, 576, 864 and 1152. Line Rates 60, 90, 120, 180 and 2022 ts (list £199.95) 240. Start and Stop Tone recognition with automatic unat- 200Ch. 68-88, 107-174, 380-512, 860-960 MHz tended capture. Storage/Retrieval and Print from Disk. Image Zoom, Reversal, False Colour. We stockALLRealistic scanners. AOR s now in stock. P X welcome Comprehensive File Management. All scanners include FREE p&p in the UK. 12 months warranty GOCVZ Link Electronics G6YTI PRICE ONLY£99.00inc. VAT. P&P £3.25 i Authorised Tandy Dealer) 228 Lincoln Road, Peterborough PE1 2NE (0733-345731) SAE for leaflet. NSA PC SWL ® Phone for latest on secondhand bargains. The PC SWL is a complete package allowing reception of MORSE CODE, RTTY and FEC. *RTTY Baudot 45,50,57,75 and 100 Baud. *RTTY ASCII 75,110,150 and 300 Baud COMMODORE 64 *CIR 476 Codes FEC, SELCAL and NAVTEX. *MORSE CODE 1 to 40 WPM. *Automatic Calibration and Code Recognition. PACKET *Unattended Capture and Printing. PACKET ON THE COMMODORE, WITHOUT A TNC! Yes, it's true, you can run packet on a Commodore 64 without the need PRICE ONLY£99.00inc. VAT. P&P £3.25 for a costly TNC. We offer a dedicated packet modem, together with a Order PC HF FAX and PC SWL together for free copy of an excellent public domain programon disc. ONLY £178.00 INC VAT, P & P £3.25 This really is the inexpensive way to get on the air with Packet Radio. CALL TODAY FOR FULL DETAILS AND BROCHURES. MODEM with FREE SOFTWARE ONLY £50.00 COMAR ELECTRONICS Send large SAE )33p stamp) for details of all our products. Unit 10, Samuel Whites Estate, LIEF' EEECTROf `OS LTD. Medina Road, Cowes, Isle of Wight Unit45, MeadowmillEstate, Dixon Street, ' P031 7LFTel: 0983 200308 VISA Kidderminster DY101HHTel: (0562)753893 777

72 Short Wave Magazine, November 1991 AERIAL TECHNIQUES Guaranteed complete to the last nut! COMPACT 80m CW QRP Tx/Rx SPECIAL PRODUCTS FOR TV-DXING 0103 Kit - 187.50 P&P 13.00 Ready Built - f140.00 New 10" Screen Multi -System NEW Compact Combined B1/3 + Stable VFO * &doom * Audio Filter B & W TV Array for TV-DXing. * Requires 12/14 VOC * Very detailed and Monitor Total Length only 4ri 10in Instructions * Black Mee case * Printed panel 40m & TOP BAND VERSIONS ALSO AVAILABLE

ANTENNA TUNING UNITS Full VHF UHF coverage s.>.e- _ u TU1 Kit - 141.25 Ready Built - 157.50 for Europe. UK & France. 4 -way power TU2 Kit - f51.00 Ready Built - f72.00 source. Mains, 12v DC. Dry batteries. also Complete with folded dipoles for both Banc P&P f3.00 chargeable power source with rechargeable 1 and Band3 for optimum performance. * Large dia. coil * High grade capacitor * Built in balun * Circuits to match Covers Band 1 (47-70MHz) at 3.5dB gar your antenna * Up to 30 Watts of CW * TU2 has sensitive ORP/SWR meter Lalenes. Full Video & Audio inputs via phono sockets. Unique charger circuit within Band 31175-230MHz) al 8dB gain * TU1 is ideal for SWL £44.50 inclusive of Vat. Ails Ally the TV for re -chargeable batteries. £149.50 inclusive of Vat. Carriage and insurance £6.50. QRP SWR METER Carriage & Insurance £6.50 VHF to UHF Upconverter, Model 3638 * Specially designed for ORP * HF 1-30MHz

* Can be set down to ', watt for FSD * Ideal for milliwatting * Low insertion loss 0.2dB TUA1 Kit - complete with case & meter 118.00 P&P £1.00

CARLTON (Receiver) Vertical load carrying 45kg takes 2' main Converts input band of 40-230MHz to 80-40-20m Dc Rx mast. 1.12' stub mast. £44.95 inclusive of equivalent bandwidth at UHF. ideal for TV - * Receives USB. LSB and CW * Very sensitive Vat. Additional Alignment bearing £18.60 DXing with a domestic TV £49.95 inclusive of and selective * Simple modular construction inclusive of Vat. P&P on Rotor £4.50. Vat. post & packing * 12-14 volt battery operated * Printed facia Aerial Techniques. the company that knows the TV-DXing hobby. We stock a large Kit complete with case - 169.50 P&P 13.00 range of equipment for all types of aerial installation. all detailed in our 29 page Catalogue at 75p. why not send for your copy today. We also have available Multi - PSU 15 REGULATED standard TV's and Video recorders for all systems. PAL, SECAM & NTSC. Most makes of Satellite equipment carried together with decoders for Canal Plus, RAI POWER SUPPLY UNO, RAI DUE, PAUD2-MAC Satellite receivers now in stock. also SECAM to Pal * Ready built * Mains input * 13.8V @ 1.5A Transcoders (SAE details) output * Ideal for DTR3 & 'Carlton' * Fully SPECIAL PRICE!!! UNIDEN UST -92 D2 -MAC to PAL Decoder £399.00+ VAT protected ACCESS. VISA & AMERICAN EXPRESS Supplied ready built - f52.00 P&P f4.00 Mail & Telephone orders welcome VISA Send SAE for brochure or call Alan G4DVW on 0602 382509 124hr service) i LAKE ELECTRONICS 11. KENT ROAD. PARKSTONE. POOLE. DORSET BH12 2EH 7 Middleton Close, Nuthall, Nottingham NG16 1BX Tel: 0202 738232Fax: 0202 716951 (callers by appointment only)

FLIGHTDECK THE AIRBAND SHOP RADIO AMATEURS EXAM? 192 Wilmslow Rd., Heald Green, Cheadle, Cheshire SK8 3BH Telephone: 061-499 9350 Fax: 061-499 9349 PASS FIRST TINE! ALL THE ENTHUSIAST NEEDS Before you enrol check the benefits of Main Stockists of receivers by: RRC'S unique Home 7bition Service SONY, ICOM, LOWE, KENWOOD, AOR, YUPITERU, UNIDEN, SIGNAL, WIN, FAIRMATE. Comprehensive range of accessories, RRC has helped thousands of students to success in their aerials, books, aero-charts etc. examinations with this unique system of postal tuition, one which PX welcome, finance available (subject to status). guides you, step-by-step, to qualify in the shortest possible time. Open: Monday to Saturday 9.30 a.m. - 5.30 p.m. Only The Rapid Results College offers you all these advantages: We are located on the A34 (Wilmslow Road), 2 miles South from the M63 Junction 10, just 3 miles from Manchester International Airport [j A qualified personal tutor Ü Free advice before you enrol

Send 50p for illustrated Catologue from Dept.SWM4 Study material prepared by ETelephone Helpline specialists E Free 'How to Study' Guide El Completely self-contained courses Instalment Plan El Handy pocket-sizod booklets Free Postage on course Professional WEATHER MONITORING at low cost Personal study programme material FEATURES (depending on model) E Worldwide Airmail Service WIND DIRECTION OUTSIDE TEMPERATURE El Regular marked tests WIND SPEED MIN MAX TEMPERATURE E Courses regularly updated Extra tuition free if you GUST ALARM RELATIVE HUMIDITY 48 hour despatch don't pats first time GUST SPEED BAROMETRIC PRESSURE RAINFALL WOODEN CABINET SUNSHINE MAINS & 12.24V DC * All main readings at a glance * * POST COUPON TODAY FOR FREE RADIO AMATEURSPROSPECT SEND FOR Please send me my prospectus as quickly as possible. COLOUR BROCHURE Mr/MrsíMiss/Ms Prices from only Address

£199 POSILLXte inc. VAT NSA 7111f fr The Rapid Results College c R&D ELECTRONICS, UNIT 19, THE ST JOHN WORKSHOPS, 1 Dept IN I It. Tu,l,on House. 1.ondon Sw 19 aDS 1 RI 4D, ICE 08194'-.-_ 19am-Spml MARGATE, KENT CT9 1TE.TEL: (08431 221622 RRCPROSPECTlS O81 9ac 110: 124 no,,r Rr.ordaca'.I 1er.,.c quoting Den,IsoaMr.e1

Short Wave Magazine, November 1991 73 =e3 BOOK SERVICE (0202) 665524 S The books listed have been selected as being of special interest to our readers. They are supplied from our editorial address direct to your door. Some titles are overseas in origin. HOW TO ORDER POST AND PACKING; add £1.00 for one book, £2.00 for two or more books, orders over 640 post and packing free, (overseas readers add £1.75for one book, £3.50 for two or more for surface mail postage) and send a postal order, cheque or international money with your order (quoting book titles and quantities)to PW Publishing Limited, FREEPOST, Enefco House, The Quay, Poole, Dorset BH15 1PP. Please make your cheques payable to Short Wave Magazine, payment by Access, Mastercard, Eurocard or Visa also accepted on telephone orders to Poole (0202) 665524. Books are normally despatched by return of post but please allow 28 days fordelivery. Prices correct at time of going to press. Please note: all payments must be made in Sterling.

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chokes ndISectionso.coversthhtopics dtmainsrsand audio outputwilluhowfo mere. cvekesandrctin Whatistchregwreaturns audibook tput transformers,uhow LISTENING GUIDE to find out. Text and tables.160 pages. 6250 NEW BOOKS FERRELL'S CONFIDENTIAL FREQUENCY UST SIMPLE ELECTRONIC CIRCUIT AND COMPONENTS (BM)Compiledby Geoff Halligey The band 4-28MHz covered in great depth. Who's AMATEUR RADIO FA.WILSON using what frequency and mode, what's that consign? These are some of the Components, circuits, formulae and radio matters are dealt with in this book. A answers this book will help you find. A very comprehensive book. 390 pages AN INTRODUCTION TO RADIO WAVE PROPAGATION (BP293) book to fill in the gaps that appear when taking the RAE or the Novice course. Also 117.95 J.G. LEE eminently suitable for anyone wishing to study at home. 209 pages. 13.50 does the sun and sunspots affect the propagation of the radio waves which SOUNDS EASY (1991 EDITION)How are the basis of our hobby? They affect the ionosphere, but differing frequencies SHORT WAVE SUPERHET RECEIVER CONSTRUCTION (BP276) Compiled by Ken Davies A complete guide to the numerous local radio stations are treated differently. Find out how to use charts to predict frequencies that will R.A. Penfold A general purpose receiver to build, from antenna to audio, throughout the UK. If you do a lot of travelling this book is invaluable. Itemised by be the most profitable. Wat effect will noise have on the signal? Find out with this described in understandable English. 74 pages. 1295 areas, it makes finding you kind of sounds easy.52 pages. 62.95 book. 116 pages. £3.95 AIR TRAFFIC RADIO AN INTRODUCTION TO VHF/UHF FOR RADIO AMATEURS (BP281) 1991 Edition Ken Davies Frequencies and abbreviations used in air traffic I.D. Poole An excellent book to go with the new Novice or full callsign. Nine ANTENNAS control throughout the UK. Whereto listen for tower, ground and radar control in chapters and an appendix deal with all aspects and frequencies from 50 to civilian and other airports. It also includes a small section on off -shore oil related ALL ABOUT CUBICAL QUAD ANTENNAS 64 pages. 13.95 1300MHz. 96 pages.DWilliam I. Orr W6SAI and 113.50use.Stuart D. Cowan W2LX W1FB's DESIGN NOTEBOOK The quad antenna came into being, and popularity, over 50 years ago. This book INTERNATIONAL RADIO STATIONS GUIDE (BP255) Doug DeMAWW1FB This book is aimed atthe non -technical amateurwhowants shows you how to design build and'feed'this versatile antenna. IF you just want New revision by Peter Shore to build simple projects and obtain a basic understanding of amateur electronics. to build one then, there are ready to go designs for bands between 7 and 50MHz. As in, 'Broadcast Roundup', his column in P W, Peter Shore has laid this book out 195 pages 0.50 122 pages. 16.75 in world areas. There are sections covering English language transmissions. programQRPfor DXersand . sections on European medium wave THE ANTENNA EXPERIMENTER'SGUIDE CLASSICS and UK fsm. sttations. 266pages.loE595 Edited by Bob Schetgen KU7G Operating GRP is fun. This book increases the Peter Dodd G3L00 enjoyment by showing you how to build items that you can be proud of. The can Although written for Radio Amateurs this boon will be of interest to anyone who hoold their own against the 'Kenyaecom'rig, and come muchcheapertoo. Extracts enjoys experimenting with antennas. You only need a very basic knowledge of from OST and the ARRL handbook, superbly packed in. 274 pages .19,95 radio & electronics to get the most from this book. 207 pages. £9.99 THEORY THE SATELLITE EXPERIMENTER'S HANDBOOK 2nd Edition FUTHER PRACTICAL ELECTRONICS CALCULATIONS AND FORMULAE Martin Davidoff K2UBC The book is divided into four main sections - History, FAULT FINDING (BP1441 F.A. Wilson Getting Started, Techincal Topics and Appendices. It provides information on Contains sections about electrical basics. electrostatics, electromagnetism, gherd generation, amplifiers, spacecraft built by, and for, radio amateurs. In addition, it discusses weather, TV- enoa waves,s MORE ADVANCED TEST EQUIPMENT CONSTRUCTION (BP249) relimathematics,materls, n the signalradio front radiothere n broadcast and other satellites of interest to amateurs.313 pages 014.50 are sectionsaboutei,. spectrum R.A. Penfold matters,receivers,antennasandtransmissionlinelcucalculations. Finally general A follow on from Test Equipment Construction (BP248) this book looks at digital W1 FBI HELP FOR NEW HAMS formulae and conversion factors are given with a short history of electronics methods of measuring resistance, voltage, current, capacitance and frequency. squeezed in at the end. 450 pages. 14.95 W1 FRS Maw W1FB This book everything from getting acquandacquainted intedwith with Also covered is testing semi-conductors,along with test gear for general radio D.Mewuipment W1FBtoThis bookg ingfromtettng Dougnew coversestetryo ac related topics.107 pages. 13.50 problems to on -the -air conduct and procedures. 155 pages. 16.95 REFLECTIONS Transmission Lines &Antennas Maxwell W2DU This will help dispel the half-truths and outright HOW TO USE OSCILLOSCOPES AND OTHER TEST EQUIPMENT 113P267)M-WeNermyths that atchpeoplee believetewerare andantennatransmissionsio2lines,es.04.5 waves, RA.PenfoldHints and ideas on how to use the test equipment youhave.to , antennamatching,reflected ewer and antenna tuners. 373 pages. 114.50 CONSTRUCTION check out. or fault find on electronic circuits. Many diagrams of typical waveforms COIL DESIGN AND CONTRUCTION MANUAL (BP160) and circuits, including descriptions of what waveform to expect with particular B.B. BabaniCovering audio to r.f frequencies, this book has designs for almost faults. or distortion in audio amplifiers. 104 pages. 13.50

standard, colour, satellites, antennas, photography. station identification. AUDIO (Elements of electronics - book 6) RADIO interference etc. Revised and updated 1986. 87 pages. 15.95 F. A Wilson This book studies sound and hearing, and examines the operation of microphones, GUIDE TO WORLD-WIDE TEUEWSION TEST CARDS AIR & METED CODE MANUAL loudspeakers, amplifiers, oscillators, and both disk and magnetic recording. Edition 3. Keith Hamer & Gerry Smith 10th Edition, Joerg Klingenfuss Intended to give the reader a good understanding of the subject without getting Detailed descriptions of the World Meteorological Organisation Global Completely revised and expanded, this is a very handy and useful reference book involved in the more complicated theory and mathmatics. 320 pages. 13.95 System operating FAX and RTTY metes stations, andits for the DXTV enthusiast. Over 200 photographs of Test Cards, logos, etc., world message format with decoding examples. Also detailed description of the wide. 60pages. 14.95 EVERYDAY ELECTRONICS DATA BOOK Aeronautical Fixed Telecommunication Network amongstothers. 289 pages 05.00 Mike Tooley BA THE ATV COMPENDIUM Tins book is an invaluable source of information of everyday relevance in the world HIGH POWER WIRELESS EQUIPMENT Mike Wooding G610M of electronics. It contains not only sections which deal with the essential theory of Articles from Practical Electricity 1910-11 This book is for those interested in amateur television, particularly the home electronic circuits, butitalso deal with a wide range of practical electronic Edited by Henry Walter Young construction aspect. There is not a 70cm section as the author felt this is covered applications. 250 pages. E8.95 A reprint of interesting practical articles from the very early days of radio. in other books. Other fields, such as 3cm TV, are covered in depth. A must for the 99 pages. 16.65 practical ATV enthusiast. 104 pages. C3.00 FILTER HANDBOOK A practical design guide Stefan Niewiadomski RADIOTELETYPE CODE MANUAL A practical book, describing the design process as applied to filters of all types. 10th Edition. Joerg Klingenf ass SATELLITES Includes practical examples and BASIC programs. 195 pages. 125.00 This book givesdetailed descriptions of the characteristics of telegraph AN INTRODUCTION TO SATELLITE TELEVISION IBP1951 FROM ATOMS TO AMPERES transmission on short waves, with all commercial modulation types including F. A. Wilson FA.Wilson voice frequency and comprehensive information on all RTTY systems Answers all kinds of questions about satellite television For the beginner thinking Explainsin simple terms the absolute fundamentals behind electricity and and c.w. alphabets. 96 pages. 18.00 about hiring or purchasing a satellite N system there are detailsto help you along. electronics. 244pages. £3.50 For the engineer there are technical details including calculations, formulae and RESCUE tables. 104 pages. £5.95 Paul B & Paul Berries PRACTICAL ELECTRONICS CALCULATIONS AND FORMULAE (BP53) F. A. Wilson This book follows the life and conditions of rescue helicopter crews. This is not SATELLITE TELEVISION A layman's guide This has been written as a workshop manual for the electronics enthusiast. There drama, this is real life and it makes a true impression of the rescuervices for the Peter Pearson is a strong practical bias and higher mathematics have been avoided where reader. There are transcriptions of air/ground and between crew dialogues. a Pictures from space, that's what satellite television is all about. Orbiting satellites possible. 249 pages. £3.95 summaray of the main distress and resuce radio frequencies and helicopter base 35 000km high receiver N signals from stations on the earth and retransmit them locations. 192pages. 19.99 back again. This book explains all you need to know to set up your own satellite SOLID STATE DESIGN FOR THE RADIO AMATEUR TV terminal at home, dish and accessories, cable and tuner. 73pages. 11.00 Les Hayward W7Z01 and Doug DeMaw W1FB SCANNERS (Third Edition) Back in print by popular demand! A revised and corrected edition of this useful Peter Rouse GUI DKD SATELLITE TELEVISION INSTALLATION GUIDE reference book covering all aspects of solid-state design. 256 pages110.95 A guide for users of scanning receivers, covering hardware. antennas, accessories. 2nd Edition. John Breeds frequency allocations and operating prodedures. 245 pages. 18.95 A practical guide tosatellite television. Detailed guidlines on installing and THE ARRL ELECTRONICS DATA BOOK aligning dishes based on practical experience. 56pages. 111.95 Doug DeMaw W1FB SCANNERS 2 Back by popular demand, completely revised and expanded, this is a handy Peter Rouse GUI DKD THE SATELLITE BOOK (A complete guide to satellite TV theory and reference book for the r.f. designer, technician, amateur and experimenter. The companion to Scanners, this provides even more information on the use of the practice) 260 pages 18.95 v.h 1.and u.h.f. communications band and gives constructional details for John Breeds accessories to improve the performance of scanning equipment. This book deals almost exclusively with television broadcast satellites and is a TRANSFORMERS 216 pages. £9.95 comprehensive collection of chapters on topics, each written by a expert in that Jerry Sevick W2FMI field.It appears to be aimed at the professional satellite system installer, for This is the second edition of this book, which covers a most inriguing and SHORT WAVE RADIO LISTENERS' HANDBOOK whom it is invaluable, but it will be appreciated by a much wider audience- anyone confusing area of the hobby. It should enable anyone with a modicum of skill to Arthur Miller interested in satellite technology. 280pages 127.00 make a balun, etc 270 pages. 113.50 In easy -to -read and non -technical language, the author guides the reader through the mysteries of amateur, broadcast and CB transmissions. 207 pages. 17.99 WEATHER SATELLITE HANDBOOK 4th edition Dr Ralph E. Taggart WBBDQT BEGINNERS WORLDWIDE HE RADIO HANDBOOK This book explains all about weather satellites. now they work and how you can AN INTRODUCTION TO RADIO DOING (BP91) Marlyn R. Cooke receive and decode their signals to provide the fascinating pictures of the world's R. A. Penfold This book lists high frequencies used by aircraft and aeronautical ground stations. weather. There are plenty of circuit diagrams and satellite predicting programs. How to find a particular station, country or type of broadcast and to receive it as Divided into sections, Military, Civil etc. The book should be easy to use. 16.95 191pages. 114.50 clearly as possible. 112pagesE1.95 1934 OFFICIAL SHORT WAVE RADIO MANUAL THEORY Edited by Hugo Gernsbeck BEGINNER'S GUIDE TO RADIO A fascinating reprint from a bygone age with a directory of all the 1934 s.w. A BEGINNERS GUIDE TO MODERN ELECTRONIC COMPONENTS 9th Edition. Gordon J. King receivers, servicing information, constructional projects, circuits and ideas on Radio signals, transmitters, receivers, antennas, components, valves and building vintage radio sets with modern parts. 260 pages. 170.15 (BP285) RA. Penfold . CB and amateur radio are all dealt with here. 266 pages. 18.95 This book covers a wide range of modern components. The basic functions of the TELEVISION components are described, but this is not a book on electronic theory and does not ELECTRONICS SIMPLIFIED - CRYSTAL SET CONSTRUCTION (BP921. assume the reader has an in-depth knowledge of electronics. It is concerned with F. A. WilsonEspecially written for those who wish to take part in basic radio A TV-OXERS HANDBOOK ( BP176) R. Bonney practical aspects such as colourcodes, deciphering code numbersand the suitability building. All the sets in the book are old designs updated with modern bcomponents. Information on transmission standards, propagation, receivers including multi - 164 pages. 13.95 72 pages £1.75 74 Short Wave Magazine, November 1991 THE SIMPLE ELECTRONICS CIRCUIT AND COMPONENTS Book One (BP621 AN INTRODUCTION TO AMATEUR RADIO (BP257) This is a concise collection of practical and relevant data for anyone working on --::x 5 t provide an n -expensive sat comprehensive introduction L D Poole sound systemsThe topics covered include microphones, gramaphones, CDs to ,iica ,es the newcomer a comprehensive and easy to understand guide name a few190 pages Hardback £10.95 E3 513 a-,r radio Topics include operating procedures, jargon, propagation a station 150 pages £3.50 N EWNES COMPUTER ENGINEER'S POCKET BOOK This is aninvaluable compendium of facts, figures, circuits and data and is LISTENING GUIDES HINTS AND KINKS FOR THE RADIO AMATEUR indispensable to the designer, student, service engineer and all those interested Edited by Charles L. Hutchinson and David Newkirk in computer and microprocessor systems 203 pages. Hardback £10.95 =_J from the parr- 2cTmagazine AIR BAND RADIO HANDBOOK 13rd Edition) A collection of erect ic. NEWNES ELECTRONICS POCKET BOOK David J. Smith 152 pages. £4.95 5th Edition Listen to conversations between aircraft and ground control The author, an air Presenting all aspects of electronics in a readable and largely non -mathematical traffic controller, explains more about this listening hobby.174 pages.£7.50 HOW TO PASS THE RADIO AMATEURS' EXAMINATION IRSGB) farm for both the enthusiast and the professionalengineer. Clive Smith G4FZH and George Benbow G3HB 315 pages Hardback £10.95 DIAL SEARCH The boa dultiple choice exa- - with sum) 1991 Edition. George Wilcox RAE c::.-- ' -ce plus maths re.s airdo page: E6.70 NEWNES RADIO AMATEUR AND LISTENER'S POCKET BOOK The listener's check list and guide to European broadcasting. Covers m.w., Lw Steve Morley G3FDI vh f. and sw., including two special maps. 59 pages. E3.95 PASSPORT TO AMATEUR RADIO This book is a collection of useful and intriguing data for the traditionaland modern Reprinted from PW 1901-1982 amateur swell as the s I. Topics such as AMTOR, packet radio, SSTV, computer

FLIGHT ROUTINGS 1991 The fa _ . GW3JGA, used by thousands of successful RAE candidates communications and maritime communications are all covered. 160 pages. £9.95 T.T.Williams in their , - .= other useful articles for RAE students Identifies the flights of airlines, schedule, charter, cargo and mail, to and from the 96 pages 61.50 NEWNES RADIO AND ELECTRONICS ENGINEERS POCKET BOOK UK and Eire and overflights between Europe and America. 104 pages. £5.25 18th Edition. Keith Brindley PRACTICAL GUIDE TO PACKET OPERATION IN THE UK Useful data covering math, abbreviations, codes, symbols, frequency bands,! GUIDE TO BROADCASTING STATIONS Mike Mansfield G6AWD allocations, UK broadcasting stations, semi -conductors. components, etc. 20th Edition 1909/90. Philip Danington Introduces the concept of packet radio to the beginner. Problem areas are discussed 325 pages. Hardback £9.95 Frequency and station data, receivers, antennas, Latin American DXing, reporting, and suggestions made for solutions to minimise the problems Deals with the computers in radio, etc. technical aspects of packet taking the reader through setting up and provides a POWER SELECTOR GUIDE (BP235) 240 pages. £10.95 comprehensive guide to essential reference material 9lpages. £6.95 J. C. J. Van de Ven This guide has the information on all kinds of power devices in useful categories GUIDE TO FACSIMILE STATIONS 11th Edition PRACTICAL IDEAS FOR RADIO AMATEURS Other than the usual alpha numeric sort) such as voltage and power properties Joerg Klingenfuu Ian Poole G3YWX making selection of replacements easier.160 pages £4.95 This manual is the basic reference book for everyone interested in FAX. Frequency, Offers a wealth of hints, tips and general practical advice for all transmitting callsign, name of the station, ITU country/geographical symbol, technical amateurs and short wave listeners128 pages £5.95 parameters of the emission are all listed. All frequencies have been measured to CONSTRUCTION the nearest 1 WHz. 408 pages £16.110 RADIO AMATEUR CALLBOOK NORTH AMERICAN LISTINGS 1991 HOW TO DESIGN AND MAKE YOUR OWN PCBs IBP1211 GUIDE TO FORMER UTIUTY TRANSMISSIONS 69th Edition R. A. Penlold 3rd Edition. Joerg Klingenfuu Listings of US amateurs pnclumng irawanj Also costales standard fume chart, Designing or copying panted circuit board designs from magazines, including Built on continuous monitoring of the radio spectrum from the sixties until the census of amateur licences of the world, world-wide OSL bureau and much photographic methods. 80 pages. £2.50 recent past. A useful summary of the former activities of utility stations providing more. Over 1400 pages> £19.50 information for the classification and identification of radio signals. 126 pages. INTRODUCING GRP £3.00 RADIO AMATEUR'S GUIDE TO RADIO WAVE PROPAGATION Collected articles from PW 1983.1985 (HF Bands). F. C. Judd G2BCX An introduction to low -power transmission )ORP). This book includes full GUIDE TO UTILITY STATIONS The how and why of the mechanism and variations of propagation in theh f bands constructional details of a variety of designs by Rev. George Dobbs G3RJV for 9th Edition. Joerg Klingenfuss 144 pages £10.95 transmitters and transceivers covering Top Band to 14MHz, together with test This book covers the complete short wave range from 3 to 30MHz together with equipment by Tony Smith G4FAI64pagesE1.50 the adjacent frequency bands from 0 to 150kHz and from 1.6 to 3MHz. It includes THE 1991 ARRL HANDBOOK FOR THE RADIO AMATEUR details on all types of utility stations including FAX and RTTY. There are 15802 This is the 66th edition of this very useful hardback reference book. Updated MORE ADVANCED POWER SUPPLY PROJECTS IBP192) entries in the frequency list and 3123 in the alphabetical callsign list plus press throughout a has several new sections covering oscilloscopes. spectrum analysers. R. A. Fanfold services and meteorological stations. 502 pages. £19.00 digital frequency synthesis, phase -noise measurement and new constructional The practical and theoretical aspects of the circuits are covered in some detail. protects. 1200 pages 0/P Topics include switched mode power supplies, precision regulators, dual tracking HF OCEANIC AIRBAND COMMUNICATIONS regulators and computer controlled power supplies, etc. 92 pages. £2.95 3rd Edition. Bill Laver THE ARRL OPERATING MANUAL HF aircraft channels by frequency and band, main ground radio stations, European Another very useful book from the ARRL. Although writes for the American radio POWER SUPPLY PROJECTS )BP76) R/T networks and North Atlantic control frequencies. 31 pages. £3.95 amateur, this book will also be of use and interest to the UK amateur. R. A. Penlold This book gives a number of power supply designs including simple unstabilised MARINE UK RADIO FREQUENCY GUIDE 684 pages E12.95 types, fixed voltage regulated types and variable voltage stabilised designs. B ill Laver 91 pages £2.50 A complete guide to the UK s.w and vhf. marine radio networks. Useful THE ARRL SATELLITE ANTHOLOGY information, frequency listings and the World Marine Coastal Phone Stations. The best from the Amateur Satellite News column and articles out of 31 issues of OST have been gathered together in this book. The latest information on OSCARs PRACTICAL POWER SUPPLIES 62 pages 64.95 9 through 13 as well asd the RS satellites is included. Operation on Phase 3 Collected articles from PW 1978-19/5 NEWNES SHORT WAVE LISTENING HAND BOOK satellites (OSCAR 10 and 13) is covered in detail. 97 pages. £5.95 Characteristics of batteries, transformers, rectifiers, fuses and heatsinks, plus Joe Pritchard G1UOW designs fora variety ofmainsdriven power supplies, including the P W Marchwood" A technical guide for all short wave listeners. Covers construction and use of sets THE ARRL UHF/MICROWAVE EXPERIMENTERS MANUAL giving a fully stabilised and protected 12V 30A d. c.48 pages. £115 for the s w I. who wants to explore the bands up to 30MHz 288pages £12.95 V ' Authors A truly excellent manual for the keen microwave enthusiast and for the budding (MP NOTEBOOK RADIO LISTENER'S GUIDE 1991 microwaver'. With contributions from over 20 specialist authors. Chapters covering Doug DRMaw W1FB Clive Woodyear techniques, theory, prolects, methods and mathematics. 446 pages £14.50 This book deals with the building and operating of a successful ORP station. Lots This is the third edition of the essential guide ofr all radio listeners. Simple -to -use of advice is given by the author who has spent years as an ardent ORPer. All the maps and charts show the frequencies for all the radio stations in the UK. When THE COMPLETE DX'ER text is easy -to -read and the drawings large and clear. 77 pages. £4.95 travelling or at hone, the guie gives you all the frequencies you'll ever need. 55 Bob Locher W9KNI pages. £2.95 Now back in print, this book covers equipment and operating techniques lathe DX TEST EQUIPMENT CONSTRUCTION (BP248) chaser. from beginner to advanced 187 pages £7.95 RAPenfold THE COMPLETE VHF/UHF FREQUENCY GUIDE Describes, in detail, how toconstruct some simple and inexpensive, but extremely 1991 Edition. THE RADIO AMATEUR'S DX GUIDE (USA) useful, pieces of test equipment.104 pages £2.95 This book gives details of frequencies from 26-2250MHz with no gaps and who 15th Edition uses what. Recently updated, there are chapters on equipment requirements as Tee gwon contains .nformation not easily obtained elsewhere and is intended as 50 (FET) FIELD EFFECT TRANSISTOR PROJECTS (BP39) well as antennas, etc. 88 pages. £5.95 an aid and quick reference for all radio amateurs interested in DX. F.GJ4eyer 38 pages £2.95 50 circuits for the s. w I, radio amateur, experimenter or audio enthusiast using THE INTERNATIONAL VHF FM GUIDE fets. 104 pages. £2.95 7th Edition. Julien Baldwin G3UHK and Kris Partridge GSAUU THE RADIO AMATEUR'S QUESTIONS & ANSWER REFERENCE MANUAL TThe latest edition of this useful book gives concise details of repeaters and 4th Edition. R. E. G. Petri GBCCJ ANTENNAS (AERIALS) beacons worldwide plus coverage maps and further information on UK repeaters This book has been compiled especially for students of the City and Guilds of 79 pages. £2.85 London Institute RAE.It is structured with carefully selected multiple choice ALL ABOUT VERTICAL ANTENNAS (USA) questions, to progress with any recognised course of instruction, although is is not W.I.On W6SAI IL S. D. Cowan W2LX THE POCKET GUIDE TO RTTY AND FAX STATIONS intended as a text book. 280 pages. £1.95 Theory, design, construction, operation, the secrets of making vertical work. B ill Laver 191 pages £8.50 A handy reference book listing RTTY and FAX stations, together with modes and other essential information. The listing is in ascending frequency iorder. from 1 6 THE RAE MANUAL (RSGB) AN INTRODUCTION TO ANTENNA THEORY (SPIN) to 27.1 M H z. 60 pages. £3.95 G.LBenbow G3HB The latest edition of the standard aid to studying for the RadioAmateurs' N. C. Wright This book deals with the basic concepts relevant to receiving and transmitting SHORT WAVE LISTENERS CONFIDENTIAL FREQUENCY UST Examination Updated to cover the latest revisions to the syllabus. 132 pages £6.70 antennas. Lots of diagrams reduce the amount of mathematics involved. Bill Laver 86 pages £2.95 Covering the services and transmission modes that can be heard on the bands between 1.635 and 29 7MHz £0.95 YOUR GATEWAY TO PACKET RADIO Stan Hompa WAILOU ANTENNA IMPEDANCE MATCHING What is packet radio good for and what uses does it have for the 'average' amateur? Wilfred N. Caron WORLD RADIO TV HANDBOOK 1991 Proper impedance matching of an antenna to a transmission line is of concern to broadcast and TV stations. What are protocols? whre, why, when? Lots of the most asked questions are Country -by -country listings of I.w.,m.w.& s antenna engineers and to every radio amateur. a properly matched antenna as the Receivertest reports English language broadcasts. Thes.w.l.'s'bible 576 pages. answered in this useful book. Itincluded details of networking and space comunications using packet. 278 pages. £8.95 termination for a line minimises feed -line losses. Power can be fed to such a line £17.95 without the need for a matching network at the line input There is no mystique involved in designing even the most complex multi -element metworksforbrdadband coverage. Logical step-by-step procedure is followed in this book to help the radio INTERFERENCE MAPS amateur with this task 192 pages. £11.95 IARU LOCATOR MAP OF EUROPE INTERFERENCE HANDBOOK (USA) B EAM ANTENNA HANDBOOK (USA) DARC W. I .On W6SAI & S. D. Cowen W2LX William R. Nelson WA6FOG This multi -coloured, plastics laminated, map of Europe shows the AIRU How to locate and cure r f i for radio amateurs. CBers and TV and stereo owners Design, construe!, = reent and installation of h f beam antennas (-Maidenhead-) Locator System. Indispensible for the v h f and u h f. Doer. 253 pages. £9.50 198 pages £1.50 692 x 872em £5.25 RADIO FREQUENCY INTERFERENCE (USA) NOVICE ANTENNA NOTEBOOK What causes r f. i? Are all rfproblems difficult, expensive and time-consuming NORTH ATLANTIC ROUTE CHART This is a five -colour chart designed for the use of ATC in monitoring transatlantic Doug DeMew W1FB to cure? These questions and many more are answered in this book. flights. Supplied folded.740x52Pkrm. £4.50 Another book from the pen of W1 FB, this time offering "new ideas for 84 pages £4.30 beginning hams". All the drawings are large and clear and each chapter ends RADIO AMATEURS MAP OF NORTH AMERICA (USA) with a glossary of terms. 130 pages£6.95 Shows radio amateurprefix boundaries, continental boundaries and zone boundaries 767x636mmr f3.50 OUT OF THIN AIR AMATEUR RADIO Collected Antenna Articles from PW 1977-19M RADIO AMATEURS PREFIX MAP OF THE WORLD (USA) Including such favourites as the ZL Special and '2BCX 16 -element beams for 2m, ALL ABOUT VHF AMATEUR RADIO (USA) Showing prefixes and countries, plus listings by order of country and of prefix. and the famous"SlimJim", designed by Fred Judd G2BCX Also features systems for Top Band, medium wave/long wave loop designs and a vh f. direction finding W. I. On W6SAI 1014 x 711rrrn13.50 VHF/UHF propagation, including moonbounce and satellites, equipment and loop Plus items on oropagahon accessories and antenna design antennas.172 pages. £9.50. RADIO AMATEURS WORLD ATLAS (USA) 80 pages El BO Seventeen pages of maps, including the world -polar projection. Also includes the AMATEUR RADIO CALL BOOK (RSGB) table of allocation of international callsign sexes £4.50 SIMPLE. LOW-COST WIRE ANTENNAS FOR RADIO AMATEURS (USA) 1991 Edition W. I. Orr W6SAI & S. D. Cowan W2LX Now incorporates a 122 -page section of useful information for amateur radio Efficient antennas for Top Band to 2m, including "invisible" antennas for difficult enthusiasts. 429 pages. £7.20 DATA REFERENCE station locations.191 pages. £7.50

AMATEUR RADIO SATEWTES the first 25 years DIGITAL IC EQUIVALENTS AND PIN CONNECTIONS IBP140) THE ARRL ANTENNA BOOK (USA) 16th Edition Arthur C. Gee G2UK A. Michaels A station is only as effective as its antenna system. This book covers propagation, This souvenir publication is mainlya pictorial account of the pattern of developments Equivalents and pin connections of a pc,. air selection of European, American and practical constructional details of almost every type of antenna, test equipment which have occurred over the last 25 years in amateur radio satellite operations Japanese digital i c s256 pages E5.95 and formulas and programs for beam heading calculations£14.50 34 pages E2.25 INTERNATIONAL TRANSISTOR EQUIVALENTS GUIDE 1BP85) A. Michaels AN INTRODUCTION TO AMATEUR COMMUNICATIONS SATELLITES BP290 Possible substitutes for a popular selection of Euroo r -en can and Japanese A. Pickard transistors. 320 pages. £3.95 This book describes several currently available systems. their connection to an I appropriate computer and how they can be operated with suitable software. 102 NEWNES AUDIO & HI -F1 ENGINEER'S POCKET BOOK pages. £3.95 Vivian Capel Turn to page 76 for more books. Short Wave Magazine, November 1991 75 BOOK SERVICE continued from P. 75 VISA 1+ (0202) 665524 S147 Al through beam and triangle designs to a mini -rhombicDimensions for specific extend the capabmtes of a multimeter to make it even more useful spot frequencies including the WARC bands 80 pages £1.95 85 pages E2.95.

25 SIMPLE INDOOR AND WINDOW AERIALS (BP136) OSCILLOSCOPES. HOW TO USE THEM, HOW THEY WORK 3rd Edition E. M. Noll Designs for people who live in flats or have no gardens, etc., giving len Hickman surprisingly good results considering their limited dimensions 64 pages. E1.75 This book describes oscilloscopes ranging from basic to advanced models and the THE ARRL ANTENNA COMPENDIUM (USA) accessories to go with them. £14.95 Volume One 25 SIMPLE SHORT WAVE BROADCAST BAND AERIALS (BP132) Fascinating and hitherto unpublished material Among the topics discussed are TRANSISTOR RADIO FAULT FINDING CHART (BP70) quads and loops, log periodic arrays, beam and multi -band antennas, verticals and E. M. NollDesigns for 25 different aerials, from a simple dipole through helical designs to a multi -band umbrella 80 pages. £1.95 C. E. Millar reduced size antennas175 pages £9.50 Used properly, should enable most common faults to be traced reasonably 25 SIMPLE TROPICAL AND MW BAND AERIALS 1BP145) quicklySelecting the nooropriate fault description at the head of the chart, the THE ARRL ANTENNA COMPENDIUM (USA) reader is led throun' 'cuence of suggested checks until the fault is cleared. Volume Two E. M. Noll Simple and inexpensive aerials for the broadcast bands from medium 635 x 455mm (app. . £0.95 Because antennas are a topic of great interest among radio amateurs, ARRL HO wave to 49m 64 pages £t.75 continues to receive many more papers on the subject than can possibly be published in OPT Those papers are collected in this volume. 708 pages E9.50 COMPUTING

THE RADIO AMATEUR ANTENNA HANDBOOK FAULT FINDING AN INTRODUCTION TO COMPUTER COMMUNICATIONS 1131,177) William I. Orr W6SAI & Stuart. D. Cowan W2LX R. A. Penfold Yagi. quad, quag,. i -p. venicay horizontal and antennas are all covered ARE THE VOLTAGES CORRECT? Details of various types of modem and their applications, plus how to interconnect Also towers, grounds and rotators190 pages E6.75 Reprinted from PW 1982-1983 computers, modems and the telephone system. Also networking systems and ro se a m in meter to fault -find on electronic and radio equipment, from RTTV 96 pages £2.95 WIFB'S ANTENNA NOTEBOOK simple resistive dividers through circuits using diodes, transistors, rc.s and Doug DeMaw W1FB valves44 pages £1.50 This book provides lots of designs, in simple and easy to read terms, for simple wire MORSE and tubing antenna All drawings are large and clear making construction much GETTING THE MOST FROM YOUR MULTIMETER (BP239) easier124 pages £6.95 R. A. Pentold INTRODUCING MORSE This book is primarily aimed at beginners.It covers both analogue and digital Colluded Articles from PW 1902-1985 WIRES & WAVES multimeters and their respective limitations. All kinds of testing is explained too. Ways of learning the Morse Code, followed by constructional details of a variety Collected Antenna Articles from PW 1980-1984 No previous knowledge is required or assumed107 pages £2.95 of keys including Iambic, Triamhic, and an Electronic Bug with a 528 -bit memory Antenna and propagation theory. including NBS fags design data Practical 48 pages. £1.25 designs for antennas from medium waves to microwaves, plus accessories such MORE ADVANCED USES OF THE MULTIMETER 1BP265) as atus, s rand power meters and a noise bridgeDealing with NI. R.A. Pentold THE SECRET OF LEARNING MORSE CODE 160 pages. £3.88 This boor is primaoiy intended as a follow-up to BP239. Getting the most from Mark Francis your Multimeter By using the techniques described in this book you can test and Designed to make you proficient in Morse code in the shortest possible time, this 25 SIMPLE AMATEUR BAND AERIALS (BP125) analyse the performance of a range of components with lust a multimeter (plus book points out many of the pitfalls that beset the student. E. M. Noll Flow to build 25 simple and inexpensive aerials, from a simple dipole a very few inexpensive components in some cases) The simple add-ons described 87 pages. E4.95

G2VF LOOP ANTENNAS WTTH ATU FOR HF HAM BAND TRANSMISSION YORKSHIRE Kenwood (SWR One to One 40, 15 and 10 One Point Five to One 80 and 20) AND SWLLs LONG AND MEDIUM WAVE FOR BCLs. Loops 21 inches square or triangle. No speical YAE5U skills required. Circuits, Parts Lists sources of supply assembly data. HIGH Alan Hooker Radio Communications FREQUENCY LOOP 80 to 10 Metres £5. LONG AND MEDIUM WAVE LOOP FOR BCLs O £3. LONG MEDIUM SHORT WAVE LOOP 1500 to 10 METRES FOR BCL SWL £8. 42 Netherhall Road, Doncaster. SHORT WAVE ATU LOOP OR LONG WIRE £4. PRE AMP LW MW S WAVE £2 ICOM PHOTOCOPY HRO MANUAL £4. MW LOOP WITH PRE AMP ATU £3. PRE AMP FOR Tel: (0302) 325690 Open: Mon -Sat 10-5pm & most G2VF HF LOOP OR ATU £4. SHORT WAVE ATU BUILT-IN PRE AMP FOR LOOP OR Closed Thursdays. LONG WIRE £7. SAE details. All projects D.I.Y. METAL DETECTOR £2. F. G. Rylands, Scanners 39 Parkside Avenue, Milbrook, Southampton SO1 9AF. Tel: (0703) 775064.

HIGH POWER TRANSMITTER VALVES Klystrons, Magnetrons, 4CX350A, 4CCX1000A, 4CX250B QY3-125, QY4-250, IBM PC SOFTWARE etc. One million valves in stock. Phone or fax for quote, discounts for large value RTTY, AMTOR, CW (Tx and Rx)SSTV, inquiries. Orders from manufacturers, Govt. Depts., overseas etc., welcome. BY G4BMK WANTED VALVES ESP. KT66, KT88, PX4, PX25, Klystrons, Magnetrons, FAX, Audio Analyser (RX only). See Transistors, I.C.s. If possible send written list - we reply same day. Cash waiting. review PW June 1990 Page 66. A high performance multimode program BILLINGTON EXPORT, Oakendene Industrial Estate, Near Horsham RH13 8AZ. for IBM PC compatibles, £80 complete. Any mix of modes to your choice Callers by appointment only. Tel: (0403) 865105 FAX: (0403) 865106. Minimum - send SAE for details and prices. order £50 (UK/export) + VAT. ATARI ST RTTY, AMTOR, CW and Analyser for Atari ST/STE works with hi -res or medium res display. £49. Printed manual £5. Use with ST5 Versaterm ALL Phone for a etc, or our matching built T.U. £56. most courteous quotation State callsign, if any, and disk size with order. Add £1 P&P. VALVES 081-743 0899 & TRANSISTORS We are one of the largest stockists GROSVENOR SOFTWARE (SWM) of valves etc, in the U.K. 2 Beacon Close, SEAFORD, East Sussex, BN25 2JZ Tel: (0323) 893378 COLOMOR (ELECTRONICS) LTD. LONDON W128HROAD

AOR UK 22 Radio Research 70 ARE 60 INDEX TO ADVERTISERS Radio Shack 78 ASK 68 EMP 67 Klingenfuss 77 Rapid Results College 73 Aerial Techniques 73 ERA. 77 Raycom 60 Air Supply 70 Elliott Electronics 54 Lake Electronics 73 Rylands, F G 76 Alyntronics 71 Link Electronics 72 Amateur Radio Comms 46 Flightdeck 73 Lowe Electronics SRP Trading 69 Amdat 33 Flying Shop, The 46 Cover iii, 8, 9, 30, 31 Sigma UK 46 Audio Video Care 29 Martelec 29, 45 Solid State Electronics 72 Garex Electronics 71 South Midlands Billington Valves 76 Grosvenor Software 76 Martin Lynch 13 Bredhurst Electronics 66 Medium Wave Circle 70 Communications 26 Stephens James 59 Hooker, Alan 76 Nevada Coveri, 20, 21 Chevet Books 71 Howes C.M Communications ...77 Colomor Electronics 76 Technical Software 78 Comer 72 ICS Electronics 25 PWP Limited 78 Timestep 71 (corn (UK) 2, 3, Cover iii Photo Acoustics 55 Interbooks 45 Practical Wireless 70 Datong 45 Waters & Stanton 19 Dewsbury 29 J & P Electronics 72 R & D Electronics 73 Dressler Communications 66 Javiation 59 RGW Electronics 70

PUBLISHED on the fourth Thurday of each month by PW Publishing Ltd., Enefco House, The Quay, Poole, Dorset BH15 1PP. Printed in England by BlackmorePress, Shaftesbury, Dorset. Tel: 0747 53034. Distributed by Seymour, Windsor House, 1270 London Road, Norbury, London SW16 4DH, Tel: 081-679 1899, Fax: 081-679 8907, Telex: 881245. Sole Agents for Australia andNew Zealand - Gordon and Gotch (Asia) Ltd.; South Africa - Central News Agency Ltd. Subscriptions INLAND £21.00, EUROPE £23, OVERSEAS (by ASP) £25, payable to SHORT WAVE MAGAZINE, SubscriptionDepartment, PW Publishing Ltd., Enefco House, The Quay, Poole, Dorset BH15 1PP. SHORTWAVE MAGAZINE is sold subject to the following conditions, namely that it shall not, withoutthe written consent of the polishers first having been given, be lent, re -sold, hired out or therwise disposed of by way of trade at more than the recommended selling priceshown on the cover, and that it shall not be lent, re -sold, hired out or otherwise disposed of in a mutilated condition or in any unauthorised cover by way of Trade, or affixed to or as part of anypublication or advertising, literary or pictorial matter whatsover. 76 Short Wave Magazine, November 1991 GUIDE TO FACSIMILE STATIONS ENTERPRISE 5 Clarendon Court Winwick Quay 11th Edition 408 Pages £19 or DEM 50 RADIO Warrington The recording of FAX stations on LW and SW and the reception of meteo satellites are fascinating fields of radio monitoring. State-of-the-art hard and AAPPLICATIONSWA2 8QP software connects a radio receiver directly to a laser printer. The result is top Tel: (0925) 573118 quality press photos, satellite pictures and weather charts. LTD. The new edition of our FAX GUIDE contains not only the usual up-to-date MK.II MICROREADER frequency lists and transmission schedules of all stations worldwide, it informs The easiest way to receive CW & RTTY without all you particularly about new FAX converters and programs on the market, and the fuss of computers. Just plug into your speaker includes the most comprehensive international survey of the "products" of socket and switch on. The Microreader weather satellites and FAX stations from all over the world. 312 sample charts automatically decodes both amateur and and pictures were recorded in 1990 and 1991. There are special charts for commercial stations displaying the received text on aeronautical and maritime navigation, agriculture and the military, barographic soundings, climatological analyses, and long-term forecasts, which are its own LCD screen. The Microreader also incorporates a MORSE TUTOR available nowhere else. facility that allows you to check both your receiving and sending performance. £170.00 Additional chapters cover: BP34 AUDIO FILTER

List of 341 frequencies monitored in 1990 and 1991. Someone once said that this filter is too good for Exact schedules of 86 FAX stations on 313 frequencies. amateur radio use. We, along with hundreds of Geostationary and polar -orbiting meteo satellites. Schedules of GMS (Japan), GOES -East and West (USA), and METEOSAT (Europe). BP34 users would disagree. The BP34 combines Technique of FAX transmission. International regulations. ease of use with a degree of performance not

Lists of abbreviations, addresses, and call -signs. Test charts. found in any other filter. Exceptionally sharp cut off and guaranteed 80dB Further publications available are Guide to Utility Stations 19th ed.l. stopband attenuation make this filter a must for the more serious user. Air and Meteo Code Manual and Radio -teletype Code Manual (11th ed.). £109.50 We have published our international radio books for 22 years. They are in daily RS232 DISPLAY use by equipment manufacturers, monitoring services, radio amateurs, Don't tie up your computer while monitoring. This new unit will display, store shortwave listeners and telecommunication administrations worldwide. Please and print messages sent via the RS232 ask for our free catalogue, including recommendations from all over the world. For a Decode book review see SWM 8/90. All manuals are published in the output from the MICROREADER or handy 170 x 240mm format, and of course written in English. PACKET TNC. Text is stored in memory and at the same time displayed on the Do you want to get the total information immediately? For the special price of large 160 character backlit screen. A £84/DEM 235 (you save £15/DEM40) you will receive all our manuals and supplements (altogether more than 1600 pages!) plus our Cassette Tape unique scrolling facility allows you at any - Recording of Modulation Types. time to scroll back and forth through over fifty screens of text messages while still receiving data. The display Our prices Include airmail postage to anywhere in the world. Payment can be incorporates a PARALLEL PORT that allows printing of all or selected sections by £ or DEM cheque, cash, International Money Order, or postgiro (account Stuttgart 2093 75-709). Dealer enquiries welcome - discount rates and pro forma of text at the touch of a button. £185.00 invoices on request. Please mail your order to BP12 DATA FILTER A compact low power filter specifically designed for data Klingenfuss Pulications applications such as CW, RTTY & HF PACKET. Both audio Hagenloher Str. 14 and TTL tone data outputs are provided. Ideal for use with D-7400 Tuebingen computers. £44.00 Germany All products are guaranteed for two years and all prices include VAT 1V/SA Tel: ++ 49 7071 62830 and postage and packing.

Mail order to: EYDON, DAVENTRY C.M.HOWES NORTHANTS NN11 6PT COMMUNICATIONS VISA Tel: (0327) 60178

RECEIVER KITS KITS Assembled PCB WIDEBAND PRE -AMP DXR10 3 Band (10,12 & 15m) for DX amateur work £26.60 £39.90 DcRx545.4MHz HF Aircraft band (rescue etc) £15.90 £22.70 FOR SCANNERS DcRx20. 40 or 80m Single band amateur receivers £15.90 £22.70 TRF3 Simple Shortwave Broadcast receiver (TRF) £15.50 £21.70 Low -noise Microwave IC. lids Attenuator Switch RECEIVER ACCESSORIES AA2 150kHz to 30MHz active antenna £8.50 £12.90 «12 to 14V DC ASL5 Externally fitted SSB and CW audio filter £15.90 £24.60 CSL4 Extra SSB/CW filtering for our receivers £10.50 £17.40 CTU30 All HF bands and 6M ATU (up to 30W TX) £31.50 £38.40 CV100 HF to VHF converter for scanners £26.50 £37.90 CBA2 Buffer for adding counter to our SSB/CW RXs £5.90 £9.50 Interface Module Scanning Receiver DFD5 Digital frequency counter/display £41.50 £64.50 DCS2 "S meter" for our receiver kits £9.20 £13.80 HOWES SPA4 4-1300MHz XM1 Crystal frequency calibrator (8 markers) £16.90 £22.80 The HOWES SPA4 wide -band pre -amplifier is designed to add extra gain to passive antennas (discone, nested dipoles etc.). The low noise combined with at least 15dB of gain over the whole frequency range overcomes the losses in the antenna's down lead, and adds extra sensitivity to the scanning receiver.

The SPA4 uses advanced technology adapted from our very popular AA4 active antenna. Now you can add this extra performance to your discone!

* Fully broad -band covering 4 to 1300MHz * Low noise microwave IC (NF <3dB). Over 15dB gain. IP3 +15dBm. TRANSMITTERS AND HARDWARE * Coax powered pre -am. 12 to 14V DC at less than 20mA. All our amateur band receivers can be combined with a matching transmitter kit and * 10dB switched attenuator on the receiver interface board. accessories to form a transceiver. Your home-brew rig could look like the one in the Pre -amp only 40 by 28mm. Easy -to -build kit or ready -built modules. * picture with our new "M Series" hardware packages. If you would like to improve your scanner reception, and you already own a passive broadband antenna, then the HOWES SPA4 could be just what you need to boost those PLEASE ADD £1.20 P&P to your total order value (£3.00 for hardware). weak signals. SPA4 kit: £14.90 Assembled PCB modules: £20.90 HOWES KITS are produced by a professional RF design and manufacturing company. Weatherproof (IP65) case for outdoor pre -amp mounting. £6.90 They contain a good quality printed circuit board with screen printed parts locations, full clear instructions and all board mounted components. Sales and technical advice AA4 ACTIVE ANTENNA for scanners. The HOWES AA4 Active antenna gives full coverage are available by phone during office hours. Please send an SAE for our free catalogue from 25 to 1300MHz in a neat compact unit. The answer to antenna space/visibility or specific product data. problems for home, holiday and portable operation. Reviewed in the November '90 Short Wave Magazine. Excellent performance in a small space! 73 from Dave G4KQH, Technical Manager ...AA4 Kit: £19.80 Assembled PCB modules: £26.80

Short Wave Magazine, November 1991 7 7 SERVICE MANUALS BUSH GRUNDIG BC6240 Svc Man CTV 1.50 2222 Svc Man CTV 2.50 BRC 200 Series Svc Man CTV 3.50 2252 Svc Man CTV 2.50 BC6468 Svc Man CTV 1.50 RADIO SHACK 4210 Svc Man CTV 2.00 TECHNICS 4220 Svc Man CTV 2.50 SL -P1 Svc Man CD Player 2.00 4230 Svc Man CTV 2.00 8240 Svc Man CTV 3.00 SL -P8 Svc Man CD Play 2.00 SL-QD2 Svc Man Turn 1.00 9260 Svc Man CTV 3.00 SL-BD3 Svc Man Turn ,1.00 5011 Svc Man CTV 1.50 Short Wave Receivers 5011UE/GB Svc Man CTV 1.50 SL-Jl Svc Man Turn ,1.00 R500GB Svc Man MTV 1.00 SANYO 6010 Svc Man CTV 1.50 All of the equipment we sell has CTP370/371 Svc Man CTV 1.50 DECCA CTP430/431 Svc Man CTV 1.50 37 Series Svc Man CTV 1.00 CTP1101 Svc Man CTV 1.50 been imported by the factory 80 Series SvcMan CTV 1.00 CTP6131 Svc Man CTV 1.00 C20307 Svc Man CTV 1.00 CTP6130 Svc Man CTV 1.00 C26306 Svc Man CTV 1.00 authorised distributors with PHILIPS DS9000 Svc Man Stereo CTR 1.50 N1512 Svc Man VCR 4.00 Descant PR207 Svc DataPort Rad .0.50 611 Chassis Field Svc info CTV 2.50 full warranty back-up 37 KT 2060 Svc Man CTV 0.50 ABBREVIATIONS 520 Series Svc Man CTV 3.00 RAD Radio and parts service. VR2075 Svc Man CTV 3.50 MTV Mono TV VR2340 Svc Man VCR 3.50 Turn Turntable VR6462.PPF Svc Man VCR 3.00 Svc Service Lowe HF-225 High performance compact receiver £425.00 PYE Man Manual Kenwood R-2000 10 Memories £595.00 176 Svc Man MTV 1.00 Port Portable Kenwood VC -10VHF converter for R-2000 CT 70171 Svc Man CTV 2.50 CTV colour TV £161.00 KT3 Chassis Svc Man CTV 3.00 T/T Teletext Kenwood R-5000Top of their range receiver £875.00 Dir/dry Direct Drive System 4 Tech Svc Man CTV ...10.00 Kenwood VC -20VHF converter for R-5000 £167.00 Sys System PANASONIC CTR Cassette Tape Recorder Yaesu FRG -8800Fine performing all mode set £649.00 NV788 Svc Hints VCR 1.50 Yaesu FRV-8800VHF converter for above £100.00 NV788 Svc Man VCR 3.50 Payment or part payment with NV788 Training Man VCR 2.00 stamps is accepted to a maximum Icon] IC-R71E The old favourite £855.00 NV2000 Svc Man VCR 3.50 value of 99p. No single stamp over Icon] IC-R72E 'corn's latest, small & excellent £645.00 TC2203 Svc Man CTV 2.50 24p please. TC2207 Svc Man CTV 2.00 Icon] IC -R9000 The set with everything £3,995.00 We have lots more available from manufacturers, Hitachi, Dynatron, Fer- JRC-535 The latest from Japan Radio Campany £1,095.00 guson, ITT, Mitsubishi, Murphy, Radio Mobile, Sharp and Thorn. From 50p each. For full list, send 7" x 5" and SAE to address below. (Please allow 28 days for delilvery. SCANNERS FROM RADIO SHACK Postal Oders and Cheques made payable to: PWP LTD SUPER BARGAINS IN Box No. 21, Enefco House, The Quay, POOLE, Dorset BH15 1PP REALISTIC SCANNERS! PRO -38 10 Channel handy scanner (£99.95) £79.95 PRO -2022 200 Channel search & scan (239.95) £199.95 PRO -2024 60 Channel search & scan (£179.95) £99.95 PRO -37 200 Channel handy search & scan (£249.95) £229.95 NEW PRO -2006 400 Channel with fabulous performance £329.95 with FREE discone (worth £49.95) FAX and WEATHER SATELLITES AR -950 Base/mobile scanner £249.00 Full resolution charts and greyscale pictures from any SPEC- AR -2000Series II 0.5-1300, 1000 memories £249.00 TRUM computer to a dot matrix printer. Basic system £40 plus AR -200225-550 & 800-1300MHz £487.00 interface for FAX £40 or WX SATS £59. AR -3000All mode scanner 100kHz-2036MHz £765.00 Kenwood RZ-1 Wide band coverage £275.00 APT -1 WEATHER SATELLITE MODULE Icon] IC -R7000 25-2000 high performance receiver/scanner £895.00 Enables all weather satellite signals to be displayed on any Icon] R-1 100kHz-1300MHz 100 memories handy £369.00 FAX system. Plugs into RX-8 system direct. £59 or £39 if Icon] R-100 High performance base/mobile £485.00 ordered with RX-8. Black Jaguar AM/FM handy scanner £199.00 Bearcat UBC-200XLT 200 memories £229.00 RX-8 8 - MODE RECEIVE Jupiter MVT-7000 Hand-held 100 memories £289.00 Every possible feature and performance to receive FAX, HF & Jupiter MVT-6000 Base/mobile version £299.00 VHF PACKET, COLOUR SSTV, RTTY, CW, AMTOR, UoSAT and Fairmate HP -200E Wide band 100-600 & 805-1300kHz £269.00 ASCII on anyBBCcomputer. Reviews Oct. 89 Ham Radio Carriage free in U.K. Call us for our tax free export prices. Today and July 91 Rad Comm. Complete system of EPROM, interface, instructions, leads and demo cassette £259. We will be pleased to quote you for RX-4 RTTY CW SSTV AMTOR RECEIVE anything you require in the commu- Performance, features and ease of use make this still a best seller. Needs TIF1 interface.BBC, CBM64tape £25, disk £27. nications and computer field. We are VIC20 tape £25.SPECTRUMtape £40, + 3 disk £42 inc adaptor pleased to hear from you and see you. board (needs TIF1 also) or software -only version £25. TIF 1 INTERFACE has 4 -pole filtering and computer noise isolation We aim to give you the attention you for excellent HF and VHF performance. Kit £30, ready-made, deserve, so please call before you boxed with all connections £40. Available only with software. come along. AlsoMORSE TUTOR£8,LOGBOOK £8, RAE MATHS £8for BBC, CBM64,VIC20 andSPECTRUM. BBC LOCATOR with UK, Europe, World maps £10. Disk £2 extra for all. 73sTerry Edwards G3STS Lots of information available about everything, please ask. Prices include VAT and p&p by return. RADIO SHACK LTD VISA technical software(sWM) 188 Broadhurst Gardens, LONDON NW6 3AY Fron, Upper Llandwrog, Caernarfon LL54 7RF (Just around the corner from West Hampstead Tel: (0286) 881886 Station on the Jubilee Line) Tel: 071-624 7174Fax: 071- 328 5066 78 Short Wave Magazine, November 1991 7 l11 U U _i S

Fillinthe order form on page 80 in BLOCK CAPITALS - up to a maximum of 30 words plus 12 words for your address - and send it, together with your payment of £2.35, to Trading Post, Short Wave Magazine, Enefco House, The Quay, Poole, Dorset BH15 1 PP. If you do not wish to cut your copy of SWM, or do not wish to WANTED Parmeko transformer use the order form provided, you must still send the corner flash or your subscription number as proof of model 6000/8 and Leak TL25 am- purchase of the magazine. Advertisements from traders, apparent traders or for equipment which it is plifier. Tel: (0661) 852874 evenings. illegal to possess, use or which cannot be licensed in the UK will not be accepted.

FOR SALE Military Airband Listen- SEE THE END OF TRADING POST FOR A SPECIAL OFFER. YOUR AD' COULD APPEAR IN OUR SISTER ers. I have frequency logs for sale PUBLICATION PRACTICAL WIRELESS AS WELL, REACHING ANOTHER 25000 POTENTIAL BUYERS. covering 118-136 and 225-400M Hz in 25kHz steps. Keep your fre- quencies in order! Plus provision FOR SALE Sony PRO -80 scanner FOR SALE collector'sitem FOR SALE Realistic PRO -2022 200 at rear for a/field channel lists. with airband and 8 -way tuning Eddystone S640 receiver 1.7- channel scanner, hardly used, 8 £5.00 to T. Ford, 94 Everingham 150kHz-108MHz and 115-223MHz 31MHz requires replacement of months old, boxed with manual, Road, Sheffield S57LG. Do I have a with AC-D4M power adaptor, one tuning drive cord otherwise £160 o.n.o. Also Advanced Morse frequency you've been searching case, earphone, boxed with full working condition, few spare trainer MMS2 with instructions for? manual, mint condition, £200. valves, £90 inclusive of carriage plus Morse key,£75 o.n.o. Tel: 021-

WANTED Signal R-5375 Heathrow o.n.o. Peter Dawson. Flat 4, 1 354 2815 Sutton Coldfield, Bir- FOR SALE Sangean ATS 803A Mkl I crystals. Chris. Tel: (0753) 840534 Swan Lane, Stroud, Glos GL52HF. mingham. world band receiver plus mains Windsor. adaptor, boxed, as new, £80. FOR SALE Yaesu FRG -8800 mint, FOR SALE Vintage equipment. W/ Eddystone EC10 Mkll communi- FOR SALE FRG -8800, £500. ERA boxed, with FRT-7700 tuner, FRV- S 19 Mklll (Russian Legends), cations receiver plus 12/9V adap- Microreader tutor, £80. Realistic 7700 converter,£430. May accept R1155, R1475, R209, R216, HRO, tor, £40. Good working order. Jed. v.h.f./u.h.f.5in b/wTV,f50. Labgear latest model scanner in part ex- Redifon GR-361 TX/RX, £50 each Tel: (0799) 584223 South Cam- u.h.f. to v.h.f. converter, £20. If all change. Buyer collects or ar- o.n.o. T19.ARC5 command trans- bridgeshire. together, £600. Reg Vickers. Tel: ranges 'RV' reasonable distance mitter,£20, BC221,£15, VCR97tube, (0532) 661348 Leeds. from Bristol. Tel: (0272) 861589. £5, No.10 calibrator,£10.Tel: (0704) FOR SALE Realistic PRO 2005 64398 Southport. scanner boxed as newwith Tandy WANTED Hallicrafters SX-28 re- FOR SALE Kenwood R2000 re- discone antenna (new) and mag ceiver (550kHz-42MHz) in good ceiver purchased new in March FOR SALE Yaesu FT -101 trans- mount, £175. Tel: 081-992 8143 condition, with manual if possible. and used only minimally, 1991 ceiver Tranz Match s.w.r. bridge, Ealing. PJarrett.Tel: (0628) 485671 Bucks. WRTHandPWBRhandbooks, spare valves, mic, manuals, very £495. No offers. Tel: (0202) 892986 good condition, only £150. Buyer FOR SALE Yaesu FRG -8800 gen- FOR SALE Globe I a.t.u. AT1000,£40. Bournemouth. collects. Tel: (0204)43589 Evenings eral coverage receiver 0.15- Maplin active a.t.u.,£50150-30MHz Bolton. 29.999MHz plus 144MHz module cased. Cirkit automatic NiCad FOR SALE Sony ICF-2001D re- 118-174MHz, £500 o.n.o. Tel: 061- cycler battery charger, 8 cell pack ceiver, £165. Tel: (0767) 314381 FOR SALE Trio 9R-59DS with cov- 491 3755 after 6pm. and 4cell,f35. Buyer collects. Tel: Bedfordshire. erage from 550kHz to 30MHz in- (0379) 652880. cluding speaker and spare set of FOR SALE Bearcat UBC200XLT FOR SALE Sony ICF-7600D re- valves, £35. Buyer collects. Tel: v.g.c. complete with charger and EXCHANGE HS WX2 two months ceiver, £75. WANTED FRV-8800 (0268) 550131 Essex. case,£120o.n.o.Also Mapsatv.h.f. old and Diawa 9.2A power supply or FRV-7700 or FRT-7700 a.t.u. Will weather sat RX, cased, v.g.c., £40 unused for PR02002 scanner. Also exchange with cash adjustment. EXCHANGE AOR2000 scanner 3 o.n.o. John G6YRB. Tel: (0695) want J -Beam 4 -el quad in good Tel: (0244)831138 Deeside,Wales. months old for PK232 MBX or sell 33499 evenings and weekends. condition or w.h.y. Tel: (0670) for £200. Paul. Tel: (0780) 83458 855953 anytime. FOR SALE AOR 1000 hand-held shifts so keep trying! FOR SALE Amstrad 2086 colour scanner as new in box complete monitor 30Mb HD lots of software, FOR SALE RA17L over -hauled, ex- with NiCads, mains and car FOR SALE Trio R2000 receiver with excellent condition, £200. Spec- cellent condition, new valves, charger, antenna, instruction VC10 v.h.f. adaptor, very good trum 48K circuit board, Rotronics spare set,£230. Marconi TF2950/5 book, etc., £180. Tel: Warrington condition plus box and manual, Wafadriveplus 16wafers, mobile radio test set, £350. Pye 574445. £360. Tel: (0538) 702215. Kempston printer interface,£40the PF85 u.h.f., £50. All with manuals lot. Tel: 0222 551392. o.n.o. BJ200 Mklll scanner wall FOR SALE AOR 2002 excellent WANTED Antenna telescopic charger £100. Dave. Tel: 081-858 condition, £260. Tel: (0252) 811774 mast or light -weight tower ap- EXCHANGE or FOR SALE FRG -7 1448 London SE3. Fleet. proximately 21m height, but may h.f. receiver0-30MHzwith 144MHz consider something smaller. Tel: v.h.f. converter, £150. Exchange FOR SALE JIM pre -amp 100m FOR SALE Philips D2935 World (05395) 32827 anytime Cumbria. fora ERA Microreader Mkl I. John. boxed, £50. Tel: 031-337 7384. Band receiver, 0.15-30MHz, a.m. Tel: 021-477 8163 anytime. including s.s.b. also f.m. wave- FOR SALE Sony ICF-2001 hardly FOR SALE Yaesu FRG -7700 re- band, digital tuning, boxed, im- used, £190. Realistic PR02004 FOR SALE Yaesu v.h.f./u.h.f. com- ceiver,FRT-7700antenna tuner, maculate condition, £85. Tel: scanner, modified for400 channels munications receiver FRG -9600 FRV-7700 v.h.f. converter, Yaesu (0494) 450432 High Wycombe. and fast scan, £180. JVC 610 5in hardly used, perfect condition, headphones, MM2000 RTTYto TV portable TV PAL/SECAM 5.5, 6 + £400 o.n.o. Steve. Tel: 091-2657086 converter all very good condition FOR SALEYaesu FT -726R 144MHz, 6.51.1Hz sound, £150. Tel: (0543) Tyneside after 6pm evenings. and in use. Best offer o.n.o., £300 430MHz with 10 -element anten- 252121 south-east Staffs. the lot. Tel: (0673) 843746. nas both bands, condensor mi- FOR SALE Panasonic BF3100L crophone, Yaesu YS -500 watt- FOR SALE Kenwood R-5000, three communications receiver, 32 FOR SALE FRG -8800 with v.h.f. meter standing wave bridge, filters fitted, mint condition, £700. bands inc f.m., I.w., m.w., b.f.o., converter and FRT-7700 antenna ready to go satellite communica- Icom R72 unused, perfect, £450. digital read-out, mains/battery, tuner,£450. Comax CD67- decoder tion system in first class new DX100 tele converter, as new,£50. good condition, £90. Tel: 051-625 with built-in display. Tel: (0271) condition, £450. Tel: (0253) 725499 Tel: 081-785 7314 evenings only 7654 Wirral. 812622 North Devon. or(0253)712769. Putney. Short Wave Magazine, November 1991 79 ir ? ( o//1/~,cJ

FOR SALE ERA Microreader Mkll AX700 scanner, Panoramic adap- verter(200/250Vd.c. input, 110/115/ FOR SALE NRD crystal filter CFL- little used, still under makers' tor, 50-905MHz, 100 memories, 2209/250V a.c. output), Truvox 2 - 233, 1.2kHz for RTTY, FAX, etc., guarantee,f100. Tel: (09241260682 £395. AOR1000 hand-held scanner, station radio jack (1950s?). 1942 very steep sides for 535 or 525. anytime West Yorkshire. £165 all boxed with usual acces- bound volume Wireless World, Boxed, mint,£65.Tel: 081-5705603. sories. Will consider part ex- 1970 Guide to Broadcasting Sta- FOR SALE Trio R2000 receiver with change for ICR-71E/R5000/NRD- tions. Any reasonable offers con- FOR SALE National Panasonic RF- VC10 v.h.f. adaptor, £450 o.n.o. 525. Peter. Tel: (0798) 872363 West sidered. Tel: (0483) 272331 eve- 800024-band f.m., a.m., I.w., marine TS120V SP120 VF0120 PS20, £400 Sussex. nings. bands, highly sensitive receiver, o.n.o. All equipment unmarked as £500 including postage. Tel: (0695) new, buyers collect. Stuart 0400K FOR SALE Trio TR2500, 144MHz FOR SALE BBC -B computer with 28945. QTHR. Tel: (0642) 211685. hand-held, with 2 battery packs, 40/80track dual drives, Centronics charger, speaker mic, 12V d.c. printer, mono monitor and Tech- FOR SALE Sony ICF-2001D plus FOR SALE Icom IC-R71E 0-30MHz converter, antenna, manual. RX nical Software's RX4, TX3 and Lowe active antenna, 150kHz- communications receiver boxed 140-180MHz, £130 or part -ex Morse tutor programs (and hard- 30MHz with airband, excellent as new, immaculate condition, scanner. GM8GIQ. Tel: Troon ware). Computer housed in pro- condition, boxed, £250. Tel: (0282) £530 o.n.o. Datong model PC -1 316300. fessional Viglen 'PC' case, £265. 30104 Burnley, Lancashire. general coverage converter v.h.f. Trio TR9130 144MHz multi -mode, to s.w. good condition, £75. Chris. FOR SALE AOR 1000 plus D130N £250. Mr Jones. Tel: (0604) 37769 Tel: (0992) 583007 Hertford. discone, £200. Eddystone EC10 day or (0327) 842086 evenings SPECIAL OFFER Make room in the Mk2, £50. Tandy 100T, 40 channel, Northants. shack for all those Christmas FOR SALE Icom IC -R72 communi- CB hand-held plus accessories, goodies you'll no doubt have cations receiver 100kHz-30MHz £50. All equipment as new, boxed. FOR SALE Newbrain computer written to Santa about! Advertise s.s.b., a.m., c.w. modes, 3 months Buyer collects or carriage extra. Z80A processor. Also technical your gear in Trading Postfor£2.35 old, external Icom speaker, £500 Tel: (0246) 415667 after 5pm. manual, suit enthusiast, buyer OR advertise in Trading Post and o.n.o. Eric Orchin. Tel: (09603) 82607 collects from Clwyd, £30. Tel: 061- Bargain Basement (in Practical evenings. FOR SALE Sony 2001D receiver 707 3905. Wireless) for just £4. Your advert plus AN1 active antenna, boxed, will be seen by more potential EXCHANGE Diamond Back Moun- immaculate, £220 o.n.o. Tel: (0277) FOR SALE ERA Mkll Microreader, customers. tain bike, 21 gears, chainset 212822 Essex. £100. Also ERA BP34 filter, £80, brakes, gears all Simano colour both new. Datong Active Antenna Send your adverts into the usual black for h.f. communications re- WANTED AR3000 (or 2500) cash D370,£25. Kenwood HS-5'phones, address with either payment for ceiver, Kenwood, Yaesu or Icom waiting. Also JIM M75 or 100 pre - new, £25.00. Also G4ZPY key, £15. with digital frequency read-out. Mr £2.35 or £4, depending on where amp. FOR SALE Realistic PRO -2006 Stone. Tel: (0843)228321. Consider you would like your advert to ap- M Wood. 326 Mill Road, Deal, Kent 25-1300MHz 'Hypascan' 400 offers. pear, and leave the rest to us. All CT14 9BQ. channel. memories, priority, a.m., adverts will appear as soon as f.m., f.m. wide, boxed, mint, £245 FOR SALE NRD crystal filter CFL- possible. Usually, adverts arriv- FOR SALE AOR3000 multi -band (cost £350). Tel: (0279) 429543 Es- 251, 2,4kHz, improves 'inter' posi- ing before the 20th of the month scanning receiver, a.m./s.s.b., sex. tion selectivity/shape for 535 or will appear in the Short Wave n. b.f. m./w.b.f.m./ 100kHz-2036M Hz, 525. Boxed, mint, £55. Tel: 081-570 Magazine on the book -shelves 400 memories, £595. Standard FOR SALE Valradio d.c./a.c. con- 5603. about four or five weeks later.

TRADING POST ORDER FORMPLEASE WRITE IN BLOCK CAPITALS

Please insert this advertisement in the next available issue of Short WaveMagazine. A photocopy of this form is acceptable, I enclose Cheque/P.O. for £ (£2.35) or £4 for Short Wave Magazine and Practical Wireless. but you must still send in the corner (Cheques and Postal Orders should be made payable to Short Wave Magazine). flash below, as proof of purchase.

Name

Address

(30) VISA

Signature Expiry date of card

SWM NOVEMBER 91 TP (42)

80 Short Wave Magazine, November 1991 0 ICOM ICOM are proud to introduce the IC -R72 Communications Base Receiver to complement the IC -R100 Mobile and IC -R1 Handheld receivers giving the enthusiastic listener a full choice.

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PHONES MEMORY -CH

DOWN UP

AGC PREAMP 10dB-ATT-20dB CLOCK MODE SET DIMMER LOCK

Features: IC -R72 Communications Receiver Direct Frequency IC -R72 Communications Receiver entry ICOM's communication receivers have a reputation fo 99 Memory reliability and quality. Building on this reputation the Channels IC -R72HF receiver is one of a new line of wideband Built-in clock receivers to satisfy listeners everywhere. and timer This compact receiver has continuous coverage from 100kHz-30MHz, in SSB, AM and CW modes. An AC/DC operation optional UI-8 adds FM reception. The easy to operate Noise Blanker IC -R72 is superb for beginners or experienced DX'ers Pre -amp and alike and is equipped with a variety of functions. The IC -R72 joins ICOM's current line of quality Attenuator receivers. For a free brochure on this or any other ICOM's DDS system ICOM Amateur Radio product contact your local (direct digital authorised ICOM dealer or ICOM (UK) Ltd. synthesiser)

Wont N1ULtd Dept. SW, Sea Street, Herne Bay, Kent CT6 8LD. Tel: 0227 741741. Fax: 0227 360155. Visa & Mas trcardsTelephone orders taken by mail order, instant credit & interest -free HP. Despatch on same day whenever possible.~ MICROSAT-3 It is truly a stunning experience watching the world To complete the system, comprehensive software is unroll before your eyes - and that is what you can see included which allows you to be up and running as soon when you have the facility to receive weather pictures as you have completed the simple installation. direct from space. In the past, reception of Meteosat and similar geostationary satellites has only been available Powerful software includes image storing for time-lapse for professional users, but with the introduction of the weather observation, location identifying from lat/long, new MICROSAT-3, anyone who owns a PC compatiblecomplete satellite schedules and simple enjoyment; computer and a clear view of the sky can watch old check on the BBC weatherman to see if he's right. Mother Earth roll by in glorious technicolour. For further details, contact Matlock or, better still, call in The MICROSAT-3 is a high performance weather satel-and see the system in operation. This system is abso- lite receiving system made up of three units - lutely the best you can buy. 1) The High Gain (40dB) Dish and Low Noise Head Unit 2) The RX-1700 Receiver (needs a simple 12Vdc supply) 3) The Decoder Card which fits any option slot of a PC. (Trade enquiries invited) LOWE ELECTRONICS LIMITED

Chesterfield Road, Matlock, Derbyshire DE4 5LE Tel: 0629 580800 Fax: 0629 580020 InZJtiu I Barry (S Wales): 0446 721304 *Bournemouth: 0202 577760 Bristol: 0272 771770 `UO1oIBERSHwcARo

Cambridge: 0223 311230 Cumbemauld: 0236 721004 *Darlington: 0325 486121 100000

I London (Heathrow): 0753 545255 London (Middlesex):081-429 3256 *Closed all day Monday 1

ÍJ AUTUMN 1991 £1 WHAT SCANNER Comprehensive details of available makes

WHAT IS A SCANNER? The scanner explained

COMP TI TION Enter d win an AR -2000 scanne MÁRINBAND FREQUENCIES ON THE FAIRM TE 100

NkWSCAN JILINCOc Cracking New Baby 5,canner DJ -X1. 500kHz-1.3GH2 "AScanner of Unrivalled Performance"

Specification: Modes: AM/Narrow FM/Wide FM A,5 taa`.` Steps: 12 .5, 20, 25, 30, 50, 100kHz Antenna: 5, 9, 10,BN Q ee _.ti`e Supply: 6-15V DC (Internal 9V AA) fa'I.° ..P (2'1-aga ..k%.,,oQ 24mx53 save.) Gj```;ov(eye Dimensions: 110 xttery37mm `eJe41 Weight: 370g ,5e` osaga Configuration:AM/FM Triple conversion yaA`' Sensitivity: NBFM -8dB (12dB SINAD) AM -2dB (10dB S/N) Memories: 100 in banks.

The DJ -X1 scanner represents a major step forward in scanner design. It heralds the era of the compact monitor receiver that really can be termed "pocket size". Alinco have managed to produce a receiver that has now, been kept a close secret even to those in the industry. Recognising the fact that most handheld scanners are too large to be carriec inconspicuously, ALINCO set about designing a receiver that bristled with the latest features, had a good battery life, and yet took up half the size of its rivals. The DJ -X1 is the culmination of an extensive design programme from one of the most dynamic manufacturers of communications equipment in Japan today. It has an unbelievably low current drain of just 24mA on battery save and using 6 AA cells this will give extensive monitoring time. And even if you accidentally leave the receiver switched on, it will turn itself off after a pre-programmed time, thus further preservinc battery power. Comprehensive scanning facilities include 3 speeds, and 100 e memories are provided for flexible storage of scanned channels. a,I. 411 For further information on this amazing receiver contact us today or visit your local approved dealer who will be pleased to help. Available from all good 1. 1 v dealers. £269 ALINCO (UK) Ltd. 22 Main Road, Hockley, Essex. SS5 4QS Tel: 0702 206835

2. It's only during the past few addition, because of the small years, that the use of scan- size, the user often has to ning receivers has become operate several controls in really popular in this country. sequence in order to select Short wave listening has particular functions. However, always been popular, both of these drawbacks are permitting you to listen to usually offset by the conven- signals from different corners What is ience of being able to carry of the globe in the comfort of the receiver to particular your own home. In contrast, a events or locations. scanning receiver only allows In the UK it is particularly you to monitor relatively local important to choose a model signals, but these are often of scanning receiver that is just as interesting and can a suited to the types of transmis- range from amateur, mari- sion likely to be heard. time and aircraft transmis- Several models currently sions to satellite and space available were originally communications. designed for the American This recent upsurge in market and may not be interest is partially due to the Scanner entirely suitable for use in this increase in public awareness or other European countries. of personal communications The main points to look out for devices such as Cellular and are the frequency coverage - Cordless telephones and Alan Gardner which in modem designs partially due to the availabil- tends to be continuous from ity of scanning receivers. 25-550MHz, any additional Although scanners have been ranges should be treated as a around for more than ten aircraft communications. Scanning receivers tend to bonus. The tuning step size years, it is only with the All of this is fine if you fall into one of three catego- which should include 25, 12.5 advent of microprocessor know what frequencies are ries - Rrtse station, Mobile and and 5kHz steps, and be control circuits and surface being used - if you don't you Hand-held. The latter being manually selectable, and mounted components that the will need to use the 'SEARCH' the most popular amongst finally what is perhaps the cost and performance of such mode. This is the other main users at the moment. Ruse most important item, ensure receivers has made v.h.f. / method of operation offered station models tend to be that both a.m and n.b.f.m. u.h.f. listening possible for on most models of scanning fairly large and have a built- modes are available and are people other than professional receiver. In this mode, the in mains supply. They have manually selectable. Addi- users or dedicated hobbyists. receiver automatically the advantage of being easy tionally w.b.f.m. may be searches for signals within to operate because the found on some models. This is What Can a Scanner Do? pre -determined frequency controls are reasonably sized useful if you wish to listen to limits set by the user. As in the and they normally have a TV and radio broadcasts Most scanning receivers have scan mode, the search stops better performance than the including East European two main modes of operation. when a signal is found. The other types. This is important stations in the 60-80MHz The first of these is usually frequency can then be when an external antenna is band. referred to as the 'SCAN' transferred to a memory used or if you live in a city mode and is where this type channel from which it can be where a lot of strong signals of receiver gets its name from. instantly recalled at the touch are likely to be present. Where Can I In the Scan mode frequencies of a button. Some receivers Models designed for Find Out More? of interest need to be pre- can do this automatically so mobile use tend to be more programmed into a number all you need to do is set up a compact than their brine Right here of course - Short of 'MEMORY' channels. When search band and then let the station counterparts as they Wave Magazine has a Scan is selected the receiver scanner do all the hard work operate from an external 12V regular column devoted to sequentially tunes to each for you. d.c. supply and so do not Scanning in which readers memory channel until a Most modem designs of have to incorporate a bulky questions are answered. signal is found. The scan then scanning receiver have mains transformer. They Other columns in the maga- stops until the transmission several hundred memory generally have a reasonable zine feature items of interest to ends or a predetermined channels which are often performance and often work scanning enthusiasts and period of time has elapsed, at divided into banks of 10 or as well as as dedicated base new products are frequently which point the scan contin- more. These can then be stations. reviewed. A good general ues until another signal is selected individually or as a Hand-held scanners are guide to the hobby which I found. By scanning memory bank for inclusion in a scan. designed just for that purpose. can thoroughly recommend is channels it is possible to The ability to temporarily They have to be small, light- Peter Rousé s book Scanners, automatically monitor a large remove a memory channel weight and contain their own which is available from the number of different frequen- from a scan is usually referred batteries. In order to be able S WM Book Service. Once you cies without having to to as a 'LOCKOUT function to meet these requirements, own a scanner and want to constantly operate a tuning and on some models is also they may have to compro- know where to find particular knob. This makes it particu- available in the search mode mise on performance which transmissions you can try The larly uceful when frequencies in order to prevent the may be disappointing when Complete VHF/UHFFre- are known but the transmis- receiver stopping on specific used with anything other quency Guide which is also sions are brief - such as with frequencies. than the supplied antenna. In available from S WM. Cover credit. AOR (UK) Ltd. kindly loaned the range of scanners featured on our front cover.

WHAT SCANNER, AUTUMN 1991 - PAGE 3 Marine Band Frequencies onthe Fair mate HP 100E The very flexibility and choice really confident in the of programmable functions The Fairmate HP 100E, along with the programming and the effect on this type of scanner can of programming in SCN lead to some difficulties until practically identical AOR, are extremely mode. you have learnt how to 'fly' popular. The wide frequency range To place a frequency in them. Many new purchasers available, ease of carrying and the the memory of the SCAN are disappointed with the mode first press MANUAL, the performance initially, but this flexible power requirements make them frequency already shown can usually be put down to probably the most versatile scanners on inthe window will disappear the lack of understanding of and the small MHz sign will how to program the memory the market today. T. A. James explains start to flash. Enter the scans. The scanners are how they can be programmed for the frequency, not forgetting the usually delivered with a some Marine Band frequencies. decimal point. Then press ENT pre-set frequency limits in (enter). Next press PROG, the each bank in the SEARCH exisitng Bank Number will MODE, which can be disappear. Enter the Bank changed if you wish and bank it happens to be in at putting the frequency for Number you wish it to be some frequencies that time. It does this logically Glasgow Airport in the scan if placed in and that is it. programmed into each bank i.e. one after the other in you were listening in Put simply, it is MANUAL - of the SCAN MODE. Whilst the numerical order. It can be Cornwall - you could not hear Enter frequency - ENT - PROG frequencies already inthe made to search any single it and it would take up scan - Enter Bank Number. SEARCH MODE memory bank or number of banks if time. One world of warning. If banks are relevant and you wish, but if you do not In SCAN MODE the you forget to press PROG or contain many potentially LIMIT this search, it will go scanner has a scan rate of forget to enter a new bank interesting frequencies, the through all the search banks some 20 channels per second, number it will put the new SCAN MODE memory banks and start again at zero. The so it follows that it takes some frequency into the bank are pre -loaded with problem with SEARCH MODE 5 seconds to scan a bank with number that was in the frequencies that, the author is, because it is such a wide 100 frequencies in its memory window when you started, suspects, are only put in to search, it misses many - more than long enough to thus possibly messing up a initially test the machine and transmissions due to either pick up any transmission. nice tidy scan in another do not have much relevance having gone past the bank. There is nothing more to the individual i rsPr. frequency of the a Frequency Lists annoying than picking up transmission already or it has Jimmy Young in the middle Bewilderment not got there yet. The It is, of course, necessary to of an airband scan. The scan narrower the search the more know the frequency before will stop at that point It would be as well at this chance of picking up a you can place it into the because, unlike airline pilots, stage to go through the transmission. memory of the SCAN mode . his transmissions do not stop. meaning and difference of This is where SCAN MODE Excellent frequency lists are Always try to place your these two modes as this can comes in. By programming a offered by many advertisers chosen frequencies in the lead to the original, and number of known frequencies in this magazine. Some SCAN in a tidy logical temporary, bewilderment. into each scan bank we can interesting frequencies may manner. As you already In SEARCH MODE the improve our chances of be picked up during know you have 10 banks of scanner moves through all picking up a transmission operation in the SEARCH 100 frequencies that you can the search banks in because, presumably, we mode. Make a note of these place in memory. It is possibly numerical order seeking and have only put the frequencies for inclusion in the memory of easier to follow the transmission within the pre-set in that we we expect to hear your SCAN mode. Do not try manufacturers guidelines in upper and lower limits of the where at our location. It to enter them directly from the SEARCH mode and put frequencies of the search would be a waste of time SEARCH mode until you are the civil airband SCAN into WHAT SCANNER, AUTUMN 1991 - PAGE 4 Bank 1, (Bank Nos 100-199), channel, to be interrogated military cárband SCAN into automatically every 2 Bank 2 (Bank Nos 200-299), seconds. Channel 16 is the Marine band scan into Bank initial calling channel, the 6 (Bank Nos 600-699), etc. distress channel and the urgent channel. It is from here Potentially Difficult that the initial call takes places with both parties One of the most potentially agreeing a channel to move difficult blocks of frequencies to. It is useful to make the to SCAN is the marine band. memory number that holds This is because firstly they Channel 16 the AUX channel. converse with each other This means you will hear using channel numbers rather everyone that calls. You can than frequencies. The reason then decide whether to follow for this is that it is easier for a them or keep scanning. mariner to remember a Table 1 is a suggested channel number than a six - way to lay out your scan. In digit frequency. The second this case the scan in placed in difficulty is caused by the fact half could be anywhere in up the reply, turn it two clicks Bank 6, so all the numbers that some, but not all, the memory. You may not in the opposite direction to go start with a 6. If you put the transmissions are in what is even get there by being past where you picked up the scan into bank 9, all the termed DUPLEX. This means blocked by another original signal and back one numbers would start with a 9, that, even though both ship transmission from another frequency. This, of course, will of course. and shore are talking to each source. The first rule is always be easier if you utiiisa the You will find that in many other on the same channel, program the two frequencies HOLD facility from the start sea areas a lot of the the ship is transmitting on one of a duplex channel where it will lock onto the channels are unused. In that frequency and the shore is alongside each other. WE can original frequency and stay case use the CLEAR facility to transmitting on another. then, by utilising the very there. wipe them out of memory These two frequencies are as clevel UP/DOWN tuning knob rather than the LOCKOUT far apart as possible. This is for onthe top of the scanner, AUX Facility facility. The LOCKOUT facility technical reasons which are switch between the two still scans that frequency but outside the scope of this frequencies that make up the Another facility that is very it does not show up. We article. channel. This frequency will useful for marine band should be aiming at the If we were to program the only be one click of this knob listening on these scanners is shortest possible scan frequencies into our SCAN for in either direction. If you click the AUX facility. This feature consistent with the number of the marine band in a it one way and do not pick allows any one, preset frequencies we wish to scan. haphazard way, we could pick up a transmission say Table 1 from a ship to the shore and, presuming we are inthe Bank 6 DELAY mode, after the ship has finished speaking and the Bank No Freq delay has run out, the set will 600 156.00 Coastguard/lifeboat start scanning again. now, 601 156.03 Ch 60 ship we wish to listen to the other 602 160.63 Ch 60 shore half of the conversation but 603 156.05 ch 1 ship the frequency carrying this WHAT SCANNER, AUTUMN 1991 - PAGE 5 5 The rules are simple - all you have to do is write down what feature or features you would like to see incorporated in the next generation of scanning receivers. It could be a particular method of Win operation, a new style case design or a revised front panel layout. Anything that you think would be an an improvement or would like to see. The most practical and innovative ideas will be AOR selected by The Editor together with 'Scanning' columnist Alan Gardner and a winner chosen. 2000 Although only one person will receive the prize everyone entering should benefit as we will be passing on your best ideas to AOR, many of which Free to enter competition could be incorporated into future designs. You can either describe or sketch your ideas but they must only be on one side of an A4 sheet of paper with your name and address clearly printed on the opposite side. Try and be concise with your description and make sure that you clearly state the most important features.

We are expecting a large number of entries for this competition so it is important that you follow these Twenty years ago you would instructions in order to avoid your entry being have needed a rack full of AOR LISTEN TO YOU equipment in order to be able consigned to the waste paper bin. to monitor v.h.f./u.h.f. AOR have been responsible transmissions. Ten years ago, for many of the major crystal controlled equipment innovations in scanning Once you have completed your entry send it to: was just becoming available receiver design over the past AR2000 Competition, PW Publishing Ltd., Enefco which would allow you to ten years and they would like scan up to ten frequencies to hear your ideas for future House, The Quay, Poole, Dorset BH15 1PP. The within a small band. Seven generations of scanners. In winner will be announced in a future edition of years ago the first order to add a little bit of an S WM. The closing date for all entries is 31 December synthesised scanning incentive, they are giving one receivers offering continuous of their latest models, an 1991. frequency ranges and tens of AR2000 hand-held receiver as memory channels were just a prize for the best new idea. becoming available. Three Unlike normal competitions Unfortunately, the competition is not open to years ago the first continuous we are not just giving this employees of PW Publishing Ltd, its authors or coverage hand-held scanners superb prize away - you will with hundreds of memory have to work for it! You don't advertisers in Short Wave Magazine. Each entry channels were starting to have to answer any questions must be accompanied by the appropriate 'flash' appear. The past two years or write a winning slogan but have seen the introduction of you will have to do some from the bottom of this page. The Editor's decision is scanners with thousands of serious thinking in what we final and no correspondence will be entered into. memory channels, believe is the first competition continuous frequency of its type in this magazine. coverage from below 1MHz to over 1GHz, single sideband reception, multiple scanning modes and computer control. Whatever can we expect next? you may ask. Well that could depend on you. WHAT SCANNER COMPETITION Another First Alnco have introduced their first scanning receiver and it is hoped that the first shipments will be made at the end of October or early November. Designated the DJ -X1, it comprises a very compact 1MM design measuring only 110 x 53 x 30mm, thus making it one of the smallest models available. Frequency coverage is from 500kHz to 1300MHz without gaps. It has the widest number of Dual Airband Scanner programmable steps ever to be made available: 5/9/10/ Nevada have announced the 12.5/20/25/30/50 and world's first dual airband receivers. 100kHz. Modes include a.m., scanning receiver, covering The HP1000AB will sell at n.b.f.m. and w.b.f.m. and both civil and military £229 (including VAT) sensitivity is claimed to be airbands. including charger, carrying unsurpassed. The set has 1000 memory case, earphone and NiCad The price has not yet been channels in ten search banks Batteries. announced, but it promises to that can be scanned at over The first shipment is due to be highly competitive! For 20 channels per second. arrive in early November. those needing further details, As a dedicated airband More details can be obtained contact Waters & Stanton radio, the HP1000AB has been from Nevada Electronics, 22 Main Road, designed to give outstanding Communications, 189 London Hockley, Essex SS5 4615. Tel: performance in the civil/ Road, North End, Portsmouth, (0702) 206835. FAX: (0702) military airbands compared Hants PO2 9AE. Tel: (0705) 205843 to other wide -band scanning 662145. FAX: (0705) ó90626

Scanning in Japan New Sony Centre Most major scanning receiver manufacturers in Japan will, in future, delete the cordless and cellular frequencies used in Bredhurst Electronics Ltd of Handcross, West Susx have Japan from their products for the Japanese domestic market. been appointed as a Sony Communications Centre. They This will also apply to amateur radio transceivers that include will be stocking the complete range of Sony World Band these frequencies as an extra receiving feature. Receivers and accessories to compliment their existing The recently introduced Icom R-7100 is the first receiver to selection of radio products from all major manufacturers. comply with this request on the Japanese domestic market, and Bredhurst Electronics Ltd, High Street, Handcross, has all frequencies in cellular and cordless use deleted. West Sussex RH17 6BW. Tel: (0444) 400786. FAX: (0444) Thanks to SSE for this information. 400604.

In Stock Scanmaster Scanner Controllers Link Electronics of 12.5kHz steps. This hand-held memorising a frequency Peterborough have informed scanner comes complete with during scan, frequency me that they now have NiCads and charger or it can search that allows scanning available, in stock, the latest be powered from a 12V between two frequencies and Peter Longhurst of Garex offerings from Realistic. external power source. It two -speed scan and search. Electronics has informed us The Patrolman PRO -41 is a features both channel This is a new entry into the that he had taken over the 10channel scanner covering lockout, priority channel mid -range hand-held scanner manufacture of the 66-88 and 137-174MHz in 5 facilities as well as 10channel market and has been Scanmaster scanner and 12.5kHz steps. This hand- storage banks. It also has a designed for the airband, controllers from David held scanner requires five AA monitor memory for p.m.r. or amateur enthusiast. Husband of EMP Ltd. This NiCads or Alkaline batteries The PRO -37 has yet to be will allow David to do what or a 12V external power released. However, this will he does best - programming source. It comes complete be a 200 -channel hand-held and designing. with antenna and belt clip scanner with Hyper -Scan to If you would like details and can accept an external cover the top end of the of the Scanmaster, then speaker or earpiece. It hand-held market. Details will contact: replaces the PRO -38 and can follow so keep an eye on the be bought for £99.95. S WMnews pages. Garex Electronics, The Patrolman PRO -35 is a Link Electronics, 228 Station Yard, South Brent, 100channel scanner Lincoln Road, Peterborough South Devon T6110 9AL. Tel: covering 66-88MHz in 5kHz PEI 2NE. Tel: (0733) 345731. (0364) 72770. FAX: (0364) steps and 108-136.975MHz in FAX: (0733) 346770. 72007 WHAT SCANNER,AUTUMN 1991 - PAGE 7 T r L i

Fairmate HP200 AOR AR2000

TYPE. portable SCAN RATE up to 20 channels per second 11I TYPE: hand-held COVERAGE: 500kHz-t 300MHz SEARCH RATE: up to 40 steps per second COVERAGE 500kHz-1300MHz MODES: a.m., n.b.f.m., w.b.f.m. MEMORIES. 1000 in 10 x 100 channels MODES. a.m.. f.m., w b.f.m. SENSITIVITY: n.b.f.m. approx 0.50.1© 12dB FEATURES: supplied with single wide -band SENSITIVITY: below 2MHz less than 10µV for 20dB, 15-500 & 800- SINAD across most of range; a.m. approx 3µV 40 whip antenna, a.c. charger, NiCads, 12V d.c. 1300MHz less than 0.5µV for 12dB SINAD f.m_ 15-600MHz less than 2µV 10áB S/N across most of range lead fitted with cigar lighter plug, soft case for 20dB a.m. 60% modulation, 15-600MHz less than 31.1V for 30dB S/N RESOLUTION 5/12.5kHz with carry strap and belt hook. w.b.f.m. IMAGE REJECTION: REVIEWED: RESOLUTION. 5-995kHz selectable IF STAGE: PRICE: £259 IMAGE REJECTION AUDIO OUTPUT: >100mW 40 10% distortion IF STAGE AUDIO OUTPUT ' cre than 100mW for 10%t.h.d. SCAN RATE C channels per second SEARCH RATE ass than 40 channels per second Yupiteru MVT-7000 MEMORIES 1000 in 10 x 100 channels FEATURES: NiCads, carry case, shoulder strap. belt clip. d c cable, earpiece, three antennas and charger REVIEWED TYPE hand-held PRICE. £269 COVERAGE 8-1300MHz MODES: a.m., n.b.f.m., w.b.f.m. SENSITIVITY: n.b.f.m. >0.5µV for 12dB SINAD, w.b.f.m. 0.75µV for 12dN SINAD, a.m. 0.5µV for 10dB S/N RESOLUTION 5/10/12.5/25/50/100kHz IMAGE REJECTION. IFSTAGE. AUDIO OUTPUT: 120mW into 8S2 SCAN RATE. 16 channels per second SEARCH RATE 20 steps per second Yupiteru MVT-6000 MEMORIES 200 FEATURES. variable display contrast, ten user -defined search patterns TYPE: base/ mobile AUDIO OUTPUT REVIEWED: August 1991 Short Wave Magazine COVERAGE: 25-550 & 800-1300MHz SCAN RATE PRICE: £289 MODES: a.m., f.m. SEARCH RATE 8 or 20 steps per second SENSITIVITY: 25-550MHz f. m. 0.5µV 12dB SINAD, MEMORIES: 100 in 5 o 20 channels 800-1300MHz f.m. 0.8µV 12dB SINAI. a.m. 0.710V FEATURES. selective bank scanning. NiCads. 10dN S/N telescopic whip, carry case & strap, belt clip RESOLUTION: 5/10/12.5/25 or 30kHz REVIEWED IMAGE REJECTION. PRICE. £299 Yupiteru VT-125UK IF STAGE TYPE: airband hand-held COVERAGE 108-142MHz MODES. a.m. SENSITIVITY. >0.50/ RESOLUTION 25/50kHz IMAGE REJECTION: IF STAGE AUDIO OUTPUT: 60mW into 003 SCAN RATE 20 channels per second SEARCH RATE: MEMORIES 30 FEATURES I.c.d. signals meter, I.c.d. backlight REVIEWED: PRICE. £179 AOR AR2800 Yupiteru MVT-5000

TYPE: base/mobile TYPE' hand-held COVERAGE: 500kHz-600MHz & 800-1300MHz COVERAGE: 25-550 & 800-1300MHz MODES: a.m., n.b.f.m., w.b.f.m., u.s.b., I.s.b., c.w, MODES' a.m., f.m. SENSITIVITY: n.b.f.m. approx 0.5µV ld? 12dB SINAD, SENSITIVITY. 25-550MHz f.m. 0.54V 12dB SINAD, a.m. approx 31.tV 40 10dB S/N across most of range 800-1300MHz f.m. 0.81V 12dB SINAD, a.m. 1.51IV RESOLUTION: 5kHz 10dN S/N IMAGE REJECTION: RESOLUTION 5,110.'12.5/25 or 30kHz IF STAGE. IMAGE REJECTION AUDIO OUTPUT: IF STAGE Fairmate HP-1000AB Shinwa SR001 SCAN RATE: up to 20 channels per second AUDIO OUTPUT. SEARCH RATE: up to 20 steps per second SCAN RATE TYPE. hand-held TYPE case/mobile MEMORIES. 1000 in 10 x 100 channels SEARCH RATE. 8 or 20 steps per second COVERAGE: 108-143, 220-400MHz COVERAGE: 25-999.995MHz FEATURES: supplied with a.c. power supply, whip MEMORIES: 100 in 5 o 20 channels MODES a.m., f.m. MODES: a.m., w.b.f.m., n.b.f.m. antenna, d.c. lead, mobile mount, manual and fitted FEATURES: selective bank scanning, NiCads, SENSITIVITY: a.m. better than 0.25µV for 10dB SENSITIVITY -4dBIN or lower (12dB SINAD) with internal NiCad battery pack e.escopic whip, carry case & strap. belt clip S+N/N, f.m. better than 0.25µV for 12dB SINAD RESOLUTION 5/10/12.5/20/25/50/100kHz REVIEWED: REVIEWED' RESOLUTION: 5-995kHz in multiples of 5 or IMAGE REJECTION: 46.548 PRICE: £395 PRICE: £229 12 5kHz IF STAGE ülRrrñ- IMAGE REJECTION: better than -7546 AUDIO OUTPUT: 2W into 401 IF STAGE SCAN RATE: over 20 channels per second AUDIO OUTPUT- 100mW for 10% or less t.h.d. SEARCH RATE (via.) 35 channels per second Nevada MS 1000 SCAN RATE over 20 channels per second MEMORIES: 200 in 20 x 10 channels SEARCH RATE: FEATURESRS-232C port, wireless remote controller, TYPE mobile/base MEMORIES. 1000 up to three option units can be incorporated including COVERAGE 500kHz-600MHz & 800-1300MHz FEATURES the external ROM MODES: a m ,n.b.f.m., w.b.f.m. REVIEWED REVIEWED: SENSITIVITY: a.m. 500kHz-2MHz - 1010V 20dB; a.m. PRICE. £229 PRICE: £299 0.7-111V Cz910dB S/N; f.m. 0.511V ®12dB SINAD, w.b.fm. 11R ® 20dB S/N, high band f.m. 0.7-1µV 12dB SINAD RESOLUTION: 5/12.5kHz IMAGE REJECTION. Realistic PRO -2006 IF STAGE AUDIO OUTPUT. 500mW or more TYPE: base/mobile AUDIO OUTPUT: 1.3W nominal SCAN RATE: 20 channels per second COVERAGE: 25-520 & 760-1300MHz SCAN RATE. 26 or 13 channels per second SEARCH RATE: 20 steps per second MODES. a.m., w.b.f.m., n.b.f.m. SEARCH RATE: MEMORIES: 1000 in 10 x 100 channels SENSITIVITY: w.b.f.m. 31.11/ for 25-520 & 760- MEMORIES 400 in 10 x 40 channels FEATURES: user selectable search steps from 5- 1100MHz, 10µV for 1100-1300MHz; n.b.f.m.3µV: a.m FEATURES 995kHz, selectable 10dB attenuator, keypad or rotary 21.6/ 25-520 & 760-110MHz, 51.0V for 1100-1300MHz REVIEWED: February S1991 Short Wave control, all metal case. RESOLUTION: 5/ 12.5/50kHz Magazine REVIEWED: May 1991 Short Wave Magazine IMAGE REJECTION: 60dB PRICE £330 PRICE £279 IF STAGE

WHAT SCANNER, AUTUMN 1991 - PAGE 8 J Realistic PRO -38 Uniden Bearcat 70XLT

TYPE: hand-held COVERAGE: 68-:át,136-174, 406-512MHz TYPE: hand-held MODES f.m COVERAGE. 29-54. 135-174, 406-512MHz SENSITIVITY: 68-88MHz= 0.5µ1/ normal, 21W limit; MODES: f.m., a.m. 136-t 74MHz=0.7µV normal, 3µV limit; 406-512MHz SENSITIVITY 29-54MHz = 0.4µV, 136-174MHz = 0.7 normal, 40/ limit SpV, 406-512MHz = 0.7µV SELECTIVITY. At 155MHz -646 =±10kHz, -50dB = SELECTIVITY. -55dB ©±25kHz ±17kHz RESOLUTION 5kHz RESOLUTION IMAGE REJECTION. -50dB IMAGE REJECTION IF STAGE 10.8MHz IF STAGE AOR AR2001 AUDIO OUTPUT: 140mW at 10% t.h.d. into 812 ALIDIO OUTPUT: nominal 260mW SCAN RATE. 15 channels per second SEARCH RATE 15 channels per second SCAN RATE 10 channels per second IF STAGE -30MHz. 455kHz TYPE. base station MEMORIES: 20 SEARCH RATE: AUDIO OUTPUT. 1W © 10% t.h.d. COVERAGE 25-550MHz FEATURES: MEMORIES' 10 SCAN RATE 5 channel per second MODES a.m.. n.b.f.m.. w.b.f.m. REVIEWED: FEATURES: Keyboard lock switch. l.c.d. channel SEARCH RATE 6 seconds per MHz SENSITIVITY: n.b.f.m. = 0.39µV ®12dB SINAD PRICE: £200' readout, jack for earphone, belt clip and flexible W 70MHz MEMORIES 20 antenna supplied. SELECTIVITY. n.b.f m =±13kHz ©6d8. ±2l kHz FEATURES REVIEWED: Short Wave Magazine October 1988 70dB. w.b.f.m =±180kHz a 6dB, ±446kHz e REVIEWED Practical Wireless May 1984 10 1.65 back issue) 70dB, a.m. = 13.5kHz a 6dB 1£1 65 cacK ssue) PRICE: E80 RESOLUTION: 5.12 5, 25kHz PRICE: Available second-hand IMAGE REJECTION -50dB Realistic PRO -2004

TYPE: base/mobile station COVERAGE: 25-520. 760-1300MHz MODES am, w.b.f.m., n.b.f.m. SENSITIVITY: w.b.f.m. 25-520 & 760-110MHz = 30/, 1100-1300MHz = Uniden Revco RS -2000E TOUV all ®30d8 S/N a22.5kHz;n.b.f.m.25-520MHz=05µV 760-1300MHz = 6 3µV all at 2040 S/N ® 3kHz dev; a.m. 25-520 & 760-1100MHz = 2pV, Bearcat 50XL TYPE "ase station 1100-1300MHz = 3µ3/ all at 20dB sin ®60% AOR AR -2002 COVERAGE 60-179. 380-520M Hz SELECTIVITY: n.b.f.m. & a.m. ±9kHz ® -6dB, ±15kHz 80 -50dB, w.b.f.m. MODES an., f.m. 50kHz © -6dB, ±300kHz 80 -5008 TYPE. hand-held TYPE: base/mobile station SENSITIVITY. vhf f m = 0 5µV. uh f RESOLUTION 5, 12.5 or 50kHz COVERAGE. 29-54,136-174, 406- COVERAGE: 25-550, 800-1300MHz =10µ4 IMAGE REJECTION: -60áe 512MHz MODES: a.m., n.b.f.m., w.b.f.m. SELECTIVITY 60dB ©±25kHz IF STAGE 611 5-607.505MHz, 48.5MHz, 455kHz (a.m.) MODES: a.m., f.m. SENSITIVITY: n.b.f.m. = 0.3111/, w.b.f.m. =1.0µV both @ 12dB SINAD; a.m. RESOLUTION 5kHz AUDIO OUTPUT: 1.8W ®3% t.h.d. SENSITIVITY-29.54MHz=0 4µV, = 0.51.61 C0 10dB S/N IMAGE REJECTION: SCAN RATE: 8 or 16 steps per second "36-174MHz=0.50/, 406-512MHz SELECTIVITY' n.b.f.m. ±7.5kHz CD 6d8, w.b.f.m. ±250kHz © 6048. a.m. = IF STAGE SEARCH RATE B or 16 steps per second 0 7µV for 12dB SINAD ±10kHz ® 7046 AUDIO OUTPUT. 2W MEMORIES: 300 SELECTIVITY -55dB ±25kHz RESOLUTION: 5, 12.5, 25kHz SCAN RATE 5 or 10 channels per sec FEATURES: Lock -out key, squelch, priority function key and large I.c.d. read- RESOLUTION 5kHz IMAGE REJECTION: -50dB IMAGE REJECTION -50dB IF STAGE 750, 45.03MHz (w.b.f.m.), 455kHz In.b.f.m./a.m.) SEARCH RATE 5 or 10 channels per REVIEWED- Short Wave Magazine April 1987 )01.65 back issue) IF STAGE 10.8MHz AUDIO OUTPUT: 1W a <10% distortion PRICE: £330' AUDIO OUTPUT. 500mW at 10% SCAN RATE: 5 channels per second MEMORIES: 70 tir o m 812 SEARCH RATE: 6 seconds per MHz FEATURES' Autio search and store SCAN RATE. 15 channels per MEMORIES: 20 REVIEWED. second FEATURES. Tuning knob plus keypad, mal -time clock- computer control PRICE: £779' Uniden Bearcat UBC-175XL SEARCH RATE 15 channels per factlnies second REVIEWED: Practical Wireless December 1985(85p photocopy) PRICE: E487 MEMORIES. 10 TYPE. base station FEATURES COVERAGE 66-88,118-174, 406-512MHz REVIEWED MODES a.m_ f.m. PRICE: £99 SENSITIVITY: 29-54 & 136-174MHz = 0.3µV. 406-512MHz = 0.5µV, 118- 136MHz = 0 BpV 80 12dB SINAD SELECTIVITY -45áR 80±25kHz RESOLUTION 5kHz IMAGE REJECTION -55d13 JIL SX-200N IF STAGE - ] B5MHz, 450kHz AUDIO OUTPUT. 800mW © 10% t.h.d. SCAN RATE 5 or 15 channels per second TYPE. mobile/base station IF STAGE 10 7MHz, 455kHz SEARCH RATE 5 or 15 channels per second COVERAGE 26-88, 108-180, 380-514MHz AUDIO OUTPUT 2W MEMORIES 16 MODES: a.m., n.b.f.m. SCAN RATE 4 or 8 channels per second FEATURES. priority scan, channel lockout, auto squelch, short term memory SENSITIVITY: f.m. = > 60dB a 25kHz, a.m. = >60dB at±10kHz SEARCH RATE 5 or 10 channels per second back-up, wood veneer case SELECTIVITY: 26-180MHz f.m. = 0.41IV, 380-514MHz =1.0µV both at MEMORIES 16 REVIEWED: Short Wave Magazine December 1987 101.65 back issue) 12dB s/n, 26-180MHz a m. =1.0µV at 10dB s/n, 380-514MHz a.m. = 2.0pV FEATURES PRICE: £170 RESOLUTION 5.12.5kHz REVIEWED Practical Wireless October 1981 If1.65 back issue) IMAGE REJECTION PRICE: E325'

Yaesu FRG -9600 AOR AR2500

TYPE base/mobile RESOLUTION 5kHz MEMORIES: 1984 as 62 x 32 channels TYPE: base station COVERAGE 5-550MHz & 800-1300MHz IMAGE REJECTION: FEATURES: 16 search banks, RS232 socket for COVERAGE 60-905MHz (up to 460MHz for s.s.b.) MODES a.m., n.b.f.m., w.b.f.m., u s.b., I.s.b, c.w IF STAGE computer control, supplied with a.c. power supply, MODES: n.b.f.m., w.b.f.m., n.b.a.m., w.b.a.m., s s.b. SENSITIVITY n.b.f.m. approx 0.45µV ® 12dB AUDIO OUTPUT 500mW in 812 (11110% t.h.d. SENSITIVITY: n.b.f.m. = 0.5µV, w.b.f.m. = 1.0pV both ® 12dB SINAD, whip antenna, d.c. lead, mobile mount and manual SINAD,w.b.f.m. approx 1µV t0 12dB SINAD, a.m. SCAN RATE up to 36 channels per second REVIEWED n.b a m. =1.0µV, w.b.a.m. =1.5µV both 4410dB S+N/N, s.s.b. =1.OµV @ 15dB approx 1µV Czp 10dB S/N across most of range SEARCH RATE up to 36 steps per second PRICE £419 S+N/N SELECTIVITY: n.b.f.m.±15kHz, w.b.f.m.±180kHz, n. b.a.m.±2.4kHz, w.b.a.m. ±6kHz, s s.b. ±2 4kHz all 40 3dB RESOLUTION: 100Hz, 1, 5, 10, 125, 25 or 100kHz depending on mode JIL SX-400 Uniden Bearcat 100XL IMAGE REJECTION. 60-460MHz = -50dB, 460-905MHz = -40dB IF STAGE 45.754, 10 5MHz & 455kHz TYPE: base station AUDIO OUTPUT: 1W into 812 with less than 10% t.h.d. COVERAGE: 26-520MHz 1100kHz-1.4GHz with converters) SCAN RATE 0ot given TYPE hand-held MODES. a.m., n.b.f.m., w.b.f.m. SEARCHRATE. COVERAGE. 66-88, 118-174, 406-512MHz SENSITIVITY: v. h f. f.m. = 0.5µV v.h 1. f.m. = 0.50V both 01240 S/N; v.51. MEMORIES "00 MODES. a.m., f. m. a.m. =1.0µV, u.h.f. a.m. = 2.0µV both ®10dB S/N FEATURES - 66n whip antenna, 1.8m d.c. power cable, mobile mounting SENSITIVITY. 30-50MHz = 0.3µV, 118-136MHz = 0.8µV, 136-174MHz = SELECTIVITY-- f m. = 60dó ®±15kHz, a.m. = 60dó ®±10kHz both with S/ nracKet & were stand. 0.4µV, 406-512MHz = 0.5µV for 12dB SINAD N 45dB REVIEWED: SELECTIVITY: 50dB at ±25kHz RESOLUTION. 5, 125, 10, 12.5kHz RESOLUTION. 5kHz PRICE: E500 IMAGE REJECTION: vhf. = 5040 IMAGE REJECTION: -50dB IF STAGE "0 7MHz, 455kHz IF STAGE 10.8MHz AUDIO OUTPUT. 2W into 412 load AUDIO OUTPUT 300mW at 10% Old. SCAN RATE. 4 or 8 channels per second SCAN RATE '5 channels per second Realistic PRO -32A SEARCH RATE. 5 and 10 channels per second SEARCH RATE. 25 frequencies per second MEMORIES 20 MEMORIES. 16 FEATURES TYPE hand-held FEATURES. Priority channel, keyboard lock, auto squelch, battery low REVIEWED COVERAGE: 68-88, 108-136la.m.),138-174, 380-512MHz indicator, back -lit display PRICE: f650' MODES: a.m., f.m. REVIEWED. SENSITIVITY: 6B-88MHz=0.6µV,138-t74MHz &380-5t2MHz=1.0µVf.m. PRICE: £190' 20dB S/N at 3kHz deviation; 108-136MHz = 20/ a.m. 2046 S/N at 60% modulation SELECTIVITY: -6dB 40 i9kHz, -60d8 40±15MHz RESOLUTION. 5, 12.5 or 25kHz IMAGE REJECTION: "Z Regency HX850E IF STAGE 5kHz, 10.7MHz AUDIO OUTPUT 300mW TYPE: hand-held RESOLUTION. 5, 10 & 12.5kHz 9 seconds per MHz SCAN RATE 4 or 8 channels per second COVERAGE: 75-106 or 60-90, 118-175, 406-496MHz IMAGE REJECTION: MEMORIES: 20 SEARCH RATE: 4 or 8 channels per second MODES: a.m., n.b.f.m. IF STAGE 21 4MHz, 455kHz FEATURES: Ni(ads, flexible antennas and MEMORIES: 200 SENSITIVITY: v.h.f. f.m = 0.7µV 011. f.m. = 1.0µV AUDIO OUTPUT: 10mW ®10% or less t.h.d. 240V charger supplied. FEATURES. lockout, delay and priority channel, helical antenna. both 8012dB SINAD. v.h.f. a.m. =1.011 CS 10d8 s/n SCAN RATE' 12 channels per second REVIEWED: REVIEWED: Short Wave Magazine November 1987 (£1.65 back issue) SELECTIVITY: f.m./a.m.±7.5kHzCl 6d8 SEARCH RATE: u.hf.=7 seconds per MHz; v.h.f.= PRICE: £280' PRICE £240'

WHAT SCANNER, AUTUMN 1991 - PAGE 9 Realistic PRO -2021

TYPE base/mobile COVERAGE 68-::, 108-136, 138-174 380-512MHz MODES a m., f.m SENSITIVITY 66-88MHz, 138-174MHz & 380-512MHz =11,V, 108-136MHz = 20/ SELECTIVITY. -6dB ® 3kHz, -50d8 e ± 15kHz Uniden Bearcat 100XLT RESOLUTION. 5, 12.5 & 25kHz IMAGE REJECTION - TYPE' hand-held 1. IF STAGE 10 7MHz, 455kHz J\/Lsf,l_l COVERAGE' 29-54,118-174.406-512MHz AUDIO OUTPUT 300mW MODES a.m., f.m. SCAN RATE 4 or 8 channels per second SENSITIVITY' h.f =0.4µV, v h f. =0.8µV, u.h.f. =0.5µV SEARCH RATE. SELECTIVITY ±25kHz5055dB Black Jaguar BJ200 Mark III MEMORIES 200 RESOLUTION 5, 10, 12.5kHz FEATURES Squelch control, mobile mounting bracket included, sockets for external IMAGE REJECTION: antenna. speaker and tape socket TYPE: hand-held IF STAGE REVIEWED Short Wave Magazine August 1988 (85p photocopy) AUDIO OUTPUT. 480mW COVERAGE. 26-30, 50-::,115-178, 210-280, 360-520MHz PRICE £220' MODES. a.m., f.m. SCAN RATE: 15 channels per second SENSITIVITY: fm =0 5µV for hf. & v.h f, 0 7µV for u.hf. all 1248 SINAD; SEARCH RATE. 25 frequencies per second for h f &vhf, . 1.5µV for u.h.f. all 10dB SINAD MEMORIES: 100 SELECTIVITY 60dB ±20kHz FEATURES. antenna, earpiece, a.c. adapter included RESOLUTION 5, 10, 12 5kHz AOR AR800E REVIEWED IMAGE REJECTION more than 40dB PRICE 11225' IF STAGE Saiko SC -1600 AUDIO OUTPUT. 250mW into 80 TYPE. hand-held SCAN RATE '0 channels per second COVERAGE 75-105.118-136.140-174, 406-495, 830-950MHz TYPE- mobile SEARCH RATE MODESa m., f.m. Bearcat 21OXW MEMORIES '6 COVERAGE- 10MHz within 65- SENSITIVITY: 75-105. 118-136 & 140-174MHz = 0.40V: 406-495MHz = 0.51.V. 830- FEATURES priorityand memory lockout on 90MHz. 20MHz within 130-175MHz. 950MHz = 1 iN all a 12dN SINAD: 118-136MHz a.m. = 0.8µV ® 10d8 S/N scan, selectable a.m./f.m. 30MHz within 390-500MHz SELECTIVITY- -2348 50 ±12.5kHz, -45dB a ±25kHz TYPE REVIEWED What Scanner Autumn 1990 MODESn.b.f.m. RESOLUTION- 5.10,12. 5kHz Iv.h f.(.12.5kHz(u h.f 1,25kHz (offset by12.5kHz)on830- COVERAGE: 30-50. 136-174, 406-512MHz (with SWM) SENSITIVITY 1 0µV for 10dB S/N 950MHz MODES f m. PRICE: £199 SELECTIVITY ±15kHz5050dB,±7kHz IMAGE REJECTION -24d8 ®145MHz SENSITIVITY 30-50 & 136-174MHz = 0.3µV, 406- ód8 IF STAGE 21 4MHz. 455kHz RESOLUTION 5kHz AUDIO OUTPUT: 140mW at 10% t.h.d. SELECTIVITY 1.-25kHz 55dB REJECTION: -40dB SCAN RATE. 13 channels per second RESOLUTION 5kHz : 10 7MHz. 455kHz SEARCH RATE. 7.5 seconds per MHz at 12.5kHz steps IMAGE REJECTION 1.5W © 10%t.h.d. MEMORIES 20 IF STAGE TE FEATURES. NiCad battery packand charger supplied, two helical antennas, illuminated AUDIO OUTPUTI SW r.ms. into 811®10% t.h.d. TYPE ,and -held RATE I.c.d readout and delay/hold function SCAN RATE COVERAGE.108-135.975MHz 16 REVIEWED. SEARCH RATE MODES a m FEATURESSquelch,delaykey.I.cd PRICE: £169 MEMORIES 20 SENSITIVITY' 0.51N 12dB SINAD channel display, d cpower cable, FEATURES. lockout facility, delay funcion telescopic SELECTIVITY -59d13 25kHz bracket supplied -a supplied RESOLUTION 25, 50kHz REVIEWED: IMAGE REJECTION: -55dB 60' Kenwood RZ-1 PRICE E169' IF STAGE 10 7MHz. 455kHz AUDIO OUTPUT:320mW at 10%t.h.d. TYPE: base/mobile station SCAN RATE. 10 channels per second COVERAGE: 500kH z -905M H z the SEARCH RATE 5 seconds per MHz at 25kHz steps MODES: a.m, n.b.f.m., w b.f.m. SCAN RATE Bearcat 800XLT MEMORIES: 20 SENSITIVITY am. = 5µV 40 10dB S/ SEARCH RATE FEATURES. priority channel, display/hold, channel lockout, keyboard lock, external Vn.b.f.m. = 6µV ® 12dB SINAD. 60- MEMORIES. 100 power and speaker lacks, display lighting TYPE mobile/base station 105MHz = 3µV, w.b.f.m. =1µV FEATURES. text store feature, picture REVIEWED: Short Wave Magazine December 19881£165 back issue) COVERAGE 29-54, 118-174, 406-512, 806-912MHz SELECTIVITY symbols available on display PRICE: £179 MODES: f.m. RESOLUTION í 5 20,25kHz REVIEWED: Short Wave Magazine April 1988 (£165 back issue) SENSITIVITY. 29-54 & 136-174MHz = 0.31.1V, 118- IMAGE REJECTION. 136MHz = 0 8µV, 406-512MHz = 0.5µV. 840-912MHz = IF STAGE 75, 10.7MHz PRICE: E459 0.7µV Uniden Bearcat 580XLT AUDIO OUTPUT: 2W into 811®5% SELECTIVITY: -55dB 0±25kHz RESOLUTION: 5, 125, 25kHz IMAGE REJECTION: TYPE. mobile/base station Sony ICF PRO -80 IF STAGE: COVERAGE29-54,118.174, 406-512MHz AUDIO OUTPUT: 1.5W © 10% t.h.d. MODES a.m., f.m. SCAN RATE 15 channels per second (rapid) SENSITIVITY h.f.&v.hf.=0.4µV,uhf.=0.5µV all e TYPE hand-held SEARCH RATE: 15 frequencies per second ' 2d8 SINAD COVERAGE: 15OkHz-1(WvIHz (115.15kHz - 223MHz using FRG -80 converter) MEMORIES 40 SELECTIVITY -55dB a 25MHz MODES w.b.a.m., n.b.a.m., f m_ n.b.f.m., s.s.b. FEATURES ororiry channel, scan delay, direct channel access and channel RESOLUTION 510. 12.5kHz SENSITIVITY: I.w. & m.w. = 424801, 1 m. = 9d 3048 S/N lockout IMAGE REJECTION. SELECTIVITY: 3.8kHz 50 50d8, ±400kHz ® 5840 for f.m. REVIEWED: Short Wave Magazine March 1989 (f1.65 back issue) IF STAGE RESOLUTION 3, 5, 10, 50kHz plus fine tune PRICE: £257' AUDIO OUTPUT. 2.5W a 10% t.h.d. IMAGE REJECTION 77d811.w., m.w., s w., v.h f.). 4048 )f.m.) SCAN RATE 15 channels per second IF STAGE 55 845MHz, 455kHz, 10.7MHz (f.m.) SEARCH RATE' AUDIO OUTPUT. 400mW at 10% Lh.d. MEMORIES. 100 SCAN RATE Icom IC-Rl FEATURES: 2 second delay, lockout, priorityscar SEARCH RATE REVIEWED: MEMORIES: 40 PRICE: £199' FEATURES converter supplied, soft case, shoulder belt, frequency handbook, key TYPE hand-held t facility, fine tune control COVERAGE 100kHz-1.3GHz WED: Short Wave Magazine March 1 'r: (£1.65 back issue) MODES: a.m.. n.b.f.m., w b.f.m. 2S8 SENSITIVITY: a.m = 1.60V (2-25MHz) 0.79µV 125- 905MHz) for 10d8 S/N: n b f m = 0 7911/ (2-25MHz)

Sony AIR -7 0 411(25-905MHz) w.b.f.m. = 6.30V (2-25MHz) 3.16µ1/ 125-905MHz) for 12dB SINAD TYPE land -held SELECTIVITY. a.m more than 15kHz/-6dB, n.b.f.m. COVERAGE 150kHz-2.19MHz, 76-136, 144-174MHz Signal R-535 more than 15kHz/-6d8, w.b f.m. more than150kHz/- MODES a.m., w.b.f.m., n.b.f.m. I 6dB SENSITIVITY: f.m. = 20/ GP 20dB S/N. airband = TYPE base station RESOLUTION: 0.5, 5, 8, 9,10,12.5, 15, 20, 25, 30 or 50kHz 1.2511V 40 12dB SINAD, 144.174MHz =0.5µV ©12dB COVERAGE 108-142.995, 220-379.995MHz IMAGE REJECTION: SINAD MODESa M. SELECTIVITY SENSITIVITY: v.h.f. =0320/, u.h.f. = 0.46µV both for 12d8 SINAD IF STAGE 266.7000-266.7095MHz,10.7MHz, 455kHz RESOLUTION 5, 9, 10,25 or 50kHz SELECTIVITY ±25kHz a 55dB AUDIO OUTPUT 150mW 40 10% t.h.d SCAN RATE IMAGE REJECTION: RESOLUTION 5, 10. 25, 50,100kHz (v.h.f.(; 25,50.100, 500kHz, 1MHz (u.h.f.) SEARCH RATE. IF STAGE IMAGE REJECTION v.h.f. =>-55d8, u.h.f. =>-25dB AUDIO OUTPUT 400mW into 8f2 IF STAGE 21 4MHz, 455kHz MEMORIES. 100 SCAN RATE AUDIO OUTPUT 360mW into 811 FEATURES: multi -scan function, built-in S -meter, buih- in SEARCH RATE SCAN RATE 12 channels per second clock with timer REVIEWED: Practical Wireless July 1990 (£1.65 back MEMORIES 10 SEARCH RATE. 25 seconds per MHz in 25kHz steps issue) FEATURES. key protect, backlit I.c.d. readout, priority MEMORIES. 60 PRICE: £359 channel FEATURES connection of RS232 interface possible REVIEWED: Practical Wireless November 1986 (85p :'anortable operation available photocopy) REVIEWED. PRICE E229 PRICE: £254 Standard AX700 Revco RS -3000

TYPE base station COVERAGE 26-32, 60-90, 118.180, 380-512MHz MODES - n.b.f.m. SENSITIVITY v.h.f. & h.f. = 0.5µY, airband & u.h.f = u.:: IlB SM SELECTIVITY RESOLUTION 5, 12 5, 25kHz IMAGE REJECTION: IF STAGE 21 4MHz. 455kHz AUDIO OUTPUT. 1.5W © 10% t.h.d. TYPE ease/mobile AUDIO OUTPUT. more than 1.6W in 8f0 a 10% t.h.d. SCAN RATE COVERAGE 50-504.995 M H z SCAN RATE SEARCH RATE. MODES: a.m., w.b.f.m., n.b.f.m. SEARCH RATE: MEMORIES 50 SENSf'tVITY:a.m.=3µV®10dBS/N.n.b.f.m = MEMORIES 100 FEATUREScompactsize, l.c.d. readout. priority =1µV both for 12dB SINAD FEATURES. telescopic antenna supplied, I.c.d. readout, memory channel SELECTIVITY: backlit dsiaply, spectral display REVIEWED Short Wave Magazine June I :: 1160 RESOLUTION 1 510. 12.5, 20, 25kHz REVIEWED: backissue) IMAGE REJECTION PRICE £545 PRICE: E199Á0' IF STAGE

WHAT SCANNER, AUTUMN 1991 -PAGE 10 Icom IC R7000HF

Uniden Bearcat UBC200XLT

TYPE: hand-held COVERAGE: 66-88,118-174, 406-512, 806-956MHz 1 1 MODES: a.m.. f.m. SENSITIVITY: 66-88 & 406-512MHz = 0.3µV,118-136 & 806-956MHz = 0.6 TYPE: base station IMAGE REJECTION- <60dB 136-174MHz = 0.4µV SELECTIVITY -55(18 ®±25kHz COVERAGE 25-999.999, 1025- IF STAGE. 778.7 or 226.7, 10.7MHz, 1999.999MHz 455kHz RESOLUTION 5kHz IMAGE REJECTION MODES. a.m., f.m, s.s.b. AUDIO OUTPUT 2.5W IF STAGE SENSITIVITY: 25-999.999MHz n.b.f.m. SCAN RATE: 2 or 7 channels per AUDIO OUTPUT. 500mW max >0.5µV, f m >1 0µV both for 12dB SINAD; second a.m. >1.01tV for 10dB S:N, s.s.b. >0.3µV SEARCH RATE not given SCAN RATE 15 channels per second SEARCH RATE 25 frequencies per second both for 10dB S:N MEMORIES 100 Bearcat 100FB MEMORIES 200 SELECTIVITY: f.m., a.m. = 7.5kHz © - FEATURES. FEATURES. memory back-up, priority scan,I.c.d. 6dB, n.b.f.m. = 3kHz ® -6dB, f.m. 75kHz REVIEWED: Short Wave Magazine readout, lockout TYPE. hand-held ® -6dB, s.s. b. =1.4kHz © -6dB December 19891£1 65 back issue) REVIEWED: COVERAGE: 66-89, 138-174, 406-512MHz RESOLUTION: 100Hz mm PRICE: £995 MODES: f.m. PRICE: £229.00 SENSITIVITY: 66 - 88 & 138 - 174MHz = 0.6µV. 406-512MHz = 1µV both 8012dB SINAD SELECTIVITY 50dB 9 ±25kHz Uniden Bearcat RESOLUTION 5 & 12 5kHz ASA AIR PRO II IMAGE REJECTION, BC590XLT IF STAGE TYPE: hand-held AUDIO OUTPUT 300mW TYPE-obile COVERAGE: 520kHz-1.65MHz, 88-108, 118-136, 162.5MHz SCAN RATE 15 channels per second COVERAGE: 29-54, 118-174, 406-512MHz MODES: a.m., f.m. SEARCH RATE 15 channels per second MODES am,fm. SENSITIVITY. a.m. = 4.7mV/m ® 20d8 SINAD, f.m. = 4µV MEMORIES- 16 SENSITIVITY: 29-54 & 136-174MHz = 04µV. 11/- SELECTIVITY: a.m. =1048, f.m. = 2548 FEATURES: low battery warning lamp and lockout facility 136MHz = 0 8µV, 406-512MHz = 0.5µV RESOLUTION REVIEWED. Practical Wireless September 1982 (reprint available ® 85p) SELECTIVITY. -55dB ®±25kHz IMAGE REJECTION a m. = 2548. f m. = 20dB PRICE: f253 when new, now second-hand RESOLUTION: 5kHz min IF STAGE IMAGE REJECTION. AUDIO OUTPUT 170mW IF STAGE SCAN RATE AUDIO OUTPUT 2.5W © 10% t.h.d. SEARCH RATE. SCAN RATE 15 channels per second MEMORIES Icom IC -R9000 SEARCH RATE. FEATURES: I.c.d. readout, external power supply port MEMORIES: 100 REVIEWED: FEATURES: lockout. telescopic antenna included PRICE: £50 TYPE base station REVIEWED: COVERAGE 100kHz - 1.99986Hz Icom PRICE: f 199.00' MODES a.m., n.b.f.m., w.b.f.m., s.s.b., f.s.k., c.w. IC -R100 SENSITIVITY: 100-500kHz = 0.5µV s.s.b., c.w., f.s.k. 3.2µV a.m.: 500kHz-1.799MHz =1.0µV a.m. 6.3µV;1.8- Fairmate HP -100E MkII 29 999MHz = s.s.b., c.w., f.s.k. 0.16µV a.m. 1.01V;30- 999.99MHz = s.s.b., c.w., f.s.k. 0.32µV. a.m. 1.4µV TYPE: mobile/base station nbfm. 0.5µV w.b.f.m. 1.4µV; 1-1.23996Hz = s.s.b., COVERAGE: 1 00kHz-1.856G Hz TYPE: hand-held c.w., f.s.k. 0.63µV a.m. 4.0µV n.b.f.m. 1.0µV w.b.f.m. MODES: a.m., n.b.f.m., w.b.f.m. COVERAGE 8-600, 830-1300MHz 4.01.V; 1.24-1.29996Hz = s.s.b., c.w., f.s k. 0.32µV a.m. SENSITIVITY: 500kHz-1.6295MHz = a.m. 3.21.8/; 1.63- MODES: a.m., n.b.f.m., w.b.f.m. 2.0µV n.b.f.m. 0.5µV w.b f.m. 2.011, 1.3-1.59996Hz = 49.9995MHz = a.m. 1.6µV n.b.f.m. 0.56µV; 50- SENSITIVITY: 8-550, 805-1300MHz less s.s.b., c.w., f.s.k. 0.63µV a.m. 40µV n.b.f.m. 1.0µV 904.9995MHz = am. 0.5616/ n.b.f.m. 0.20/ w.b.f.m. than 0.5µU for 12dB SINAD, 25.550MHz a.m. w.b.f.m. 4.0µV:1.6-1.99986Hz=s.s.b , c w., f.s.k.1 AA/ 0.630/:905-1380.4875MHz=a.m.1.01d/ n.b.f.m. 0.320/ less than 2µV, w.b.f.m. less than 3µV a.m 5.6µµVV n.b.f.m.1.4µV w.b.f.m. 5.6µV w.b.f.m. 0 79µV; 13805-1.86Hz = a.m. 1.416/ n.b.f.m. SELECTIVITY. SELECTIVITY s s.b., c.w. f.s.k = more than 2.4kHz/- 0.450/ w.b.f.m. 1.10/ RESOLUTION 5-995kHz selectable 6dB; a.m. = more than 6kHz/-648; n.b.f.m. = more than SELECTIVITY: a.m = more than 6kHz/-6dB. n.b.f.m._ IMAGE REJECTION 15kHz/-6d0 w.b.f.m. = more than 150kHz/-6dB more than 15kHz/-6dB, w.b.f.m. = more than 180kHz/- IF STAGE 561 225, 58.075MHz, 455kHz RESOLUTION: not known 3dB AUDIO OUTPUT over 100mW for 10% t.h.d. IMAGE REJECTION: RESOLUTION 1. 5, 8. 10, 12.5, 20, 25kHz SCAN RATE:40 channels per second IF STAGE: 48.79376-48.8, 776.60001-778.7, IMAGE REJECTION: SEARCH RATE: 27060001-2707, 10.7MHz, 455kHz IF STAGE MEMORIES: 1000 AUDIO OUTPUT: more than 2.5W into 812 80 10% AUDIO OUTPUT. more than 2.5W at 10% t.h.d. FEATURES: NiCads, two antennas, carry t.hd SCAN RATE case, shoulder strap, belt clip, d.c. cable and SCAN RATE SEARCH RATE: earpiece provided SEARCH RATE. MEMORIES: 100 REVIEWED:Short Wave Magazine February 1990 MEMORIES FEATURES: 11.65 back issue) FEATURES REVIEWED PRICE: E 299.00 REVIEWED Short Wave Magazine April 1989101.651 PRICE: E485 PRICE: f7=7.5 00

Realistic PRO -2005 Uniden Bearcat UBC5OXL AOR AR -3000

TYPE: base station TYPE base station Regency MX7000 COVERAGE: 100kHz-2.036G Hz COVERAGE 25-520, 760-1300MHz TYPE: hand-held MODES: a.m., n.b.f.m., w.b.f.m., s.s.b., c.w. MODES: a.m., n.b.f.m., w.b.f.m. COVERAGE 66-88, 136-174, 406-512MHz TYPE: Base station SENSITIVITY: 100kHz-2.5MHz s.s.b., c.w. = 1.01.tV SENSITIVITY w.b.f.m. 25-520 & 760-1100MHz = MODES: a.m., f.m. COVERAGE 25-550, 800-1300MHz a.m. = 3.2µV; 2.5MHz-1.8GHz s.s.b., c.w. = 0 25µV, a.m. 3µV,1100-1300MHz =10µV; n.b.f.m. 25-520 & 760- SENSITIVITY: 66->: MHz= 0.4µV,136-174 & 406- MODES: a.m., n.b.f.m., w.b.f.m. =1.0µV, n.b.f.m. = 0.350V, w.b.f.m. = 3.0µV; 1.8-2GHz 1100MHz = 0.5µV, 1100-1300MHz = 3µV; a.m. 25- 512MHz = 0 711V all for 12d8 SINAD SENSITIVITY:n.b.f.m.=0.4µV w.b.f.m.=1.0µV both s.s.b., c.w. = 0.75µV, a.m. = 3.0µV, n.b.f.m. = 1.25µV, 520 & 760-1100MHz SELECTIVITY -55dB ®±25kHz íg 12dB SINAD; a.m. = 0.81V ®10dB s/n w.b.f.m. = 3.01PV SELECTIVITY: n.b.f.m. &a. m.=39kHz-6dB,t15kHz RESOLUTION SELECTIVITY: n.b f m t 7 5kHz, w.b.f.m. = 35 -kHz, SELECTIVITY: s s b. & c.w = 2.4kHz/-6dB 4.5kHz/- -50dB, w.b.f.m. = ±150kHz -6dB, ±300kHz -5048 WAIAGEREJECTION. a.m. = 35kHz all t$ 6dB 60dB; a.m. & n.b.f.m. = 12kHz/-6dB, 25kHz/-70dB; RESOLUTION: 5kHz min IF STAGE RESOLUTION- 5, 12.5 & 25kHz w.b.f.m. = 180kHz/-6dB, 550kHz/-50dB IMAGE REJECTION- 610MHz 80 70MHz 60dB, AUDIO OUTPUT: 400mW into 063 IMAGE REJECTION: -50dB RESOLUTION 608MHz 80 1000MHz 60dB SCAN RATE 10 channels per second IF STAGE: 750, 45.03, 5.5, 455kHz IMAGE REJECTION IF STAGE. SEARCH RATE: AUDIO OUTPUT: 1 W © 10% t.h.d. IF STAGE AUDIO OUTPUT: 1.3W MEMORIES: 10 SCAN RATE 5 channels per second AUDIO OUTPUT: 1.4W into 46110% t.h.d., 0.7W into SCAN RATE: 8 or 16 channels per second FEATURES. low battery indicator, memory back- SEARCH RATE. 6 seconds per MHz 131110%t.h d. SEARCH RATE: 8 or 16 frequencies per second up, lockout MEMORIES. 20 SCAN RATE: 20 channels per second MEMORIES. 400 permanent, 10 temporary REVIEWED: FEATURES: tuning dial as well as keypad, priority SEARCH RATE 20 steps per second FEATURES: PRICE f100" channel, mains adapter and mounting bracket avail- MEMORIES: 400 REVIEWED Short Wave Magazine September 1989 able as extras. FEATURES: 11.65 back issue) REVIEWED: REVIEWED: Short Wave MagazineJanuary 1990)£1.65 PRICE: £340 PRICE: £399 back issue) PRICE £765.00

AOR AR900 Uniden Bearcat UBC760XLT Cobra SR925 TYPE- hand-held TYPE: mobile/base station COVERAGE 108-174, 220-380, 406-470MHz, 830- TYPE base station 950MHz COVERAGE 66-88,108-174, 350-512. 806-956MHz COVERAGE 29-54MHz, 118-174MHz, 406-512MHz MODES: a.m., f.m. MODES- a.m., f.m. MODES: SENSITIVITY: 66-88MHz = 0.30V, 136-174 & 406-512MHz = SENSITIVITY: 0.4µV v.h.f.hi & lo, 0.8µV v.h.f. air, SENSITIVITY 0 3µJ 80 29-54 & 136-174MHz, 0.5µV O5µVuhf,1µV000MHz 0. V, 108.136MHz = 0.6µV, 806-956MHz = 0.80V 0 406-512MHz, 0 WC 118-135.975MHz SELECTIVITY: SELECTIVITY: -5548 ®t25kHz SELECTIVITY. -55dB © ±25kHz RESOLUTION' 5, 10, 12.5.25kHz RESOLUTION RESOLUTION-25,hz IMAGE REJECTION. IMAGE REJECTION. IMAGE REJECTION IF STAGE IF STAGE IF STAGE AUDIO OUTPUT 120mW ®10% t.h.d. AUDIO OUTPUT. 2W 80 10% t.h.d. AUDIO OUTPUT. 1W into 811 at 10% t.h.d. SCAN RATE 15 channels per second SCAN RATE 15 channels per second SCAN RATE SEARCH RATE: SEARCH RATE SEARCH RATE: MEMORIES. 100 MEMORIES: 100 MEMORIES: 16 FEATURES. supplied with NiCads, mains powered FEATURES: backlit controls, options include signal booster FEATURES: charger, two flexible antennas pre -amplifier, CTCSS tone squelch decoder REVIEWED: Short Wave Magazine April 1990 )01.65 REVIEWED. REVIEWED: back issue) PRICE: f199 PRICE: £235.00 PRICE:£154r

WHAT SCANNER, AUTUMN 1991 - PAGE 11 Unless you happen to live by Uniden, Belgium, and very close to the borders of apparently adapted for the another country 'International European market, has only 16 Scanning at u.h.f.' sounds memories and a limited almost like a contradiction in frequency coverage. It might terms. The very characteristics not win prizes for sensitivity, which make v.h.f. and u.h.f. performance and coverage so conveniently re -useable, International but conversly a temporary by definition make it impounding by the authroities impossible to listen to what is would be less financially happening on those channels damaging as it is now several more than 50 or so miles Scanning in years od. away. Much of Europe >>sps the Yes, I know that there are band 66-87MHz for mobile many fellow listeners who will radio services and the UBC claim QSLs from much greater the UHF has that band together with distances, but some of us like the airbands (which it to listen to the sort of action switches to a.m. channels that are not famed automatically), the v.h.f. for long distance propagation. Bands band 136-174MHz and 406- Police, fire, utility channels 512MHz u.h.f. As an aside, have their devotees on both the majority of mobile sides of the Atlantic it seems. David Simpson services on the 66-87MHz And even in the relatively bands inthe UK use a.m., so close confines of multi- the UBC100XL is really only national Western Europe, suitable for the other three language barriers limit any bands listed. truly international scanning any sort of long and complex My interest as already possibilities. Dangerous Cargo? explanation - leading may be stated is mainly in the utilities On top of all that, to the confiscation of my channels which I felt would regulations in most countries Six hours before the flight is scanner. Would I be allowed be adequately covered by place restriction on what you due to depart from London's to take it into the USA? the Bearcat and knowing the may, or more often may NOT, Heathrow airport to San Attempts to check with Her USA to be predominately f.m., listen to! Francisco is hardly the time to Majesties' Customs and Excise the choice was made. As a keen scanner user and be agonising on whether you department by telephone the regular subscriber to a ought to take a scanner with evening before leaving Don't attract attention number of periodicals and you! proved impossible and so the magazines, I read every I was aware that certain decision had to be made to At the airport the security was month about the USA and states have anti -scanner laws 'try it and see'. reassuringly extensive, but what frequencies and but my understanding was not inconveniently so. The equipment is in use. Readers that California is reasonably Old Faithful Bearcat got no more that a in the USA may be surprised liberal. Perhaps another cursory glance from the first that details which are contributor inthe US might The next decision was a little stage of Pan -Am security. So regarded as being in the write an article on which easier. The Icom R7000 is not far so good. public domain in the States states permit scanners and made for portability and for It was spotted in my hand are seen quite differently and which don't. that reason is virtually built in baggage on the X -Ray often restricted by law in other The increased problems of to the monitoring post. An machines at the second countries. To see frequency security on all flights has got RS3000, which may not be stage. I was asked to switch it information in print, freely to be a very important familiar to American readers on, which brought up the available and published in consideration. My carrier to but which incorporates a.m., 1.c.d. and seemed to satisfy magazines would bring angst the West Coast was to be Pan - essential for listening to UK the security requirement. to most bureaucrats in Europe. Am which, since the mobile systems could be used I had expected it to be I was keen to hear some of Lockerbie disaster is now inthe rental car, as could the asked to surrender it during the station based in places reputedly one of the most Yaesu FRG -9600. Both were the flight; this has happened which were only names on a security conscious at London's rejected on the grounds of to me on domestic UK flights map, or at best, seen in the Heathrow, and almost as being less adaptable than a in the past when carrying movies. rigourous as the legendary El hand -portable. two-way radio rquipment. In A trip to California was too Al. Clearly there would only The next decision... which any event I had no intention good an opportunity to miss. be one way to find out hand-held unit? of using it in flight. We Brits do But how was I going to be whether a scanner scheduled A newly acquired Fairmate tend to be more reserved able to fulfil this ambition to for the most innocent and HP 100 (which appeared in than our American cousins hear local inoffensive of iises could the US as the AR 1000) seemed and don't usually like to make its way pcist security. to present too much in the attract attention to ourselves channels? Would I be targetted as a way of potential trouble at by doing anything out of the The cost of buying potential terrorist? Might it the Customs posts, despite the 'ordinary' and quite apart equipment locally to use for a look too much like a walkie- attraction of 1000 memories from anything else, I am very short period ruled out that talkie ready to be used to co- and a coverage of 25- conscious of the possibilities of possibility and scanners are ordinate some diversion to a 1300MHz I could not bear the local oscillator interference to not the sort of thing you can Middle East destination? I possibillity that this unit might sensitive aeronautical rent from Hertz (however would soon find out. be impounded at Customs systems. appropriate it sounds!). What about bringing the either on the way out or re- Through to the departure There was nothing else for unit back into the UK? entering the UK. lounge without incident. it. Somehow I would have to Customs people see all sorts of Only one option was left I had plenty of time before take a scanner with me from strange items, but I did not open to me. The old faithful boarding and sought out the the UK. really fancy going through Bearcat UBC100XL distributed UK customs desk which is WHAT SCANNER, AUTUMN 1991 - PAGE 12 AR2500 & AR2800= Versatile receivers from AOR...

Base - mobile scanning receiversThe BFO allows selection of The AR280O's strong pointist}AR25O0 either side -band andthefine Coverage: 5 - 550 & 800- 1300MHz featuring coverage from superior SSB/CW receiveChannel steps: 5. 12.5 & 25kHz shortwavetomicrowaves.All shift control ensures theveryperformance and versatility, best audio quality. Modes: AM, FM(N). FM(W).SSB. CW mode operation AM, FM Power: 11 - 16V DC (narrow), FM (wide) and built-in Amateur band CW reception is Memories: 1984 (64 x 32) BFO for SSB (USB. LSB and CW) The AR2500 was conceived inof a crisp and clean tone. TheSearch bands: 16 the USA where listeners desiredream of listeningtolongSearch/scan speed: Upto 36 Massive memory storage backed computer controlvia theRS232distance communications fromchannels or increments per second anport ata budget price, IBM-PCyour home (with an externalAerial Input: 50 OHM BNC up permanently with Size: 150 x 55 x 180 mm EEPROM sonobatteryisbased software(writtenbyaerial) is now a reality. Weight: 65og required.Operation is from aG4SGI) shouldbeavailable nominal 13.8V DC supply (power toward the end of 1991. The AR2800 isuser friendly AR2800 supply included). and employs a conventionalCoverage: 500kHz - 600MHz & The AR2500 has a massivememory channel and search800-1300MHz SSB is used by many servicesmemorycapacity(Elephant bank layout (similartotheChannel steps: Programmable In 5 especiallyon shortwave memory)and fastturbo speedpopular AR2000). & 12.5kHz opto 995kHz (including Amateur band andsearch and scan. There are 1984 Modes: AM. FM(N),FM(W), SSB, CW Power: I 1- 16V DC oceanic airband) to extend thememories (62 banks x 32 ch)There are 1000 memories andMemories: 1000 (100 x 10) operationalcoverageoftheirand 16 search banks. 10 search banks. An internalSearch bands: 10 transceivers.It'sinclusion on rechargeableNICad battery isSearch/scan speed: Upto 20 thesereceiversisn't justanThe AR2500 covers5 MHz to 550now includedtopermitchannels or Increments per second added bonus but a positive MHz and 800 MHz to 1300 MHz. operation away from the homeAerial input: 50 OHM BNC asset. and car. TheAR2800 coversSize: 150 x 55 x 180 mm 500 kHz to 600 MHz and 800Weight: 1050g MHz to 1300 MHz. AR2500 R.R.P. £419.00 Inc. VAT AR2800 R.R.P. £395.00 Inc. VAT Fach set is supplied with' Carriage by post £5.00 extra Mains power supply Please send S.S.A.E. /Telescopic aerial Mobile mount 434p) for detailed

DC lead leaflets and full price Operating manual list - thank you.

O

A.RAOR (UK) Ltd Room 2, Adam Bede High Tech Centre, Derby Road, Wirksworth, Derbys. DE4 4BG. Tel: 0629 - 825926 Fax: 0629 - 825927 E&OE.

RADIO SHACK for SCANNERS AND ACCESSORIES SPECIAL PRICE!PRO -2006 (£329.95) £249.95until Christmas PC Software for PRO -2006 availablesoon!

Pro -38 10 Channel Handy Scanner with free telescopic antenna as well AR -2800 Base version of the AOR-2000 £395.00 as flex £79.95 AR -3000 All Mode Scanner, 100kHz-2036 MHz f765.00 Pro -35 100 Ch Handy Scanner with free telescopic antenna as well as ACEPAC3IBM-PC Software to control AR -3000 f119.00 flexi £179.95 IC -R1 100kHz-1300 MHz handy Scanner, miniature size £369.00 Pro -37 200 Ch Handy Scanner with free nicads & charger, value £23.49...1229.95 IC -R100 High Performance Base/Mobile Scanner £485.00 Pro -2022 200 Ch AC/DC Scanner with free mobile antenna £179.95 IC -R7000 25-2000MHz High Performance Receiver/Scanner £875.00 Pro -2024 60 Ch AC Scanner (was £179.95) with free fequency guide £99.95 IC -R7100 25-2000MHz High Performance Receiver/Scanner Pro -2006 400 Ch AC/DC scanner 1300 MHz (£329.95) .£249.95 1000 memories £1040.00 AR -950 100 Ch Base/Mobile Scanner with free mobile antenna £249.00 IC -R9000 The Ultimate CAI/ US AR -2000 1000 Ch handy Scanner 0.5-1300 MHz with free frequency guide...1259.00 MS -1000 Nevada Base Scanner .£279.00 AR -2500 The latest from AOR £395.00 73sTerry Edwards G3STS 188 BROADHURST GARDENS, LONDON, NW6 3AY (Just around the comer from West Hampstead Station on the Jubilee Line) Tel: 071-624 7174 Fax: 071-328 5066

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'3 International Scanning there really to assist non -EEC area. Well, in visitors to recover local taxes in the UHF Bands fairness it is called The Bay paid whilst in Britain. I Area Scanner Book. explained to the helpful minimise irritation to my delaer I could find in the San After that my main young customs officer that I travelling companion, I Francisco area was a little problem, of course, was did not relish the possibility of searched around the disappointing. Perhaps my deciphering what was being spending my first few hours standard u.h.f. bands at 450/ expectations were too great, said and which ccnllsign back in England arguing that 460MHz. but I found a relatively small referred to what. Just the UK tax had already been Lots of interesting traffic, selection of scanning same problem as going to a paid on my equipment; I although the often -cited 'two equipment in a shop which different area inthe UK for the could foresee difficulties in nations divided by a common was more geared to CB and first time except that no explaining what the language' came to mind as I computer games. Maybe similar frequency listings exist equipment might be used for, tried to listen to West Coast specialist stores exist and in the UK, since it is an etc. accents talking rather quickly admittedly my time available offence under the Wireless He understood my in jargon and radio short- prevented me from exploring Telegraphy Act to listen to reasoning and wanted to see hand. How could I tell what I into the more distant sitlerbs. transmissions for which the the scanner. Was it the sort of was listening to? The easy I don't see any adverts in receiver is unlicensed - in thing that you could listen to familiarity of listening through magazines such as practical terms, anything the pilots of aircraft, he asked. the channels is jarred by lack Monitoring Times, and I except broadcast, CB and The easiest thing to do was of knowledge of geography, couldn't locate a scanner amateur bands. agree that it could be used for callsigns and all the other store in Los Angeles. It was also quite amazing exactly that, characteristics that are I did, however, find the for a UK visitor to see the In that case he could see no second nature on home answers to my problems at enormous amount of radio problem in bringing the ground. the same store. I figured that equipment around and things equipment back into the At first it seemed that it the charging adaptor like the radio tower (Mt country, and went to find a could be impossible to find provided with the Bearcat Sutro?); structures of that colleague to confirm his out 'who's who' in the limited gives 12V d.c. so I bought a height are generally judgement. How long had I time available. I did not know connector lead to power the broadcast stations in this owned it, the older customs the solution to this problem. Bearcat from the cigar -lighter country and I would be officer wanted to know, and I had a bigger concern. The in the car. Even as I write that interested to know what it is how much was it worth? NiCad batteries inthe Bearcat I can hear pens going to used for. Finally, they agreed that I would not last forever, and of paper while purists get ready One other sight shouldn't have any problems course the UK has a 240V to tell me that ten good disappointment was that bringing it back into the UK. supply system whereas the reasons why this should not frequency limitations of the They obviously felt the USA 1rss 110V. I knew before be done. Incidentally, the European Bearcat prevented same way I did about the leaving the UK that having Uniden dealer that I bought me from listening to the vagueness of this guarantee no 110V battery chargr the lead from knew what I famous California Highway and clearly shared my belief meant that I would have to planned to use it for, but Patrol (CHP), who utilise the in the old law that 'waht can make some other admitted that he did not 40MHz band (presumably to go womg, will'. Paul, the arrangements. Users of the know whether it would work compensate for the terrain young customs officer, and I Bearcat 100XL will know that or not. and distances between took the precaution of there is a small plastics cover My innocent reply is that it centres of population). exchanging details so that he to the battery compartment works. The whole experience was could vouch that the scanner held on by two small screws. My other purchase was The fascinating, and left me was mine, in case I should get Long ago these on my unit Bay Area Scanner Book wondering whether any other arrested for illegal had become worn and the published by the Base Station readers had taken scanners importation! battery cover distorted so I Inc, 1839 East Street, Concord, on an international trip? Some was very disinclined to undo CA 94520. It is easy to Ilse enterprising body might the panel and allow the use and well laid out; without it I arrange to hire scanners, who It may not be elegent but it of throw -away batteries. I would have taken me knows? In any case, I hope works would reserve that possiblity months, even if I had ever that these notes will be of 'till the last possible moment. thought to listen around cnssistence to anyone Within hours of arriving in Could I find an answer to 488MHz where most of the plainning to do the same wonderful San Francisco, I both my problems? The Bay action is, especially since the thing. was spotting SFPD cars with Area Yellow Pages were not UK mobile radio bands finish Did I have any problem re- u.h.f. antennas and also high hugely helpful in locating a at 470MHz. Besides, the listing entering the UK with my gain antennas which I scanner dealer or a Uniden even told me the right scanner? Not a bit. Nobody suspected were for 850MHz agent in San Francisco. channels to listen to in my asked about it at all. data systems. Where were all the scanner part of town, and lots more. Would I do it again? At the first opportunity, dealers I had expected to find Its only shortcoming for me I can hardly wait and the having remembered to bring in that great conurbation? was that it did not also cover first thing I'll buy is the local the deaf -aid type earpiece to A visit to the only Uniden my next port of call, i.e. the frequency list

SCANNER OWNERS © PW PUBLISHING LTD. 1991. * Listen in when you are 'out' with the amazing AUTO -VOX * Connect to any receiver with a swuelch control and the AUTO -VOX will automatically switch your tape recorder on and oft as signals are detected. A MUST for all scanner owners. Copyright in all drawings, photographs and articles published in What Scanner is fully *Return to a neatly compressed tape of all the action * The AUTO -VOX may be tilted directly into larger protected and reproduction or imitation in whole or in part is expressly forbidden. All scanners or recorders. taking its power from the rig itself, or housed separately in the project box supplied. Supplied as a kit with all parts and instructions or ready built and tested. reasonable precautions are taken by What Scannerto ensure that the advice and data KIT £12.50 AUTO -VOX BUILT £25.00. given to our readers is reliable. We cannot however guarantee it and we cannot accept Send a SAE for full details and prices of all our Scanner Upgrades. legal responsibility for it. Prices are those current as we go to press. What Scanner is RADIO RESEARCH (SWIM), 3 Pasture Close, Whitmore, Staffs ST5 5D0 published by PW Publishing Ltd., Enefco House, The Quay, Poole Dorset BH15 1PP.

WHAT SCANNER, AUTUMN 1991 -PAGE 14 6 Royal Parade, Hangar Lane, Ealing, London W5A 1 ET, England. Tel: 081-997 4476. Fax: 081-991 2565

COMMUNICATIONS

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(fés-;11-(((ÁQU 081 991 PHONE \\\"`` ''. ; '.1i.ááC'",:1,il= ( `, `.`.2565 081 ¡4 997 (( l`,, '_ F 1 or 4476 usT10 '.....butloved Suppart - well Weeks tosell thatecidedyyou Why wait youhaveCALLUS. WhateVerm cleanbreak lauick of new Bestselection a d useeading makes. Lon AOR and a Comeand see Standard, JRC, lCpl, Yaesu,Kenwood, Opening Hours: Mday-Frayon 8.30-6.00pm Saturday 9.00-3.00pm NEW Reserved car parking at rear of showroom.All.EASYidTERMS ARE BASED ON AN APR OF 34.4" t,

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ACTIVE ANTENNA HF SSB and CW RECEIVERS Our range of simple, but very effective receivers opens up the world of long distance radio FOR SCANNERS communications fora very modest outlay. Most of the kits listed below are designated for use on various amateur bands. Give us a ring to discuss your requirements for frequencies not Ve IL o reamn shown hem. 10d6 At tenuetor Switch. The kits contain the electronics to build the receivers. 'Hardware packages' contain the mechanical items (case, dial, knobs, sockets etc) to go with the 'works' supplied in the basic 11 to 14V IA; kit. In addition, all our amateur band receivers have matching transmitters to suit the Novice and full amateur licence. These can be combined with other kits to form complete transceiver projects. rintwd Circuit Ant.nnw elements Interfere mvdeie SSB/CW RECEIVERS Kit Assembled PCB Scanning Receiver DXR10 3 Band (10,12 & 15M) for DX amateur work £26.60 £39.90 HOWES AA4 DcRx54 4 45MHz Aircraft band (rescue etc) £15.90 £22.70 The HOWES AA4 Active Antenna gives full coverage from 25 to 1303MHz. It is designed to be DcRx20, 40 or 80MSingle band amateur receivers. £15.90 £22.70 the ideal solution for those requiring a compact, broadband antenna for use with scanning DXR10 Hardware package.£14.90 DcRx Hardware package:£16.50 receivers. The AA4 features advanced technology with a low noise microwave IC amplifier. RECEIVER ACCESSORIES * Fully broad -band covering 25 to 1300MHz. CBA2 Buffer to enable use of DFD5 counter f5.90 f9.50 * Low noise microwave IC (NF <3dB). Over 15dB gain. IP3+15dBm. CSL4 Sharp, dual bandwidth (SSB & CW) filter £10.50 £17.40 * Coax powering 12 to 14V DC at less than 20mA. DCS2 'S Meter kit for above receivers £9.20 £13.80 DFD5 Digital frequency counter/display * 10dB switched attenuator on the receiver interface board. £41.50 £64.50 XM1 Crystal Calibrator, 8 marker frequencies £16.90 £22.80 * 16 inches long. 1.2 inches wide. Easy to build kit or ready built modules.

If your scanner reception could benefit from the addition of a remotely located antenna. or you CV100 - ADD SHORTWAVE TO YOUR SCANNER! would I ike a much neater, more compactal ternative to the ugly discone types, then the HOWES This kit converts 1 to 40MHz up to 101 to 140MHz so you can tune these frequencies with a AA4 could be just the job! You can read the review in the November '90 Short Wave Magazine. normal VHF scanner No mods to the radio amneeded. Excellent performance in a small space! CV100 kit:£26.50 Assembled PCBs: £37.90 AA4 Kit: £19.80 Assembled PCB modules: £26.80 PLEASE ADD £120 P&P to your total order value. AA2 ACTIVE ANTENNA for 150kHz to 30MHz HOWES KITS are produced by a professional RF design and manufacturing company. They The HOWES AA2 is the active antenna to use for general coverage HF reception. Broad -band contain a good quality printed circuit board with screen printed parts locations, full clear performance that does not tail off at the higher frequencies. The neat, compactanswer for those instructions and all board mounted components. Sales and technical advice are available by with limited space, holiday use, mobile operation etc. Two selectable gain settings, local or phone during office hours. Please send an SAE for our tree catalogue or specific productdata coax powering (12 to 14V). IP3 +38dBm. Easy to build and much liked by customers! sheets. ` AA2 Kit: (8.50 Assembled PCB: (12.90 73 from Dave G4KQH, Technical Manager.

15- WakTINLYNCH G4HKS THE AMATEUR RADIO EXCHANGE CENTRE .tr 286 Northfield Avenue, Ealing, Londony 4UB. Tel: 081566 1120 Fax: 081 566 1207

FOR THE STANDARD. LARGEST SELECTION YAESU OF O USED ICOM RECEIVERS, SCANNERS KENWOOD AND ALINCO ACCESSORIES, LOOKNO AMSTRAD FURTHER.FOR AUTHORISEDDEALER THELATEST NEW MODELS- WE HAVE THOSEAS WELL!! * LATEST MODELSIN STOCK: RECEIVER SHINWA * LOWEHF225 SR001REMOTE HAND HELD RECEIVER* KENWOOD SCANNER* NRD535 SCANNER* R5000* ICOM YUPITERUMVT-7000 AOR2000/AOR2500/AOR2800/AOR3000 MASSIVEICR7000HF/ICR72E/ICR7100/ICR1/ICR100* PLUS SCANNERS* selective ofUSED MANY RECEIVERSAND MORE,includinga ACCESSORIES- ALL FULLY A fullrange of GUARANTEED.* scanners, accessoriesare always Antennasincluding available,including Pre "ACTIVE"variations, -amps for hand Micro -reader,RS232 CONFIDENTIAL held/base Display, BPF1 FREQUENCY All the filters, the BOOKS,ERA equipment list goeson forever! guara u teed. is wiredfor instant Mail orderis our permanent speciality,justquotedemonstrationand your creditcardor Martin Lynchis a Licenced Full written Credit Broker. SPECIALOFFE detailsupon request. Typical APR36.8% 1 MONTH PHONE ONLY 081-5661120 SHINWA SR001 REMOTE For fast mail order Tel: 081-566 1120. CONTROL £10.50 for 48hour delivery. Please add SCANNER SHOP OPENING HOURS: Tuesday - Saturday 10 - 6pm. £299 24 hour SalesHOT LINE only . FAX 0860 339 339 order lineopen 24 hours (after hours

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