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Broaden the Bandwidth of the Datong Audio Filters t Manual AM/FM Switching For The PRO -32 Extra Selectivity For The FRG -8800 Broaden The Bandwidth Of The Datong Audio Filters 1.2 , 411 tws ar rA V,» oi ` d-i ,. \ PLUS...The Cormorant's Paper Bag - A Lightning Story 0CO Regular Features Include Airband, Scanning, Junior Listeners, SSB Utility Listening, Propagation, Amateur Bands, Long, Medium & Short Waves, Satellite TV Reports, Weather Satellites and More! 1 , I -7000 THE ULTIMATE WIDEBAND SCANNING RECEIVER * UN -SURPASSED SENSITIVITY * ILLUMINATED LCD DISPLAY * SUPER WIDEBAND COVERAGE * 200 MEMORY CHANNELS * MEMORY SEARCH PRIORITY S .AN o. ,- I..- .:°-°--. r._ ,. , ,: .. .:"c::_ ° i - .. y^., ..T., yr _'. ,.., ,. l!L4>SWT''..a.,-- .r.:..- ::.rY,`..«i-:r.. .: ''~ --51,:-.1..-.'...05;.»e::. J `o 4 t--"111-;..4..1...,.' . t: i.. -a:'' _,.1"~. ... ` : w`,i+,'^'-7 hó.[:.5:'.. 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Receive Modes: AM, FM, + Wide FM Frequency Steps: Available from your local dealer or direct 5/10/12.5/25/50/100kHz from the UK distributors: Sensitivity: 0.5µV for 12dB SINAD (FM narrow mode) NEVADA COMMUNICATIONS Search Rate: 20 steps/sec 189 LONDON ROAD Scan Rate: 16 channels/sec PORTSMOUTH 9AE RECeI P02 BARD MULTI USE YOUR CREDIT CARD FOR SAME DAY DESPATCH ORDER HOTLINE (0705) 662145 i VOL. contents 50 ISSUE 8 AUGUST 1992 ON SALE JULY 23 15 NOAA Satellite Predictor Program (Next Issue on sale AUGUST 27) Version 2.0 Peter Rouse GU 1 DKD EDITOR: Dick Ganderton, C. Eng., MIEE, G8VFH ART EDITOR: Steve Hunt NEWS & FEATURES: Elaine Richards G4LFM 16 Have You a Cormorant's Paper Bag? P.E.W. Alleyley GW3KJW EDITORIAL Enefco House, The Quay, Poole, Dorset BH15 1PP 23 MODS SPECIAL TEL (0202) 678558 FAX (0202) 666244 CREDIT CARD ORDERS: (0202)665524 23 A Battery Problem Solved (Out of hours service by answering machine) George Millmore 24 Manual AM/FM for the ADVERTISEMENT DEPARTMENT Realistic PRO -32 ADVERTISEMENT MANAGER A.D. Ayres Roger Hall G4TNT 29 Broadening the TEL: 071-731 6222 Cellphone: 0850 382666 Bandwidth of the Datong FAX: 071-3841031 ADVERTISEMENT PRODUCTION (Poole) FL2 & FL3 Audio Filters Marcia Brogan Don Phillips M.Sc TEL: (0202) 676033 31 An Extra Selectivity Option FAX: (0202) 666244 for the Yaesu FRG -8800 © PW PUBLISHING LTD. 1992. Don Phillips M.Sc Copyright in all drawings, photographs and articles published in Short Wave Magazine is fully protected and reproduction or imitation in whole or in part is expressly forbidden. All reasonable precautions are taken by Short Wave Magazineto ensure that the advice and data given to our readers is reliable. We cannot however guarantee 35 Novel 3.5MHz Receiver Follow-up it and we cannot accept legal responsibility for it Prices are those current as we goto press. Short Wave Magazine is published monthly for $45 per year by PW Publishing Ltd., Enefco House, The Quay, Poole Dorset BH15 1PP. Second class postage paid at Middlesex, NJ. Postmaster: send address changes to Short Wave Magazine, c/o C & 36 New Marine Beacon Frequencies in C Mailers International Inc., 900 Lincoln Boulevard, PO Box 177, Middlesex, New Jersey, 08846, USA. The USPS the British Isles (United States Postal Service) number for Short Wave Manning Magazine is: 006696. Godfrey G4GLM pw publishing ltd. REGULARS Cover: Soldering might be MODS 47 Airband 59 Long, Medium & Short part of carrying out ,..:,,..,.."" .. 42 Amateur Bands Round -up 6 News modifications to . - .. ,.....,».. 40 Bandscan USA 21 PCB Service your short wave radio, but can you 70 Book Service 38 Propagation guess what this 56 Decode 39 RadioLine chap is doing? 45 DXTV Round -up 11 Rallies I will tell you that he's not working on 3 Editorial 41 Satellite TV News his scanner. emir 11 Grassroots 50 Scanning Send in your ideas, 53 Info in Orbit 3 Services funny or serious, to the Editor and you 72 Index to Advertisers 39 SSB Utility Listening could win a prize! 5 Junior Listener 12 SWM Subscribers' Club Photo credit a., ............-.....,.-.. 3,21 Letters 73 Trading Post Adam Hart-Davia/ 21 Listen With Grandad 64 Watching Brief Science Photo Library. ...GOOD LISTENING TRADING POST COUPON SWM AUG 1992 1 uniden . Scanners by ELECTRONICS EUROPE S.A. 20.000.000 FF RI/LIE HEY!) /t!W/iíYB! 11! ri . - , L_ - PIZESIfflEnt Your reasoning Quality. reliability. solidity. from IA'a wide -worldly known brand: I uniden . A proven value for Scanners ' and Citizen Band radios. 'PRESIvtear Your partner \ Present all over the U.K. thanks to exclusive distribution. Complete range available as from July 1992 onwards. ti. m O c °e 5 4' << Q` OQ,'PQJe r cP a° R 5``JP e`cJ+ .PO\ Q\ea50\ 0 ,G 10 aQO A,.\JF OQ "&(.<1;`-.at.Q``\0yo \ Qt,S \e oíe c` oJdC, \<1''ti ó \O Q te l ° x>1 ti'1' \ . P°J oQP `, e x editorial The Letters pages in the July month's Letters will have to be SWM SERVICES issue certainly generated a lot larger than usual to of replies on several of the accomodate them all. I have Subscriptions topics raised. Because of the always maintained that a lively Subscriptions are available at£21 per way in which the magazine is Letters section indicates a prepared - with this Editorial healthy magazine - if the annum to UK addresses £23 in Europe being the last piece to be present maibag is anything to and £25 overseas. Subscription copies prepared - it is not possible to go by Short Wave Magazine are despatched by Accelerated include them in this issue. certainly falls into that Surface Post outside Europe. Airmail However, this means that next category! rates for overseas subscriptions can be quoted on request. Joint subscriptions to both Short Wave Magazine and Practical Wireless are available at£361UK) £391Europe) and £41 (rest of world). letters IF YOU HAVE ANY POINTS OF VIEW THAT Dear Components for SWM Sir Since 1985 I have been a generated, especially if the YOU WANT TO AIR Projects regular, but rather casual, receiver has a limited dynamic PLEASE WRITE TO THE In general all components used in short wave listener using range. EDITOR. IF YOUR LETTER constructing SWM projects are various simple receiver, but I would like to thank two available from a variety of component more latterly a Sony ICF- BRITISH companies for their IS USED YOU WILL 7600DS. extremely helpful, friendly and suppliers. Where special, or difficult RECEIVE A £5 VOUCHER to obtain, components are specified, However, in the last 12 efficient service: Lowe months or so I have been Electronics in Matlock from TO SPEND ON ANY SWM a supplier will be quoted in the article. greatly encourage by your where I recently purchase their The printed circuitboardsfor SWM SERVICE. excellent magazine and have new and absolutely superb projects are available from the SWM spent more time and effort HF-150 - what a gem! - PCB Service. (and money tool) on this nothing was too much for The Editor reserves the I them. hobby. First of all built John right to shorten any Back Numbers and Tweeker's m.w. loop (Jan 1991 Secondly, ERA in Binders SWM), which gave excellent Warrington for their excellent letters for publication but Limited stocks of most issues of SWM results with the ICF-7600DX. I little Microreader, which I have will try not to alter their for the pastfive years are available at then progressed to the even just upgraded with the new 4.1 sense. Letters must be £1.80 each including P&Pto addresses better Hex loop (April 1989) EPROM, this really improves at home and overseas (by surface and made an a.t.u. which also its performance vastly and original and not have was very worthwhile. also provides the facility to mail). been submitted to other With the addition of the decode SITOR/NAVTEX and Binders, each taking one volume excellent C.M. Howes ASL5 AMTOR in addition to the magazines.The views of the new style SWM, are available s.s.b. and c.w. filter (which previously available standard expressed in letters price £5.50 plus£1 P&P for one binder, really cleans up noisy s.s.b. RTTY and c.w. Anyone who published in this £2 P&P for two or more, UK or signals very effectively) and has a Microreader really overseas. Please state the year and the Maplin DXer's Audio should upgrade from the old magazine are not is I 4.1 firmware. volume numberforwhichthe binder Processor had quite a good 3.2 to the necessarily those of Short required. Prices include VAT where set up. Mike Smith Wave Magazine.
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