CQ-TV 175 Contents
Total Page:16
File Type:pdf, Size:1020Kb
CQ-TV 175 Contents Contents Contents.................................................................................................................1 Committee Contacts...............................................................................................2 Editorial .................................................................................................................4 Post and News........................................................................................................6 CAT’96................................................................................................................17 Rally 96................................................................................................................18 PYE Squared........................................................................................................21 GB3XT Kits & Bits. (Advert)..............................................................................28 Using Gunnmod2 with High Power Diodes ........................................................29 Remote Power Supplies........................................................................................31 Anchor Surplus Ltd. (Advert)..............................................................................33 NE592 vs EL2020 Video Op-Amp Group Test...................................................34 Digital Digest - Even More About MPEG 2........................................................38 In Retrospect ........................................................................................................45 A 12v to 24v DC Transformer.............................................................................46 Circuit Notebook #58...........................................................................................47 Satellite TV News................................................................................................51 A Brief Introduction to PIC Microcontrollers......................................................57 A PIC Programmer ..............................................................................................60 An 8 Channel Audio & Video Selector ...............................................................65 The North to South Wales Demo of Live Fast Scan Amateur TV.......................73 What You See Is What You Get ? .......................................................................76 Pictures from Rally 96..........................................................................................78 A Day on the Mountains......................................................................................79 Squarials for 23cms..............................................................................................83 Severnside Television Group (Advert).................................................................86 Golden Oldie - A Horizontal Aperture Corrector ................................................87 Worthing & District Video Repeater Group (Advert) .........................................89 CAT '96 - Stop Press!! .........................................................................................91 TV on the Air.......................................................................................................92 For Sale................................................................................................................94 Wanted.................................................................................................................96 CQ-TV is produced on a P6 Gateway 2000 PC computer system, using the Word for Windows word processing package. The camera ready artwork is produced on an Hewlet Packard LaserJet 4 printer. Printed by Cramphorn Printers Ltd., 15c Paynes Lane, Rugby © 1996 by the BATC CQ-TV 175 Page 1 Committee Contacts CQ-TV 175 Committee Contacts BATC Chairman Trevor Brown G8CJS Club affairs, Video tape library, Technical queries, especially relating to handbook projects. 14 Stairfoot Close, Adel, Leeds, LS16 8JR. Tel: 01132 670115. E-mail: [email protected] BATC General Secretary Paul Marshall G8MJW General club correspondence and business. Library queries relating to the borrowing or donation of written material. Fern House, Church Road, Harby, Notts., NG23 7ED. Tel: 01522 703348. Email [email protected] BATC Hon. Treasurer Brian Summers G8CQS Enquiries regarding club finances, Donations, and constitutional enquiries. 11 Harefield Road, Uxbridge, Middx, UB8 1PH. Tel: 01895 810144, Mobile 0850 014892 CQTV Magazine Editor Trevor Brown Anything for publication in CQ-TV, Articles, Review items, Advertisements, Letters to the editor, and other material except as below. Photographs for the CQ-TV covers:- - Patrick White, Swyncombe, 8 Kingswood Court, Maidenhead, Berkshire, SL6 1DD, England TV on the Air:- Graham Hankins G8EMX, 11 Cottesbrook Road, Acocks Green, Birmingham, B27 6LE. Tel: 0121 707 4337 Satellite TV News:- Paul Holland G3TZO, Chatterton, Chapel Lane, Threapwood, Nr. Malpas, Cheshire, SY14 7AX. Tel: 01948 770429, Email: [email protected] CQ-TV Advertising Manager: Dave Hemingway, Ivanhoe, Glen Road, Hindhead, Surrey, GU26 6QE. Tel: 01428 604645 CQTV Awards:- Bob Webb G8VBA, 78 Station Road, Rolleston on Dove, Burton on Trent, Staffs., DE13 9AB. Tel: 01283 814582 Page 2 CQ-TV 175 © 1996 by the BATC CQ-TV 175 Committee Contacts Exhibitions Rally 96:- Mike Wooding G6IQM, 5 Ware Orchard, Barby, Nr. Rugby, CV33 8UF. Tel: 01788 890365, Fax: 01788 891883, Mobile: 0860 857434 Email: [email protected] CAT 96:- General arrangements and information about talks to clubs, demonstrations, lectures, etc. Paul Marshall G8MJW - Details above. Club Sales Members Services:- PCB’s, components, camera tubes, accessories, etc. (NOT PUBLICATIONS). Peter Delaney G8KZG, 6 East View Close, Wargrave, Berkshire, RG10 8BJ. Tel: 0118 940 3121 Publications:- Handbooks, Back copies CQTV, and anything related to the supply of BATC publications. Ian Pawson G8IQU, 14 Lilac Avenue, Leicester, LE5 1FN. Tel: 0116 276 9425. E-mail: [email protected] Membership Anything to do with membership, including new applications, queries about new and existing membership, non-receipt of CQ-TV, subscriptions, membership records, data protection act. Dave Lawton G0ANO, ‘Grenehurst’, Pinewood Road, High Wycombe, Bucks., HP12 4DD. Tel: 01494 528899 Club Liaison:- And anything of a political nature, co-ordination of ATV repeater licences. Graham Shirville G3VZV, The Hill Farm, Potsgrove, Milton Keynes, Bucks., MK17 9HF. Tel: 01525 290343. Email [email protected] Contests:- Richard Guttridge G4YTV, Ivy House, Rise Road, Skirlaugh, Hull, HU11 5BH. Tel: 01964 562498 BATC BBS Sysop:- Brian Kelly GW6BWX, 12 Cotswold Way, Risca, Gwent, NP1 6QT. Tel: 01633 614376, BBS: 01633 614765. Email:[email protected] Repeater Liaison:- General enquiries and repeater affiliation. Graham Hankins G8EMX, 11 Cottesbrook Road, Acocks Green, Birmingham, B27 6LE. Tel: 0121 707 4337 © 1996 by the BATC CQ-TV 175 Page 3 Editorial CQ-TV 175 Editorial In CQTV 174 the S.C.A.R.T. ATV group reported the problems of repeater licences. The system of ATV repeater applications being veted by Graham Shirville to ensure a smooth passage through various RSGB committees has broken down. The problem was discussed at committee and it was agreed that I should write to the RSGB president on behalf of the club. This I did in March and am sad to report that other than a post card from Lambda House I have not had a reply and it is now June. The Kent ATV group have also taken the Step of writing to the RSGB president. I have not reproduced their letter. but the problems are on similar lines. On a brighter front I have just seen a copy of the ATV programme broadcast on HTV. Bob and Brian made two amiable subjects and although some sending up of what we do was inevitable, they both managed to put a across the positive side of ATV. Copy for CQTV has been at a record high and some has inevitable not made it into this issue apologies in advance if yours is among it. I have tried to edit it for interest balance and include one or two more pictures, That I hope brighten it up a little. New is golden oldie bit of past works that are no longer in print , for new members who will not have seen these older circuits. Let me know if you like it or have a favourit that you would like to see included.. 96 pages is all that the printer can manage to staple together but we are working on him. The Editorial team is coming together and I hope we are all coming out of overload and into a more creative roll, and that this is reflected in the magazine. The Electronic communication is bearing fruit, and E mail is arriving, as yet we have not had an complete article via the Information Super Highway so there is still a first for someone. The down side was a file from the draughtsman went astray on the Highway and had to be redrawn, His Electronic is reproducing a little pale. but hopefully that will be fixed before we get to the printers. In this issue we have covered the PIC micro as a special topic with an explanation and a programmer and an article that uses on in anger. If you are interested in this subject can I point you at Nigel C Gardners book which comes with an assembler and Simulator, I have also found a bargain source in AC Farnell’s of Leeds who have some at £5.89 as opposed to the usual £19. If you can find a way around there minimum order of £10 for non account customers, If