practical wireless số 2010 08

NOW IN ITS 78th YEAR! August 2010 £3.50 ISSN 0141-0857 Pracc Way lty r e i t Grg Ds G3RJV roucng   Wrl  VHF by T Krby G4VXE Emrgng T nloy t Crs Lr G4HCL Win A Tennamast Telescopic Mast Worth £460! T c r t T fi e lng  t D M r Lightning & Insurance! [...]... E-mail mm0dyx@supanet.com Website www.gdarc.org.uk/ 12 Practical Wireless, August 2010 Free Competition! Win A Tennamast Adaptamast Worth £460! You’ve read the Part 1 Competition Page in the July PW – Now it’s time to enter the competition! You could win a Tennamast Adaptamast (worth £460 – delivered straight to your door if you live in the UK!) Practical Wireless and Tennamast (Scotland) Ltd., have teamed... up AM, DSB, & SSB transmitters PCB & hardware kit £28.00 Ready Built £52.50 SPECTRUM COMMUNICATIONS 12 WEATHERBURY WAY, DORCHESTER, DORSET DT1 2EF 30 Tel & Fax 01305 262250 Practical Wireless, August 2010 Please mention Practical Wireless when replying to advertisements POUNDBURY 4 METRE SSB TRANSCEIVER PROJECT This comprises six parts 1 POUNDBURY (ver2) 9MHz SSB TX GENERATOR & RX IF Speech processor... (40-6M) PL259 fitting, (Brilliant antenna HF to UHF with changeable coils) £79.95 Moonraker Head Office & Mail Order Cranfield Road, Woburn Sands Bucks MK17 8UR Tel: 01 908 281705 Practical Wireless, August 2010 HB9CV Brilliant 2 element beams … ideal for portable use HB9-70 70cm (Boom 12”) £24.95 HB9-2 2 metre (Boom 20”) .£29.95 HB9-4 4 metre (Boom 23”) .£39.95 HB9-6 6... I’m sure there’ll be some interesting tales told! n (‘field mills’) to warn players of an impending storm The 20 Practical Wireless, August 2010 Feature Scared of making your own p.c.b.s? Try this method! Circuit boards without Etching C olin Wilkinson G0NQE describes his method of making practical printed circuit type boards without the need for ‘messy etching’ My ideas may sound like a bit of a tall... will be disqualified The Editor’s decision is final and no correspondence will be entered into A u Practical Wireless, August 2010 g u s A Te t i C d n ss o ap na u m t m e p a a P e m s a ti a t r ti s t o t 2 n Manufacturers of radio communication antennas and associated products SALES LINE 01 908 281705 E-mail: sales@moonraker.eu Web: www.moonraker.eu Hand-helds Hand-helds Alinco DJ-G7 Great... £469.95 FSK AFSK, 1-100 Watts PEP full featured radio with more flexibility than virtually any other transceiver on the market FLEX-5000A-ATU same as above but with built in ATU £2795.95 Practical Wireless, August 2010 Check on-line for all updates, new products and special offers Hand-helds LOOP ANTENNAS MFJ-1788X £469.95 Frequency 40-15m, Size 1m, Power 150W, Auto band selection, Built-in... Icom Working at Icom has been brilliant I have had some fantastic experiences and made some great friends along the way.” Phil’s last day at Icom was on the 25th June 25th 2010 Everyone wished him well in his new ventures Practical Wireless Author Launches Music Album! een PW author Geoff Cottrell G3XGC contacted Newsdesk with some musical news! He reports, “Some great news! Paul Dunmall and I have great... 1500W high power roller tuner £389.95 MFJ-976 1.8-30MHz 1500W balanced line tuner with X-needle SWR/WATT £469.95 Telescopic Masts (aluminium/fibreglass opt) ALL Antenna Tuners Practical Wireless, August 2010 Please check with the organisers that the rally is ‘on’ before leaving home Send all your rally info to rallies Radio rallies are held throughout the UK They’re hard work to organise... the Horncastle Youth Centre, Willow Road, Horncastle, Lincolnshire LN9 6DZ Admission will be £1.50 and there will be catering and facilities for the disabled Tony G3ZPU Tel: 01507 527835 Practical Wireless, August 2010 July 31st/August 1st The AMSAT-UK Colloquium The AMSAT-UK International Space Colloquium will be held at the Holiday Inn Hotel, Egerton Road, Guildford, GU2 7XZ You can meet Amateur... combustion of air in the lightning strike path and the equally rapid Alan Ford VK2DRR lives in part of the world where lightning can be quite spectacular – and dangerous for radio enthusiasts! 18 Practical Wireless, August 2010 replacement of air in the resulting Fig 1: The powerful air currents in the CumuloPositive charge Nimbus cloud cause the base of the cloud to take vacuum ‘Anvi’ on a strong negative . x0 y0 w1 h1" alt="" Practical Wireless August 2010 Volume 86. Number 8. Issue 1239. On sale 8 July 2010 Practical Wireless, August 2010 5 Copyright © PW PUBLISHING LTD. 2010. Copyright in all. are! Practical Wireless readers’ letters The Star Letter will receive a voucher worth £20 to spend on items from our Book Store or other services offered by Practical Wireless. Practical Wireless, . £57, payable to Practical Wireless , Subscription Department. PW Publishing Ltd., Arrowsmith Court, Station Approach, Broadstone, Dorset BH18 8PW. Tel: 084 5 803 1979. Practical Wireless is sold