practical wireless số 2001 01

 [...]... for publication must be clearly marked ‘For Publication’ Editor Practical Wireless, January 2 001 amateur radio rallies Radio rallies are held throughout the UK They’re hard work to organise so visit one soon and support your clubs and organisations 2 001 January 21 The Oldham ARC Rally Contact: Geoff or Mike Telephone: (017 06) 846143 or (017 06) 376454 E-mail: m0aug@thersgb.net or m1cvl@thersgb.net Taking... some useful back-up information The Waters & Stanton 2001UK Radio Communication Equipment Guide costs just £2.95 plus £1.25 P&P and can be ordered direct Waters & Stanton PLC, Spa House, 22 Main Road, Hockley, Essex SS5 4QS Tel: (017 02) 206835 FAX: (017 02) 205843 E-mail: info@wsplc.demon.co.uk Website: www.wsplc.com 12 Practical Wireless, January 2 001 ... stamps to receive your copy UK VERSIONS ICOM IC-756PRO # # Practical Wireless, January 2 001 Haydon comms 27/11/00 15:11 Page 21 Please mention Practical Wireless when replying to advertisements From London SHOWROOM & MAIL ORDER: Unit 1, Thurrock Commercial Park, Purfleet Industrial Estate, London Rd, Nr Aveley, Essex RM15 4YD TEL: 017 08 862524 FAX: 017 08 868441 Open Mon - Fri 8am - 4.30pm Sat 8am - 1.00pm... detail of an experimental direct-conversion receiver, along with suggested component values for the 7MHz Amateur band Practical Wireless, January 2 001 Haydon comms 27/11/00 15:04 Page 19 Please mention Practical Wireless when replying to advertisements C o m m u n i c a t i o n s Mail order: 017 08 862524 Q-TEK COLINEARS “WE’VE SOLD 100S ALL OVER EUROPE” P&P £9.00 # 1.8 - 60MHz HF vertical # 15 foot high... hobby Practical Wireless, January 2 001 Information contained within its pages includes the practical aspects of how to set up a station, techniques to use to hear stations from far away, the codes and jargon that are used, frequencies and frequency bands, receivers, and much, much more Published in paperback form Amateur Radio Explained contains 146 pages and will be available from January 2 001 To... of your subscription period! DON’T MISS OUT - SUBSCRIBE TO PRACTICAL WIRELESS TODAY! £28 £35 £38 £45 (UK) (Europe Air Mail) (Rest Of World Airsaver) (Rest Of World Airmail) To order your subscription, please use the order form on page 74 or call the Credit Card Hotline on (012 02) 659930 and quote PW Subs 1 22 Practical Wireless, January 2 001  G JOE CARR K4IPV... interference would be produced by any particular reader’s version of the project, but it pays to be cautious! We apologise to readers and authors for these errors Rob Mannion G3XFD Practical Wireless, January 2 001 Nevada/PW -01 -2 001 22/11/00 8:38 Page 32 NEVADA ® USED EQUIPMENT YAESU VX-5R All saftey tested and guaranteed for three months Latest Triband Handie 6M/2M/70cm + wideband receiver 500kHz-16MHz... Balun £23.95 MB-6 6:1 Balun £23.95 All prices plus £6.00 P&P per order UNIT 12, CRANFIELD ROAD UNITS, CRANFIELD ROAD WOBURN SANDS, BUCKS MK17 8UR 26 Practical Wireless, January 2 001 Moonraker 20/11/00 10:32 Page 27 Please mention Practical Wireless when replying to advertisements        ... sales@radioworld.co.uk www.radioworld.co.uk E-mail: info@nevada.co.uk www.nevada.co.uk E-mail: g4dvw@cs.com http://ourworld.compuserve.com/homepages/radkit To advertise here call Chris or Eileen on 012 02 659920 Practical Wireless, January 2 001 29  PHIL SELWOOD G0RKF WINDS AN ANTENNA FOR THE 1.8MHz BANDS G method on many modern hatch-back cars, when any bumper or tow-bar... circuit’s notch can be deepened by using an op-amp with a degree of positive feedback, as shown in Fig 11 With values of C1 = 0.1µF, C2 = 0 .01 F, R1 = 100kΩ and R2 = 5.6MΩ, the notch frequency will be 60Hz The frequency can trimmed Practical Wireless, January 2 001  Out C3 C1 R1 C2 R2 slightly by varying R3a, provided that R2 = 100kΩ and R3A+R3B is approximately . 22/11/00 8:27 Page 3 practicalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwireles features January EDITORIAL OFFICES Practical Wireless Arrowsmith. number for Practical Wireless is: 007075. info author January page 72 page 13 ticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelessprac page. be Practical we’re always pleased to hear from readers with ideas - so how about it? practicalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirelesspracticalwirel ●