Practical Wireless 2012-04.pdf

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ISSN 0141-0857
April 2012 £3.50
ISSN 0141-0857
Microwave Home-Brew
Practical Way
Remembering Steve Ortmayer
G4RAW
In the Shop
Drivers & power amplifiers
Valve & Vintage
Improving the 1.3GHz portable transverter
What Next? What's involved in moving from
What's involved in moving from
a Foundation Licence to an
a Foundation Licence to an
Intermediate Licence.
Intermediate Licence.
Spread the word – save that old
valved set!
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Practical Wireless April 2012
contents
Volume 88. Number 4. Issue 1259. On sale 8th March 2012
16
6 Keylines
Rob G3XFD discusses the first Saturday
operation of GB80PW and some adjustments
he’s made to the main antenna at G3XFD!
7
Radio Waves – Readers’ Letter s
Your chance to air your views and discuss
topics of interest.
12 News
All the latest news and happenings in the
Radio Amateur world.
45 Valve & Vintage
20
Phil Cadman G4JCP – wearing his traditional
brown dust coat mans the ‘shop’ this month
and discusses vintage audio equipment and
topics raised by readers.
16 Improving the 1.3GHz Portable
Transverter
John Cooke GM8OTI – decided that he
should put together an improved portable
station that allowed him to get started in
1.3GHz home-brewing.
50 Low Band v.h.f. Transatlantic
Reception
Our keen v.h.f. specialist author Tim Kirby
G4VXE presents his monthly look at what’s
going on above 30MHz and takes a look at
you reports.
20 A Nip of Gin For Your Antenna?
Ian Dilworth G3WRT discusses the problems
facing us when we’re planning antennas and
then describes a practical Gin pole to help
erect the system of our choice.
26
53 From the Foundation Onwards to
the Intermediate Licence
26 Remembering Steve Ortmayer
G4RAW
In this month’s What Next? Colin Redwood
G6MXL is looking at what is involved in
moving from a Foundation Licence to an
Intermediate Licence.
This month the Rev. George Dobbs G3RJV
remembers a very special Radio Amateur who
is fondly remembered in the PW offices.
60 Drivers & Power Amplifiers
29 The Morse Mode
Harry Leeming G3LLL says “In the last
couple of issues I’ve looked at neutralisation,
so this month I’ll concentrate more on the
power amplifier and driver stages.
This time Roger Cooke G3LDI explains his
humour – and brings you an unusual key
before appealing for volunteers!
36
32 Mixing One to One
64 Special Diamond Jubilee &
Olympic Callsign News!
This time in Technical for the Terrified , Tony
Nailer G4CFY discusses singly balanced
mixers.
This time Carl Mason GW0VSW has news
of special callsigns available for Her Majesty
The Queen’s Diamond Jubilee and the
Olympics.
36 Sound-Cards for SDR
In his DataModes column this month, Mike
Richards G4WNC , explores sound-card
requirements for SDR, after an apology to
Joseph Fourier!
42
23 Rallies
68 Bargain Basement
69 Classified Adverts
70 Traders’ Tables
72 PW Publishing Bookstore
76 Subscriptions
77 Topical Talk
42 Working as a Radio Operator in
the Diplomatic Wireless Service
Part I
Ross Bradshaw G4DTD shares the
experience of working in the Diplomatic
Wireless Service from 1979 until 1993.
Front cover design by Steve Hunt.
53
Editor’s apology: Due to circumstances beyond our control the Baofeng review will not be published.
Copyright © PW PUBLISHING LTD. 2012. Copyright in all drawings, logos, photographs and articles published in Practical Wireless is fully protected and reproduction in whole or part is expressly forbidden. All reasonable precautions are taken by
Practical Wireless to ensure that the advice and data given to our readers are reliable. We cannot however guarantee it and we cannot accept legal responsibility for it. Prices are those current as we go to press.
Published on the second Thursday of each month by PW Publishing Ltd., Arrowsmith Court, Station Approach, Broadstone, Dorset BH18 8PW. Tel: 0845 803 1979. Printed in England by Holbrooks Printers Ltd., Portsmouth P03 5HX. Distributed by
Seymour, 2 East Poultry Avenue, London EC1A 9PT, Tel: 020 7429 4000, Web: http://www.seymour.co.uk. Sole Agents for Australia and New Zealand - Gordon and Gotch (Asia) Ltd.; South Africa - Central News Agency. Subscriptions INLAND £38,
EUROPE £47, REST OF WORLD £57, payable to Practical Wireless, Subscription Department. PW Publishing Ltd., Arrowsmith Court, Station Approach, Broadstone, Dorset BH18 8PW. Tel: 0845 803 1979. Practical Wireless is sold subject to the
following conditions, namely that it shall not, without written consent of the publishers first having been given, be lent, re-sold, hired out or otherwise disposed of by way of trade at more than the recommended selling price shown 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 any publication or advertising, literary or pictorial matter whatsoever. Practical Wireless
is Published monthly for $50 per year by PW Publishing Ltd., Arrowsmith Court, Station Approach, Broadstone, Dorset BH18 8PW, Royal Mail International, c/o Yellowstone International, 87 Burlews Court, Hackensack, NJ 07601. UK Second Class
Postage paid at South Hackensack. Send USA address changes to Royal Mail International, c/o Yellowstone International, 2375 Pratt Boulevard, Elk Grove Village, IL 60007-5937. The USPS (United States Postal Service) number for Practical Wireless
is: 007075.
5
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