RadCom June 2014, Vol. 90, No. 6

| May 23, 2014

Cover of June 2014 RadCom - The recent TX6G DXpedition received many plaudits for the standard of operating, read the full story. Image: Hilary Claytonsmith, G4JKS

News and Reports

6 RSGB Matters
Including the new President encouraging Members to get involved, Ofcom plans for two of the GHz bands, the latest on 70cm beacons, volunteer vacancies, the new Regional Managers, QSL Matters and Congratulations
10 Our Changing Hobby
The General Manager answers one Member’s questions on youth in the hobby and what the Society is doing to encourage them
12 News
All the amateur radio news
12 The AGM 2014
Details on the AGM votes, awards and trophies that were presented
84 Around Your Region
Club news and planned events around the country

Read this edition online

You will need your RSGB membership login, follow the link below or click the cover image to your right.


32 Amateur Radio, Philippines-style
Simon Dabbs, G4GFN/DU9AQQ tells how amateur radio helped in the Philippines when typhoon Haiyan struck the islands
57 TX6G—Raivavae—Austral Islands
The recent, highly successful, DXpedition to southern French Polynesia described by one of the participants, Don Beattie, G3BJ
26 Getting started in…
Richard Marshall, G4ERP shows you what you need to know about going mobile in part one of this article
80 Amateur Radio in South Africa
Jeff Harris, G3LWM looks at the differences and similarities in the hobby between the two countries


78 Book Review
The 50th Anniversary IOTA Directory plus a look at covert radio and signals interception with Giles Read, G1MFG

Technical Features

16 Over the horizon at 481THz
Roger Lapthorn, G3XBM explains optical frequency DXing via clear air scattering
20 Modifying surplus 13cm linear amplifiers
A team effort yields excellent low cost power says Stuart Wisher, G8GXW
38 A new design of broadband HF vertical antenna
This second and final part describes the practical design of Martin Ehrenfried, G8JNJ’s novel and successful antenna
44 Homebrew
Mixing and switching for the low bands transceiver by Eamon Skelton, EI9GQ
55 EMC
Dr David Lauder, G0SNO looks at measuring field strength, noise levels and using loops for measurements
72 Design Notes
Andy Talbot, G4JNT talks about third method SSB, smartphone audio interfacing and using a mixer for gain control


91 Advertisers index
36 Antennas, Peter Dodd, G3LDO
48 Data, Andy Talbot, G4JNT
70 GHz, Dr John Worsnop, G4BAO
64 HF, Martin Atherton, G3ZAY
62 LF, Dave Pick, G3YXM
82 Propagation, Gwyn Williams, G4KFH
24 QRP, Rev George Dobbs, G3RJV
92 Members’ Ads, Rallies and Events, Silent Keys and Special Event stations
74 Sport Radio, Steve White, G3ZVW
96 The Last Word
66 VHF/UHF, Richard Staples, G4HGI

Category: RadCom