RadCom March 2015, Vol. 91, No. 3

| February 19, 2015


We apologise for any disappointment

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Cover of March 2015 RadCom - Cover image: The Elad FDM-DUO multi-use SDR transceiver. Photo courtesy of G4WNC

News and Reports

6 RSGB Matters
Including how the RSGB represents your interests, committee and volunteer spotlights, AGM details, VDSL interference investigation, QSL matters, congratulations and welcome
12 An open letter to the RSGB from G0VRM
Answered by Board member Steve Hartley, G0FUW
13 News
All the amateur radio news
56 New Products
The latest news from the amateur and technical market
82 Around Your Region
Our regular round-up of club diaries and news reports

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16 Kenwood TS-590SG HF and 50MHz transceiver
Peter Hart, G3SJX is favourably impressed by the updates to the TS-590S
23 Gemini 4
A 250-300W amplifier for 6m and 4m with an integral PSU is put through its paces by Peter Hart, G3SJX
46 Elad FDM-DUO multi use SDR transceiver
Mike Richards, G4WNC looks at the new SDR transceiver that doesn’t have to tie you to a PC
59 Book review
Tales of Fort Bridgewoods enjoyed by Giles Read, G1MFG


44 Youngsters on the Air
Mike Jones, 2E0MLJ reports on some of the events that took place getting youngsters on the air last December
54 The GB2CW Project
A service that helps amateurs practice receiving Morse is looking for more volunteers says Roger Cooke, G3LDI
68 Activating Mauritius
Robert Rawson, M0RCX describes his one-man DXpedition to this lovely island

Technical Features

18 The Raspberry Pi in your shack
Based on the RSGB Convention talk, Mike Richards, G4WNC continues his series with a look at the newest Raspberry Pi and how it makes operating datamodes much quicker
26 Making a 7 or 14MHz mini-quad
Steve Ireland, VK6VZ describes the construction and tuning of an efficient antenna that’s smaller than you would think
38 Homebrew
More work on the 10m transceiver project by Eamon Skelton, EI9GQ
76 Design Notes
Building a 10GHz helical antenna is amongst the ideas discussed this month by Andy Talbot, G4JNT
78 Moving On
John Welsh, G0NVZ describes an RF sniffer box and its uses


91 Advertisers’ index
36 Antennas, Peter Dodd, G3LDO
74 ARDF, Bob Titterington, G3ORY
42 ATV, Dave Mann, G8ADM
66 GHz Bands, Dr John Worsnop, G4BAO
60 HF, Martin Atherton, G3ZAY
92 Members’ Ads, Rallies and Events, Silent Keys, Special Event Stations
95 Propagation, Gwyn Williams, G4KFH
72 Sport Radio, Steve White, G3ZVW
96 The Last Word
64 VHF/UHF, Richard Staples, G4HGI

Category: Front Page News, RadCom, RSGB Notices