RadCom March 2014, Vol. 90, No. 3

| February 18, 2014

Cover of March 2014 RadCom - The Lambda Loop horizontally polarised 2m mobile antenna, by G3NAQ

News and Reports

6 RSGB Matters
Including Convention news, Solar PV panel questions, Centenary Award winners, Revalidation, QSL matters, New Members and Congratulations
40 Committee Reports
RSGB Committee chairs report on their 2013 activities ahead of the 2014 AGM
79 News
All the amateur radio news
83 Around Your Region
Club news and planned events around the country

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13 Yaesu FTdx1200
Peter Hart, G3SJX looks at the new mid-range HF and 50MHz transceiver and asks how different it is from the FTdx3000
75 Book Review
All about SWR plus the ARRL’s History of QST


IOTA 50th Conference
This year marks the half-century of this popular awards programme and Roger Balister, G3KMA explains all about the celebratory conference
69 G100RSGB
A final round-up of club reports at the end of a fantastically successful year for our peripatetic commemorative callsign
76 Exam Quiz
So you think you know about amateur radio exams? Steve Hartley, G0FUW poses some questions that you may find tricky to answer…

Technical Features

18 Homebrew
Eamon Skelton, EI9GQ works on the IF section for his LF/MF transceiver project
24 An Introduction to Moonbounce
The second half of the article by John Lemay, G4ZTR and John Regnault, G4SWX looks at the operating issues on this challenging mode
32 Getting Started in… LF
Try our real low frequency band, 136kHz, and its medium frequency sibling, 472kHz, says Dave Pick, G3YXM
48 Moving On
John Welsh, G0NVZ looks at the oft-misunderstood earth image of aerials
54 Design Notes
Driving model control servos and a look at a new GPS module with Andy Talbot, G4JNT
58 The Lambda Loop
Geoffrey Grayer, G3NAQ describes his practical, novel 2m mobile antenna for horizontal polarisation


91 Advertisers index
36 Antennas, Peter Dodd, G3LDO
74 ARDF, John Marriott, RS205838
31 AT V, Dave Mann, G8ADM
66 GHz Bands, Dr John Worsnop, G4BAO
62 HF, Martin Atherton, G3ZAY
23 IOTA , Col McGowen, MM0NDX
92 Members’ Ads, Rallies and Events, Silent Keys, Special Event Stations
82 Propagation, Gwyn Williams, G4KFH
95 RSGB Contacts
72 Sport Radio, Steve White, G3ZVW
96 The Last Word
64 VHF/UHF, Richard Staples, G4HGI

Category: RadCom