RadCom August 2015, Vol. 91, No. 8

| July 17, 2015

Cover image: Visitors try out radios on display at Ham Radio, Friedrichshafen. Image: Christa Thoma, copyright Messe Friedrichshafen

News and Reports

6 RSGB Matters
Support Project DX-15, Club of the Year 2015, volunteers needed, Volunteer Spotlight, licence revalidation and other Ofcom news, exam changes for new licence, trophy photo gallery, QSL Matters, congratulations, joiners and rejoiners
11 News
All the amateur radio news
14 New products
The latest new products we’ve heard about this month
82 Around your region
Club news and planned events around the country

Read this edition online

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


16 Mills on the Air 2015
A round-up of experiences in this year’s event by Elaine Richards, G4LFM
20 Top tips when making an insurance claim
Julian Dent of South West Broking examines what you should do, or not do, when claiming on your insurance
22 Using the Kenwood TS-590SG in a major contest
Mark Haynes, M0DXR describes his experiences working single operator two radio (SO2R) in the CQ WPX CW contest
43 Hitched to a Ham
Heather Pritchard looks at the lighter side of being an XYL
55 Big Camp 2015
Six thousand young people join together in activities including amateur radio, writes Michael Jones, 2E0MLJ
60 RSGB Convention and Hamfest
A look forward to the two biggest events of the year
70 The GB3ZW 6m repeater
Dave Brown, GW4NQJ charts the highs and lows of getting a 6m repeater on the air
81 Friedrichshafen 2015
Highlights of the 40th anniversary show by Murray Niman, G6JYB


61 Book review
Propagation and Radio Science plus Radar, Britain’s Shield and the Defeat of the Luftwaffe examined by Giles Read, G1MFG

Technical Features

24 Thermal imaging for the radio amateur
Giles Read, G1MFG looks at the world in a new way
26 A DC regulator for Honda generators
Mike Hall, G3USC tames the ‘battery charge’ output for radio use
32 A battery voltage conditioner for QRP rigs
A simple project by Stuart Wisher, G8CYW to ensure your radio sees 13.8V when operating /p
34 DC to light and beyond
A look at wavelengths from Universe-size to utterly microscopic by Chris Saunders, G4ZCS
40 Design Notes
Andy Talbot, G4JNT looks at an analogue/digital system-on-a-chip, a new 12-bit 10MHz bandwidth VHF-UHF SDR, GPS module changes and a cautionary tale about wideband glitches
44 An integrated homebrew SDR transceiver
Making your own compact, tidy, all-in-one SDR plus linear and ATU by Andrew Churchley, G4EAQ
46 EMC
Performance of ferrite cores and chokes, interference from solar panel optimisers and broadcast stations discussed by Dr David Lauder, G0SNO
48 Moving On
The second half of the look at circular polarisation by John Welsh, G0NVZ
70 Data
Andy Talbot, G4JNT looks at a new beacon mode, PI4

Due to circumstances beyond our control we are unable to include Homebrew this month but it will be back in September.


91 Advertisers’ index
30 Antennas, Peter Dodd, G3LDO
68 GHz, Dr John Worsnop, G4BAO
64 HF, Martin Atherton, G3ZAY
63 LF, Dave Pick, G3YXM
89 Propagation, Gwyn Williams, G4KFH
60 QRP, Rev. George Dobbs, G3RJV
92 Members’ ads, rallies and events, Silent Keys and special event stations
95 RSGB contacts
76 Sport radio, Steve White, G3ZVW
96 The Last Word
66 VHF/UHF, Richard Staples, G4HGI

Category: Front Page News, RadCom, RSGB Notices