RadCom October 2014, Vol. 90, No. 10

| September 22, 2014

Cover of October 2014 RadCom - Cover image: The new RSGB Radio Communication Handbook 2015

News and Reports

6 RSGB Matters
Bringing new blood into the hobby, RSGB Half Year Results, Ofcom Press Release, Promoting Amateur Radio Working Group, RSGB Communication Manager, Legacy Fund Projects, Club Relay Delayed, RSGB Youth Committee, QSL Matters and Congratulations
12 News
All the amateur radio news including World War One lectures, UK 6m Group AGM and news from Bletchley Park
56 New Products
Exciting new amateur radio items we’ve heard about this month
83 Around Your Region
Club news and planned events around the country

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14 IOTA 50th Anniversary Convention
A report on this international meeting by Roger Balister, G3KMA
32 RSGB Convention
Final details and programme for this major event in the amateur radio calendar
38 National Hamfest
A look at some of the highlights and new products on show


15 FlexRadio FLEX-6700 and Apache Labs ANAN-100D
Peter Hart, G3SJX looks at these fully-featured and high performing SDR transceivers at the top end of a growing range of models
43 FlexRadio FLEX-6300
Mike Richards, G4WNC looks at the junior member of the FLEX-6000 Signature range
71 Book Review
Giles Read, G1MFG delves into the latest version of the RSGB Radio Communication Handbook 2015

Technical Features

24 Getting started in… the GB2RS propagation forecasts
Propagation Studies Committee chairman, Steve Nichols, G0KYA explains what the GB2RS propagation forecasts are showing the amateur and how best to use that information
40 EMC
Dr David Lauder, G0SNO looks at the electrical safety and EMC characteristics of a number of phone chargers
55 Data
Andy Talbot, G4JNT continues his look at spread spectrum and discusses where it is useful
58 Homebrew
Measuring RF power from nanowatts to kilowatts by Eamon Skelton, EI9GQ
70 Technical Correspondence
Harry Weston, M0SOP revisits G3LAA’s article on bandwidth, Q and resonance
72 Design Notes
Andy Talbot, G4JNT has a mixed bag including stepper motor control and a handy keypad
81 Tropospheric Ducts, part one
Dr Marcus C. Walden, G0IJZ discusses how a tropospheric duct presents an opportunity for extended communication range at VHF, UHF and microwave frequencies


91 Advertisers’ index
36 Antennas, Peter Dodd, G3LDO
68 GHz, Dr John Worsnop, G4BAO
64 HF, Martin Atherton, G3ZAY
63 LF, Dave Pick, G3YXM
95 Propagation, Gwyn Williams, G4KFH
78 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: Front Page News, RadCom