RadCom August 2013, Vol. 89, No. 8

| August 20, 2013

Cover of August 2013 RadCom - Sir Henry Aubrey-Fletcher Bt JP is shown around the National Radio Centre by RSGB President Dr Bob Whelan, G3PJT on RSGB Centenary Day. Photo: Mike Richards, G4WNC

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Contents RadCom August 2013

News and Reports

  • 6 RSGB Centenary Celebrations
    A full report on the RSGB Centenary Day celebrations at Bletchley Park and Horwood House
  • 9 RSGB Matters
    Including spectrum release news, the G5RP trophy, QSL matters, committee vacancies and newcomers
  • 14 Centenary Construction Competition
    There’s still time to put in an entry – and there are even cash prizes to be won
  • 16 Centenary News
    Where to find G100RSGB next, and getting a certificate in the IOTA Contest
  • 82 Around Your Region
    Club news and planned events around the country


  • 27 Mills on the Air
    News from three groups that participated in May’s successful event
  • 32 RSGB Convention
    Latest news on the Centenary convention in October
  • Getting Started in Digital APRS
    Alec Wood, G8WHR explains the Automatic Packet Reporting System real-time data communication method
  • 70 International Marconi Day 2013
    How the Gordano Amateur Radio Group took part from Flat Holm, by Jim Bryant, M0JWB


  • 34 Riogol DS2002
    Compact 100MHz 2GSPS benchtop digital oscilloscope reviewed by Dave Pick, G3YXM
  • 39 Book Review
    Giles Read, G1MFG looks at two excellent titles from Haynes: the Thunderbirds Agents’ Technical Manual and Raspberry Pi Owners’ Workshop Manual

Technical Features

  • 18 SDR Futures
    Steve Ireland, VK6VZ and Phil Harman, VK6APH take a look at the progress of software defined radio to date, plus a look at what may be around the corner
  • 24 Homebrew
    Developing a local oscillator for the homebrew 70cm transverter project by Eamon Skelton, EI9GQ
  • 30 Data
    Andy Talbot, G4JNT looks at SDR dongles and multiple sound cards
  • 44 EMC
    Dr David Laouder, G0SNO considers the use of software defined radio for analysing and tracking down interference
  • 52 Design Notes
    RF power measurement techniques developed in the 1960s still hold good today, explains Andy Talbot, G4JNT
  • 72 Start Here
    John Welsh, G0NVZ introduces the basics of inductors


  • 87 Advertisers index
  • 22 Antennas, Peter Dodd, G3LDO
  • 65 GHz, Dr John Worsnop, G4BAO
  • 58 HF, Don Field, G3XTT
  • 38 IOTA , Martin Atherton, G3ZAY
  • 56 LF, Dave Pick, G3YXM
  • 78 Propagation, Gwyn Williams, G4KFH
  • 16 QRP, Rev George Dobbs, G3RJV
  • 88 Members’ Ads, Rallies and Events, Silent Keys and Special Event Stations
  • 74 Sport Radio, Steve White, G3ZVW
  • 92 The Last Word
  • 60 VHF/UHF, Richard Staples, G4HGI

Category: RadCom