RadCom May 2013, Vol. 89, No. 5

| May 14, 2013

Cover of May 2013 RadCom showing David Stansfield, G0EW on Kidsty Pike

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Contents RadCom May 2013

News and Reports

  • 6 RSGB Matters
    Including Club of the Year, NoV clarification, Ofcom consultations, RSGB volunteer vacancies, National Radio Centre news, New Members and Congratulations
  • 10 News
    Amateur radio news
  • 11 RSGB Centenary
    RSGB Centenary year news, including Gx100RSGB, Anniversary Day and the Centenary Dinner
  • 21 VHF NFD
    John Simkins, G8IYS, asks how did the teams get on in 2012?
  • 80 Around Your Region
    Club news and planned events around the country
  • 91 Contacts
    All the contact information for the RSGB, including Committees and Regional Managers


  • 14 Activating Wainwrights
    David Stansfield, G0EW takes amateur radio out in the Lake District
  • 30 Getting started in… Sporadic-E
    Jim Bacon, G3YLA explains more about one of the more exotic modes available to radio amateurs
  • 42 History of Optical Communications
    It’s 50 years since the first amateur laser QSO and Stuart Wisher, G8CYWW tells the story
  • 68 SOS Radio Week
    How some clubs raised funds for the RNLI by getting on the air

Technical Features

  • 18 Homebrew
    Eamon Skelton, EI9GQ makes AGC generator circuits for the TL026 IF amplifier
  • 41 Waveguide filter sweeper
    Using micorwave junkbox parts, Mark Atherton, ZL3JVX extends the frequency range of a spectrum analyser and frequency sweeper
  • 52 Start Here
    John Welsh, G0NVZ looks at the operation of of coherers
  • 60 Design Notes
    Andy Talbot, G4JNT looks at efficient power amplifiers


  • 87 Advertisers’ index
  • 26 Antennas, Peter Dodd, G3LDO
  • 73 ARDF, Bob Titterington, G3ORY
  • 17 AT V, Roy Powers, G8CKN
  • 62 GHz Bands, Dr John Worsnop, G4BAO
  • 54 HF, Don Field, G3XTT
  • 88 Members’ Ads, Rallies and Events, Silent Keys, Special Event Stations
  • 78 Propagation, Gwyn Williams, G4KFH
  • 74 Sport Radio, Steve White, G3ZVW
  • 92 The Last Word
  • 56 VHF/UHF, Richard Staples, G4HGI

Category: RadCom