RadCom February 2013, Vol. 89, No. 2

| February 1, 2013

Cover of February 2013 RadCom - Richard Byford, G4MKR, demonstrating amateur radio at the NRC.  Photo: RSGB

RadCom is the Radio Society of Great Britain Members’ magazine and is sent free every month to Members of the Radio Society of Great Britain.

RadCom has the largest amateur radio readership in the UK and is respected throughout the world.

To read this edition online, click the cover or follow this link.

You will need to enter your RSGB Members’ Area login, and have Adobe Flash installed on your computer.

Contents RadCom February 2013

News and Reports

  • 6 News
    News from the world of amateur radio
  • 9 RSGB Matters
    Including commentary on the Band Plans, Society matters, National Club of the Year, elections and appointments, the new RSGB Website, QSL Matters, New Members and Congratulations
  • 12 G100RSGB goes on the air
    Read how RSGB President Dave Wilson, M0OBW opened the year-long special event celebration
  • 14 Honour Roll
    The Society salutes those with unbroken membership of 50 years and more
  • 22 Getting started in… Beacons
    Beacons have been on the air for 50 years – Prof Martin Harrison, G3USF begins an explanation of the hows and whys
  • 34 National Radio Centre
    The NRC has been open for a full year – find out what’s been happening in those twelve exciting months
  • 38 Band Plan 2013
    All the UK amateur bands from 136kHz to 250GHz, including the latest – and sometimes substantial – revisions arising from the IARU Region 1 Conference and other sources
  • 80 Around Your Region
    Club news and planned events around the country


  • 62 FunCube Dongle Pro+
    Mike Richards, G4WNC examines the new and greatly improved FunCube Dongle Pro+ SDR that receives 150kHz to 1.9GHz at remarkably low cost
  • 70 Alpha DX-Jr Antenna
    A lightweight, vertically and horizontally polarised portable 40m to 6m antenna reviewed by Steve Nichols, G0KYA
  • 73 Book Review
    Ian Fleming and SOE’s Operation Postmaster, the RSGB Bound Volume 2012, RadCom CD 2012 and the Pegasus Amateur Radio Call Book CD

Technical Features

  • 18 Homebrew
    Eamon Skelton, EI9GQ turns his attention to crystals and crystal filters
  • 23 Computer SMPSUs
    Mark Atherton, ZL3JVX asks whether a 23A 12V PSU for £10 is too good to be true – his findings may surprise you
  • 52 Transceiver power levelling
    Clem Andrews, G0APM explains his experiments with levelling digimode power spectra
  • 54 Data
    A detailed look at ISCAT by Andy Talbot, G4JNT
  • 44 EMC
    More on emissions from solar photovoltaic systems by Dr David Lauder, G0SNO
  • 66 Design Notes
    Andy Talbot, G4JNT looks at cheap-as-chips DDS modules, a SDR-driven handheld, plus water-cooling LEDS and linears
  • 72 Start Here
    The final part of the Tesla Coil project by John Welsh, G0NVZ


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

Category: RadCom