RadCom November 2012, Vol. 88, No. 11

| October 25, 2012

RadCom November 2012 coverRadCom 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.

Members of the RSGB can read the whole of this edition online, click the cover or follow the Members’ Area link.

Please note you will need Adobe Flash to view the online version of RadCom.

Join the RSGB

To gain access to this month’s magazine and a year of back issues on-line, join the RSGB now!

Contents RadCom November 2012

Members log-in is required to read the magazine online

News and Reports

  • 7 RSGB Matters
    Including Society matters, Notice of EGM, Royal Patronage, RSGB Centenary Year events, Regional Manager Elections, QSL matters, New Members and Congratulations
  • 12 News
    All the amateur radio news
  • 44 The Future of Your Society
    A statement by the RSGB Interim Board
  • 45 New Governance Proposals
    The Memorandum of Association, proposed revised version of the Articles of Association of Radio Society of Great Britain and the proposed revised version of the Bylaws of the Radio Society of Great Britain
  • 57 Voting Form
  • 82 Around Your Region
    Club news and planned events around the country


  • 67 Book Review
    Radio Auroras and The Cable come under scrutiny this month

Technical Features

  • 18 Homebrew
    Direct conversion receivers have exceptionally good recovered audio explains Eamon Skelton, EI5GQ
  • 36 The Moxon Claw revisited
    In this second and final part, Phil Harman, VK6APH describes the construction of this novel antenna
  • 40 Start Here
    John Welsh, G0NVZ starts an excursion into the high voltage world of the Tesla coil
  • 42 Design Notes
    More on fractional-N synthesisers by Andy Talbot, G4JNT
  • 70 Data
    Andy Talbot, G4JNT with a new update to WSJT plus reader feedback


  • 14 EME2012
    Sam Jewell, G4DDK reports on the 15th International EME Conference
  • 33 RSGB NFD 2012
    A run-down on this year’s National Field Day by Quin Collier, G3WRR – including how he got his comeuppance for gleefully reporting others’ disasters in earlier years
  • 74 One man’s activation of 10 French IOTAs
    Keith Orchard, G3TTC tells of his month in and around Brittany


  • 95 Advertisers’ Index
  • 30 Antennas, Peter Dodd, G3LDO
  • 79 ARDF, Steve Chalk
  • 16 ATV, Roy Powers, G8CKN
  • 65 GHz Bands, Sam Jewell, G4DDK
  • 60 HF, Don Field, G3XTT
  • 91 Members’ Ads, Rallies and Events, Silent Keys, Special Event Stations
  • 27 Propagation, Gwyn Williams, G4KFH
  • 77 Sport Radio, Steve White, G3ZVW
  • 96 The Last Word
  • 62 VHF/UHF, David Butler, G4ASR

Information for RadCom readers


© 2012 Radio Society of Great Britain. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the Radio Society of Great Britain.

Errors and Omissions

Whilst the Radio Society of Great Britain—the publisher—takes all reasonable care in the production of RadCom, we can accept no responsibility for errors, inaccuracies or omissions contained within the magazine or any subsequent loss arising from any use thereof. Reliance placed on the contents of RadCom is at the reader’s own risk. We urge any reader to take all precautions appropriate to avoid any loss or damage to equipment and ensure the personal safety of themselves and others when using material contained in RadCom. It should be also noted that patent or copyright protection may exist in relation to any items within this magazine. The RSGB does not accept any responsibility for failing to identify any such patents, copyright or any other protection.

Readers are also reminded that the use of radio transmission and reception equipment—including scanning—is subject to licensing and the erection of external aerials may be subject to local authority planning regulations.


Although RSGB staff and the staff of Danby Advertising—its Advertising Agent—take reasonable precautions to protect the interests of readers by ensuring as far as practicable that advertisements in the pages of RadCom are bona fide, the magazine and its publisher, the RSGB, cannot accept any undertaking in respect of claims made by advertisers, whether these advertisements are printed as part of the magazine, or are in the form of inserts. Under no circumstances will the magazine accept liability for non-receipt of goods ordered, late delivery, or faults in manufacture. Legal remedies are available in respect of some of these circumstances, and readers who have complaints should address them to the advertiser or should consult a local Trading Standards Office, a Citizens’ Advice Bureau, or their own solicitors. The publishers make no representation, express or implied, that equipment advertised conforms with any legal requirements of the Electromagnetic Compatibility Regulations 1992. Readers should note that prices advertised may not be accurate due to currency exchange rate fluctuatons, or tax changes.

Category: RadCom