{"id":9997,"date":"2014-04-25T13:11:00","date_gmt":"2014-04-25T13:11:00","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=9997"},"modified":"2022-05-19T10:54:22","modified_gmt":"2022-05-19T09:54:22","slug":"radcom-may-2014-vol-90-5","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/radcom\/2014\/04\/25\/radcom-may-2014-vol-90-5\/","title":{"rendered":"RadCom May 2014, Vol. 90, No. 5"},"content":{"rendered":"<blockquote>\n<h4><strong>THIS EDITION IS TEMPORARILY UNAVAILABLE ONLINE<\/strong><\/h4>\n<h4>We apologise for any disappointment<\/h4>\n<h4>This edition is currently being converted to our HTML5 online viewer, which will bring enhanced readability, download speed and picture quality<\/h4>\n<\/blockquote>\n<p><a href=\"#5449\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6156 alignright\" title=\"Click the cover to read RadCom online\" alt=\"Cover of May 2014 RadCom - G8LES in his extraordinarily well-equipped ATV shack. Image: Courtesy of Create Media Partners\" src=\"https:\/\/thersgb.org\/images\/radcom\/covers\/2014\/May-2014.png\" width=\"198\" height=\"280\" \/><\/a><\/p>\n<h2>News and Reports<\/h2>\n<p><strong>6 RSGB Matters and News<\/strong><br \/>\nIncluding the new Construction Competition, extra opening days plus a WS19 for the NRC, important changes at 13cm and 9cm plus QSL and other news<br \/>\n<strong>70 Keeping up to date<\/strong><br \/>\nHow did you do in our quiz?<br \/>\n<strong>82 Around Your Region<\/strong><br \/>\nClub news and planned events around the country<\/p>\n<h2>Read this edition online<\/h2>\n<p>You will need your RSGB membership login, follow the link below or click the cover image to your right.<\/p>\n<ul>\n<li><a href=\"#5449\" target=\"_blank\" rel=\"noopener\">RadCom May 2014, Vol. 90, No. 5<\/a><\/li>\n<\/ul>\n<h2>Reviews<\/h2>\n<p><strong>24 Crazy Daisy<\/strong><br \/>\nAn unconventionally shaped magnetic loop antenna that takes just minutes to erect and enables an amateur with little space to get on the air, writes Steve Nichols, G0KYA<br \/>\n<strong>59 Book Review<\/strong><br \/>\nTwo excellent antenna books reviewed by Giles Read, G1MFG<br \/>\n<strong>76 Rock-Mite QRP transceiver<\/strong><br \/>\nRon Stone, GW3YDX reviews a neat 40m crystal controlled radio kit designed by Small Wonder Labs<\/p>\n<h2>Features<\/h2>\n<p><strong>31 Insurance<\/strong><br \/>\nInsurance is paramount in many people\u2019s minds right now thanks to the winter floods and Julian Dent of South West Broking answers some common questions<br \/>\n<strong>57 Youngsters on the Air<\/strong><br \/>\nRSGB Training and Education Committee chairman Steve Hartley, G0FUW profiles the young RSGB Members and the Team Leader chosen for the YOTA Summer Camp in Finland<br \/>\n<strong>68 British Wireless for the Blind Fund<\/strong><br \/>\nFrances Fielding of BWFB explains the Fund\u2019s history and looks at the equipment it has provided over the years from the first crystal sets to the latest internet radio device<\/p>\n<h2>Technical Features<\/h2>\n<p><strong>13 A new design of broadband HF vertical antenna (part 1 of 2)<\/strong><br \/>\nMartin Ehrenfried, G8JNJ describes the background and development of a new type of efficient, omnidirectional broadband vertical antenna that requires no tuner<br \/>\n<strong>18 Homebrew<\/strong><br \/>\nEamon Skelton, EI9GQ works on the RF power amplifier for his LF\/MF transceiver project<br \/>\n<strong>27 Tooling up the TS-50 for CW<\/strong><br \/>\nRetrofitting a better crystal filter can greatly improve the performance of this venerable radio, as Gary Cobb, G3TMG explains<br \/>\n<strong>32 Getting started in test equipment<\/strong><br \/>\nDave Pick, G3YXM looks at the different kinds of test equipment likely to be useful around the amateur shack<br \/>\n<strong>40 Push pull amplifiers<\/strong><br \/>\nA detailed look at series and parallel output configurations and the influence of harmonics by Paul Brooking, G4SHH<br \/>\n<strong>48 Moving On<\/strong><br \/>\nJohn Welsh, G0NVZ explains the electrochemistry of the lead-acid battery<br \/>\n<strong>56 Design Notes<\/strong><br \/>\nControlling a direct digital synthesizer and a novel way of adding FM to a microwave transmitter by phase modulating the reference frequency, all explained by Andy Talbot, G4JNT<\/p>\n<h2>Regulars<\/h2>\n<p>91 Advertisers&#8217; index<br \/>\n36 Antennas, Peter Dodd, G3LDO<br \/>\n74 ARDF, Bob Titterington, G3ORY<br \/>\n30 ATV, Dave Mann, G8ADM<br \/>\n66 GHz Bands, Dr John Worsnop, G4BAO<br \/>\n62 HF, Martin Atherton, G3ZAY<br \/>\n22 IOTA , Col McGowan, MM0NDX<br \/>\n92 Members\u2019 Ads, Rallies and Events, Silent Keys, Special Event Stations<br \/>\n78 Propagation, Gwyn Williams, G4KFH<br \/>\n79 RSGB Contacts<br \/>\n72 Sport Radio, Steve White, G3ZVW<br \/>\n96 The Last Word<br \/>\n64 VHF\/UHF, Richard Staples, G4HGI<\/p>\n","protected":false},"excerpt":{"rendered":"<p>THIS EDITION IS TEMPORARILY UNAVAILABLE ONLINE We apologise for any disappointment This edition is currently being converted to our HTML5 online viewer, which will bring enhanced readability, download speed and picture quality News and Reports 6 RSGB Matters and News Including the new Construction Competition, extra opening days plus a WS19 for the NRC, important [&hellip;]<\/p>\n","protected":false},"author":41,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-9997","post","type-post","status-publish","format-standard","hentry","category-radcom"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/9997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/users\/41"}],"replies":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/comments?post=9997"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/9997\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=9997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=9997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=9997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}