{"id":10382,"date":"2014-06-20T10:34:59","date_gmt":"2014-06-20T10:34:59","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=10382"},"modified":"2022-05-19T10:53:41","modified_gmt":"2022-05-19T09:53:41","slug":"radcom-july-2014-vol-90-7","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/radcom\/2014\/06\/20\/radcom-july-2014-vol-90-7\/","title":{"rendered":"RadCom July 2014, Vol. 90, No. 7"},"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=\"#5451\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6156 alignright\" title=\"Click the cover to read RadCom online\" src=\"https:\/\/thersgb.org\/images\/radcom\/covers\/2014\/July-2014.png\" alt=\"Cover of July 2014 RadCom - New British 144MHz ARDF Champion Andrew Soltysik, G4KWQ receives the 144MHz Salver from RSGB President John Gould, G3WKL. Photo: David Williams\" width=\"198\" height=\"280\" \/><\/a><\/p>\n<h2>News and Reports<\/h2>\n<p><strong>6 RSGB Matters<\/strong><br \/>\nIncluding the opportunity of 146-147MHz, consultations, appointments and vacancies, Club of the Year presentation, Hamvention visitors, QSL matters and congratulations<br \/>\n<strong>10 News<\/strong><br \/>\nAll the amateur radio news<br \/>\n<strong>26 New Products<\/strong><br \/>\nThe latest devices to emerge into the amateur market<br \/>\n<strong>95 RSGB Contacts<\/strong><br \/>\nWho does what, and how to contact them\u2014from the Chairman onwards<br \/>\n<strong>82 Around Your Region<\/strong><br \/>\nOur regular round-up of club diaries and news reports<\/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=\"#5451\" target=\"_blank\" rel=\"noopener\">RadCom July 2014, Vol. 90, No. 7<\/a><\/li>\n<\/ul>\n<h2>Reviews<\/h2>\n<p><strong>24 M0CVO HW-42HP<\/strong><br \/>\nSteve Nichols, G0KYA examines a new 40m to 6m off centre fed dipole<br \/>\n<strong>34 Sienna transceiver kit<\/strong><br \/>\nIt takes a bit over 50 hours to construct this compact 10W HF transceiver, writes Michael Taylor, N7RKC<br \/>\n<strong>59 Book review<\/strong><br \/>\nGiles Read, G1MFG is impressed by <em>Building a Transceiver<\/em> and <em>ARRL Circuit Simulation and Analysis<\/em><\/p>\n<h2>Features<\/h2>\n<p><strong>40 IOTA Convention<\/strong><br \/>\nRoger Balister, G3KMA describes what\u2019s going to happen at IOTA\u2019s 50th birthday celebrations on 4-6 July\u2014and it\u2019s not too late to join in<br \/>\n<strong>47 International Marconi Day<\/strong><br \/>\nStories from four clubs that helped make this year\u2019s International Marconi Day event light up the bands<br \/>\n<strong>55 Mills on the Air<\/strong><br \/>\nWater, wind and tide mills all went on the air for this celebration in May<br \/>\n<strong>60 National Hamfest and RSGB Convention<\/strong><br \/>\nA look ahead to the two big amateur radio events this autumn<br \/>\n<strong>68 Maritime Mobile<\/strong><br \/>\nAndrew Work, PA8NPT\/G8NPT braves the wind and waves to work 70cm from the North Sea<br \/>\n<strong>76 Alpine DXing<\/strong><br \/>\nGoing by ski into the mountains gives a near zero noise level and lovely radio conditions, writes Stephen Warrilow, M0CYT\/VK3SN<\/p>\n<h2>Technical Features<\/h2>\n<p><strong>13 The Sky-Painter<\/strong><br \/>\nIan Thompson, GM0URD describes his highly portable self-supporting 40m dipole antenna system that packs up neatly into the boot of a small car<br \/>\n<strong>18 Homebrew<\/strong><br \/>\nLocal oscillator options for the LF\/MF transceiver by Eamon Skelton, EI9GQ<br \/>\n<strong>27 Getting started in mobile operation<\/strong><br \/>\nThe second and final part of the introductory article by Richard Marshall, G4ERP<br \/>\n<strong>32 Electrolytic capacitor failure<\/strong><br \/>\nA rather dry story by Mark Atherton, ZL3JVX, which investigates a common failure mode and some some equipment as a result<br \/>\n<strong>38 Moving On<\/strong><br \/>\nJohn Welsh, G0NVZ looks at the history of the humble microphone<br \/>\n<strong>42 Red Star ATU<\/strong><br \/>\nA visually striking project with a Soviet space theme by Jos van den Helm, PA1ZP<br \/>\n<strong>56 Design Notes<\/strong><br \/>\nAndy Talbot, G4JNT explains how to drive (coaxial) relays from less than half their rated supply voltage<\/p>\n<h2>Regulars<\/h2>\n<p>91 Advertisers\u2019 index<br \/>\n36 Antennas, Peter Dodd, G3LDO<br \/>\n74 ARDF, Bob Titterington, G3ORY<br \/>\n70 AT V, 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 \/>\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 Including the opportunity of 146-147MHz, consultations, appointments and vacancies, Club of the Year presentation, Hamvention visitors, QSL [&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-10382","post","type-post","status-publish","format-standard","hentry","category-radcom"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/10382","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=10382"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/10382\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=10382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=10382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=10382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}