{"id":12378,"date":"2015-04-22T12:29:10","date_gmt":"2015-04-22T12:29:10","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=12378"},"modified":"2022-05-19T10:48:13","modified_gmt":"2022-05-19T09:48:13","slug":"radcom-may-2015-vol-91-5","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/radcom\/2015\/04\/22\/radcom-may-2015-vol-91-5\/","title":{"rendered":"RadCom May 2015, Vol. 91, 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=\"#5559\" 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\/2015\/May-2015.png\" alt=\"Cover of May 2015 RadCom - Cover image: Force 12 XR6\/XRGC Yagi feed arrangement. Photo by Steve Nichols, G0KYA\" width=\"200\" height=\"283\" \/><\/a><\/p>\n<h2>News and Reports<\/h2>\n<p><strong>6 RSGB Matters<\/strong><br \/>\nRSGB supporting ISS mission, invitation to apply for Legacy funding, Foundation and Intermediate operating abroad, committee and volunteer spotlights, AGM details, new experimental spectrum at 4m, Club of the Year top three revealed, RadCom Plus to launch, President\u2019s review of contesting, new Twitter profile, training news, G3AAT SK, QSL Matters, congratulations and welcome<br \/>\n<strong>13 News<\/strong><br \/>\nAll the amateur radio news<br \/>\n<strong>14 New Products<\/strong><br \/>\nThe latest news from the amateur and technical market<br \/>\n<strong>81 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 Services login, follow the link below or click the cover image to your right.<\/p>\n<ul>\n<li><a href=\"#5559\" target=\"_blank\" rel=\"noopener\">RadCom May 2015, Vol. 91, No. 5<\/a><\/li>\n<\/ul>\n<h2>Reviews<\/h2>\n<p><strong>32 Force 12 XR6\/XR6C Yagi<\/strong><br \/>\nSteve Nichols, G0KYA reports on a new 11 element antenna that covers six bands<br \/>\n<strong>56 Spiderbeam Aerial-51 Model 404-UL<\/strong><br \/>\nUltra-lightweight portable antenna for 40m-6m reviewed by Steve Nichols, G0KYA<br \/>\n<strong>59 Book Review<\/strong><br \/>\nGiles Read, G1MFG enjoys the international flavour of <em>Novel Antennas<\/em> and is amazed by photos and stories of secret Cold War bunkers<\/p>\n<h2>Features<\/h2>\n<p><strong>16 GB50LM<\/strong><br \/>\nSpecial event station at the RSPB reserve at Leighton Moss described by Chris Baker, G4LDS<br \/>\n<strong>46 Thinking Day on the Air<\/strong><br \/>\nGirlguiding celebrates its founder\u2019s birthday each February and we hear from eight special event stations helping with the festivities<br \/>\n<strong>54 STELAR<\/strong><br \/>\nRichard Horton, G3XWH reports the latest news of Science and Technology Through Educational Links with Amateur Radio<br \/>\n<strong>68 Commemorating British Radar<\/strong><br \/>\nGraham Murchie, G4FSG and Brian Leathley-Andrew, G8GMU report from GB8ORE at Bawdsey marking the 80th anniversary of the original radar experiments<\/p>\n<h2>Technical Features<\/h2>\n<p><strong>18 Homebrew<\/strong><br \/>\nTransmit stages and filtering for the 10m transceiver project by Eamon Skelton, EI9GQ<br \/>\n<strong>23 Arduino-based Panadapter<\/strong><br \/>\nBarry Chambers, G8AGN describes his live spectrum and waterfall display that works without a PC<br \/>\n<strong>38 A 23cm Linear Amplifier<\/strong><br \/>\nA surplus transistor, internally matched for a different band, makes a fine 23cm 30W+ linear at low cost writes Stuart Wisher, G8CWY<br \/>\n<strong>42 Single 50 Ohm Feed for a 2-ele Dual Band Quad<\/strong><br \/>\nBob Cox, G3PLP describes his homebrew diplexer to run 10m and 6m antennas on one coax<br \/>\n<strong>44 Moving On<\/strong><br \/>\nThe second and final part of the explanation of baluns by John Welsh, G0NVZ<br \/>\n<strong>76 Design Notes<\/strong><br \/>\nAndy Talbot, G4JNT takes a good look at accurate RF power measurement and takes a further glance at noise<\/p>\n<h2>Regulars<\/h2>\n<p>91 Advertisers&#8217; index<br \/>\n36 Antennas, Peter Dodd, G3LDO<br \/>\n74 ARDF, Vlad Boev, 2E0VLB<br \/>\n34 ATV, Dave Mann, G8ADM<br \/>\n66 GHz Bands, Dr John Worsnop, G4BAO<br \/>\n60 HF, Martin Atherton, G3ZAY<br \/>\n92 Members\u2019 Ads, Rallies and Events, Silent Keys, Special Event Stations<br \/>\n80 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 RSGB supporting ISS mission, invitation to apply for Legacy funding, Foundation and Intermediate operating abroad, committee and [&hellip;]<\/p>\n","protected":false},"author":41,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[274,30],"tags":[],"class_list":["post-12378","post","type-post","status-publish","format-standard","hentry","category-front-page-news","category-radcom"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/12378","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=12378"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/12378\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=12378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=12378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=12378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}