{"id":12710,"date":"2015-06-19T10:30:22","date_gmt":"2015-06-19T10:30:22","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=12710"},"modified":"2022-05-19T10:47:19","modified_gmt":"2022-05-19T09:47:19","slug":"radcom-july-2015-vol-91-7","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/radcom\/2015\/06\/19\/radcom-july-2015-vol-91-7\/","title":{"rendered":"RadCom July 2015, Vol. 91, 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=\"#5575\" 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\/July-2015.png\" alt=\"Cover image: Assembling the MW0JZE seven-band wide-spaced Hexbeam. 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 \/>\nIncluding a report on Dayton, new Board liaison roles, volunteer spotlight, new SDR receivers at NRC, <em>RadCom Basics<\/em> and <em>RadCom Plus<\/em> news, Contest Committee white paper, Legacy Trust vacancies, 2016 AGM location, Construction Competition, QSL matters, RSGB helping YOTA Italy, congratulations and welcome<br \/>\n<strong>13 News<\/strong><br \/>\nAll the amateur radio news<br \/>\n<strong>45 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=\"#5575\" target=\"_blank\" rel=\"noopener\">RadCom July 2015, Vol. 91, No. 7<\/a><\/li>\n<\/ul>\n<h2>Reviews<\/h2>\n<p><strong>19 SPE Expert 1.3K-FA linear amplifier<\/strong><br \/>\nPeter Hart, G3SJX is impressed by an all-in-one that puts out 1.3kW of solid state power for HF and 6m plus 500W on 4m yet weighs just 9.5kg including PSU and internal auto ATU<br \/>\n<strong>38 MW0JZE seven-band wide-spaced Hexbeam<\/strong><br \/>\nFlexible\u2014in more ways than one\u201440m-6m antenna reviewed by Steve Nichols, G0KYA<br \/>\n<strong>57 Peak test equipment<\/strong><br \/>\nAndy Talbot, G4JNT gets to grips with the Peak Atlas ZEN50 intelligent Zener diode tester and a SOT23 test adapter<br \/>\n<strong>59 Book review<\/strong><br \/>\nGiles Read, G1MFG is intrigued by <em>Second World War Secret Bunkers<\/em> and <em>Churchill\u2019s School for Saboteurs<\/em><\/p>\n<h2>Features<\/h2>\n<p><strong>16 Supporting young people in technology<\/strong><br \/>\nBarry Maxwell and Steve Hartley, G0FUW look at the work of the Radio Communications Foundation and The Arkwright Trust<br \/>\n<strong>33 Project DX15<\/strong><br \/>\nYoung radio amateurs will mount a DXpedition to Wales in July, writes Mike Jones, 2E0MLJ<br \/>\n<strong>36 Operating from Sandy Islet<\/strong><br \/>\nCezar Trifu, VE3LYC shares the story of the first ever IOTA activation of Sandy Islet, OC-294\u2014the last unactivated group in Australia<br \/>\n<strong>46 RSGB Convention<\/strong><br \/>\nA look forward to the 9-11 October RSGB Convention and the latest news on the five lecture streams<br \/>\n<strong>48 International Marconi Day<\/strong><br \/>\nThe 28th annual event took place in April, writes Elaine Richards, G4LFM<br \/>\n<strong>53 British Science Week<\/strong><br \/>\nReports from around the country on how amateur radio clubs demonstrated their magic to the public, young and old<\/p>\n<h2>Technical Features<\/h2>\n<p><strong>25 Homebrew<\/strong><br \/>\nTx\/Rx switching and local oscillators for the 10m transceiver project by Eamon Skelton, EI9GQ<br \/>\n<strong>30 Masts and hoisting systems<\/strong><br \/>\nRobert Dancy, G3JRD explains his method of creating and raising an antenna mast<br \/>\n<strong>34 Moving On<\/strong><br \/>\nThe first of a two-part look at circular polarisation by John Welsh, G0NVZ<br \/>\n<strong>42 An Arduino-based receiver noise figure alignment aid<\/strong><br \/>\nBarry Chambers, G8AGN explains his nanowave optimisation device that also has applications in RF<br \/>\n<strong>76 Design Notes<\/strong><br \/>\nAndy Talbot, G4JNT takes a good look at accurate directional couplers and SWR bridges<br \/>\n<strong>80 Ferrite coupled loop antennas<\/strong><br \/>\nA round-up of experiments with ferrite coupling to loops by Ben Edginton, G0CWT<\/p>\n<h2>Regulars<\/h2>\n<p>91 Advertisers&#8217; index<br \/>\n68 Antennas, Peter Dodd, G3LDO<br \/>\n74 ARDF, Bob Titterington, G3ORY<br \/>\n24 ATV, Dave Mann, G8ADM<br \/>\n66 GHz Bands, Dr John Worsnop, G4BAO<br \/>\n60 HF, Martin Atherton, G3ZAY<br \/>\n93 Members&#8217; Ads, Rallies and Events, Silent Keys, Special Event Stations<br \/>\n92 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 a report on Dayton, new Board liaison roles, volunteer spotlight, new SDR receivers at NRC, RadCom [&hellip;]<\/p>\n","protected":false},"author":41,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[274,30,55],"tags":[],"class_list":["post-12710","post","type-post","status-publish","format-standard","hentry","category-front-page-news","category-radcom","category-rsgb-notices"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/12710","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=12710"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/12710\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=12710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=12710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=12710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}