{"id":11673,"date":"2014-12-22T10:11:33","date_gmt":"2014-12-22T10:11:33","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=11673"},"modified":"2022-05-19T10:50:39","modified_gmt":"2022-05-19T09:50:39","slug":"radcom-january-2015-vol-91-1","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/radcom\/2014\/12\/22\/radcom-january-2015-vol-91-1\/","title":{"rendered":"RadCom January 2015, Vol. 91, No. 1"},"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=\"#5537\" 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\/January-2015.png\" alt=\"Cover of January 2015 RadCom - Cover image: The Yaesu FTM-400DE dual band, dual mode mobile. Photo courtesy of G4WNC\" width=\"200\" height=\"283\" \/><\/a><\/p>\n<h2>News and Reports<\/h2>\n<p><strong>6 RSGB Matters<\/strong><br \/>\nIncluding recognising and encouraging volunteers, Arkwright Trust award, Youth Committee chairman, volunteer and committee spotlight, British Science Week, congratulations, joiners and rejoiners<br \/>\n<strong>13 News<\/strong><br \/>\nAll the amateur radio news<br \/>\n<strong>58 New Products<\/strong><br \/>\nThe latest news from the amateur market<br \/>\n<strong>68 VHF NFD<\/strong><br \/>\nJohn Simkins, G8IYS presents the results and highlights of this flagship RSGB contest<br \/>\n<strong>84 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=\"#5537\" target=\"_blank\" rel=\"noopener\">RadCom January 2015, Vol. 91, No. 1<\/a><\/li>\n<\/ul>\n<h2>Reviews<\/h2>\n<p><strong>16 Yaesu FTM-400DE dual band, dual mode mobile<\/strong><br \/>\nMike Richards, G4WNC looks at the technology behind the Yaesu System Fusion and Graham Coomber, G0NBI tries the radio on the air<br \/>\n<strong>59 Book review<\/strong><br \/>\nTwo great value non-radio books enjoyed by Giles Read, G1MFG plus the top three books from 2014<\/p>\n<h2>Features<\/h2>\n<p><strong>26 On Great Blasket for IOTA 2014<\/strong><br \/>\nSe\u00e1n Donelan, EI4GK reports on the PL DX Group\u2019s trip to the island for the 2014 IOTA contest<br \/>\n<strong>30 Getting started in&#8230; software defined radio (SDR)<\/strong><br \/>\nMike Richards, G4WNC describes the technology and how it can enhance your radio activities<br \/>\n<strong>44 JOTA 2014<\/strong><br \/>\nScouts and Guides around the world took part in Jamboree on the Air and Elaine Richards, G4LFM presents the reports from several groups, including<br \/>\nthe Lithuanian Scouts<\/p>\n<h2>Technical Features<\/h2>\n<p><strong>20 Modern frequency synthesisers<\/strong><br \/>\nBased on his RSGB Convention talk, Andy Talbot, G4JNT explains the key concepts and architectures<br \/>\n<strong>40 Homebrew<\/strong><br \/>\nDesigning and building bridges for RF impedance measurement by Eamon Skelton, EI9GQ<br \/>\n<strong>56 Moving On<\/strong><br \/>\nJohn Welsh, G0NVZ looks at the very large and very small numbers we use in radio and electronics<br \/>\n<strong>76 Design Notes<\/strong><br \/>\nAndy Talbot, G4JNT looks at high performance receivers, an ideal bridge rectifier and an RF switch for low frequencies<br \/>\n<strong>78 A parallel filter architecture for flexible IF processing<\/strong><br \/>\nDr Paul Darlington, M0XPD questions why you would switch IF filters when you can switch IF frequency instead<\/p>\n<h2>Regulars<\/h2>\n<p>91 Advertisers index<br \/>\n36 Antennas, Peter Dodd, G3LDO<br \/>\n74 ARDF, Bob Titterington, G3ORY<br \/>\n54 AT V, Dave Mann, G8ADM<br \/>\n66 GHz Bands, Dr John Worsnop, G4BAO<br \/>\n62 HF, Martin Atherton, G3ZAY<br \/>\n94 Members\u2019 Ads, Rallies and Events, Silent Keys and Special Event stations<br \/>\n93 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 recognising and encouraging volunteers, Arkwright Trust award, Youth Committee chairman, volunteer and committee spotlight, British Science [&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-11673","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\/11673","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=11673"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/11673\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=11673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=11673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=11673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}