{"id":21174,"date":"2018-12-06T10:57:01","date_gmt":"2018-12-06T10:57:01","guid":{"rendered":"https:\/\/rsgb.org\/main\/?p=21174"},"modified":"2018-12-06T11:00:26","modified_gmt":"2018-12-06T11:00:26","slug":"december-2018-diode-tester-article-correction","status":"publish","type":"post","link":"https:\/\/rsgb.org\/main\/blog\/publications\/downloads\/2018\/12\/06\/december-2018-diode-tester-article-correction\/","title":{"rendered":"December 2018 Diode Tester article correction"},"content":{"rendered":"<p>In the December 2018 edition of <em>RadCom<\/em> we published the Multi-Mode Diode Tester article by Dave Ellis, G4AJY. Unfortunately some gremlins crept into the circuit diagram, meaning that it wouldn\u2019t work as intended if built as shown.<\/p>\n<p>The main problems were the 1M resistor R4 and the labelling of switch Sw1b..<\/p>\n<p>R4 was incorrectly shown as being connected between the +60V rail and the output. Its function is actually to \u2018bleed off\u2019 the 60V rail when the device is switched off, as shown in the corrected diagram below.<\/p>\n<p>The circuit diagram correction also affects the wiring diagram (Figure 4 in the article); ensure you wire Sw1 in accordance with the details shown below. Please also be aware that the PCB layout in the article connects R4 to the 20V position rather than Off; this can be corrected if desired, but does not affect the function to any significant degree.<\/p>\n<p>We apologise to Dave, G4AJY and anyone else who may have been affected by these errors.<\/p>\n<div id=\"attachment_21175\" style=\"width: 517px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-21175\" class=\" wp-image-21175\" src=\"https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod-1024x416.png\" alt=\"Corrected circuit diagram for Diode Tester project published in December 2018\" width=\"507\" height=\"206\" srcset=\"https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod-1024x416.png 1024w, https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod-150x61.png 150w, https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod-300x122.png 300w, https:\/\/rsgb.org\/main\/files\/2018\/12\/Diode_tester_final_mod-768x312.png 768w\" sizes=\"auto, (max-width: 507px) 100vw, 507px\" \/><\/a><p id=\"caption-attachment-21175\" class=\"wp-caption-text\">Corrected circuit diagram for Diode Tester published in December 2018. Click image to embiggen.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In the December 2018 edition of RadCom we published the Multi-Mode Diode Tester article by Dave Ellis, G4AJY. Unfortunately some gremlins crept into the circuit diagram, meaning that it wouldn\u2019t work as intended if built as shown. The main problems were the 1M resistor R4 and the labelling of switch Sw1b.. R4 was incorrectly shown [&hellip;]<\/p>\n","protected":false},"author":20369,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[275],"tags":[],"class_list":["post-21174","post","type-post","status-publish","format-standard","hentry","category-downloads"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/21174","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\/20369"}],"replies":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/comments?post=21174"}],"version-history":[{"count":0,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/posts\/21174\/revisions"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=21174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/categories?post=21174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/tags?post=21174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}