{"id":4289,"date":"2022-08-01T12:07:00","date_gmt":"2022-08-01T02:07:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2022\/08\/01\/linear-tuning-in-the-ht-37\/"},"modified":"2025-07-22T18:03:26","modified_gmt":"2025-07-22T08:03:26","slug":"linear-tuning-in-the-ht-37","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2022\/08\/01\/linear-tuning-in-the-ht-37\/","title":{"rendered":"Linear Tuning in the HT-37"},"content":{"rendered":"<\/p>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><a href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2022\/08\/HT3720Dial.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" data-original-height=\"2887\" data-original-width=\"2887\" height=\"400\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2022\/08\/HT3720Dial.jpg\" width=\"400\" \/><\/a><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b>I just kind of like this picture. This is the HT-37 dial that came with the HT-37 VFO assembly I recently bought. Note the retro designation: KILOCYCLES. And note the nice, even, linear spacing of the VFO. This VFO runs 5 -5.5 MHz. The circuit is a series-tuned Clapp. That circuit seems to be one of the secrets of getting linear tuning &#8212; to avoid the common situation of having all the upper frequencies kind of bunched together at the end of the capacitor&#8217;s tuning range. I notice that this circuit was used in the Galaxy V VFO and in the VFO of the Yaesu FT-101, both notably linear in their tuning. <\/b><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I just kind of like this picture. This is the HT-37 dial that came with the HT-37 VFO assembly I recently bought. Note the retro designation: KILOCYCLES. And note the nice, even, linear spacing of the VFO. This VFO runs 5 -5.5 MHz. The circuit is a series-tuned Clapp. That circuit seems to be one &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2022\/08\/01\/linear-tuning-in-the-ht-37\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Linear Tuning in the HT-37&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":4290,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59,53],"tags":[],"class_list":["post-4289","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hallicrafters","category-vfo"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4289","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=4289"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4289\/revisions"}],"predecessor-version":[{"id":4291,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/4289\/revisions\/4291"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/4290"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=4289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=4289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=4289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}