{"id":1172,"date":"2013-08-28T10:38:00","date_gmt":"2013-08-28T00:38:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2013\/08\/28\/bitx-build-updat-4-vfo-stability\/"},"modified":"2013-08-28T10:38:00","modified_gmt":"2013-08-28T00:38:00","slug":"bitx-build-updat-4-vfo-stability","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2013\/08\/28\/bitx-build-updat-4-vfo-stability\/","title":{"rendered":"BITX Build Updat #4   VFO Stability"},"content":{"rendered":"<p><strong>I wasn&#8217;t quite satisfied with the long-term stability of my VFO. It seemed like it was drifting about 70 Hz per hour, even after the initial warm-up period. So, all out of Q-Dope, I went to the local pharmacy in search of clear nail-polish. (My family was making fun of me.) I got home and applied several coats of &#8220;Sally Hansen No Chip Top Coat Vernis de Protection.&#8221; I let it dry a bit, then started watching the frequency counter. At first results were disappointing. Drift continued. Now it seemed to be drifting up! I cracked the books. EMRFD has a good chapter on temperature compensation of VFOs, but the process seemed painful. I wasn&#8217;t looking forward to it. <\/strong><br \/> <strong><\/strong><br \/> <strong>I left the VFO on when I went to work, noting the freq as I departed. Ten hours later I returned, and was delighted to find the frequency almost exactly where I left it! It may have taken a while for the nail polish to completely dry.<\/strong> <strong> I&#8217;ll leave it running again today to see how it does.<\/strong> <\/p>\n<p> Our book: &#8220;SolderSmoke &#8212; Global Adventures in Wireless Electronics&#8221; <a href=\"http:\/\/soldersmoke.com\/book.htm\">http:\/\/soldersmoke.com\/book.htm<\/a> Our coffee mugs, T-Shirts, bumper stickers: <a href=\"http:\/\/www.cafepress.com\/SolderSmoke\">http:\/\/www.cafepress.com\/SolderSmoke<\/a> Our Book Store: <a href=\"http:\/\/astore.amazon.com\/contracross-20\">http:\/\/astore.amazon.com\/contracross-20<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I wasn&#8217;t quite satisfied with the long-term stability of my VFO. It seemed like it was drifting about 70 Hz per hour, even after the initial warm-up period. So, all out of Q-Dope, I went to the local pharmacy in search of clear nail-polish. (My family was making fun of me.) I got home and &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2013\/08\/28\/bitx-build-updat-4-vfo-stability\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;BITX Build Updat #4   VFO Stability&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-1172","post","type-post","status-publish","format-standard","hentry","category-bitx20"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1172","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=1172"}],"version-history":[{"count":0,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1172\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=1172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=1172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=1172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}