I think of a varactor as a dynamically varying capacitor: as the AC applied to it changes, the capacitance changes – so if this varactor is in a circuit with tuned circuits for input, output and idler, it can double or triple the input at the output.<\/p>\n
I needed to double the 121.5 MHz emergency locator transmitter frequency to 243 MHz so I used the 2N3904 collector junction as the varactor diode.<\/p>\n","protected":false},"excerpt":{"rendered":"
I think of a varactor as a dynamically varying capacitor: as the AC applied to it changes, the capacitance changes – so if this varactor is in a circuit with tuned circuits for input, output and idler, it can double or triple the input at the output. I needed to double the 121.5 MHz emergency <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76,74],"tags":[4691,4690,4689],"class_list":["post-21619","post","type-post","status-publish","format-standard","hentry","category-diodes","category-electronic-components","tag-tuning-diode","tag-varactor","tag-varicap"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/21619","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21619"}],"version-history":[{"count":1,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/21619\/revisions"}],"predecessor-version":[{"id":21620,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/21619\/revisions\/21620"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21619"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21619"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21619"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}