{"id":8048,"date":"2013-08-24T15:42:00","date_gmt":"2013-08-24T05:42:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2013\/08\/24\/bitx-build-update-2\/"},"modified":"2025-07-21T23:56:45","modified_gmt":"2025-07-21T13:56:45","slug":"bitx-build-update-2","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2013\/08\/24\/bitx-build-update-2\/","title":{"rendered":"BITX Build: Update #2"},"content":{"rendered":"
<\/a><\/div>\n

Not much progress to report. But I have been thinking about the filter frequency. Here is my latest idea: <\/b>

<\/b> Maybe I’ll build the VFO in the 5 MHz range. This would allow me to use the 9 MHz Yaesu filter (and associated crystals) that Steve Smith sent to me (see above). With this I could be on 75 and 20 meters. <\/b>

<\/b> I could build another filter at 13 MHz and, using the same VFO in the 5 Mhz range, get on our beloved 17 meter band. I kind of like the idea of plug-in filters. <\/b>

<\/b> You can see my ideas for the board layout. I’m thinking of a Doug DeMaw Universal Hartley VFO inside the box shown above. The tuning cap you see is out of an old Heath QF-1 Q Multiplier. It has a very nice reduction drive built into the tuning shaft. It measures 19 to 148 pf. <\/b>
Our book: “SolderSmoke — Global Adventures in Wireless Electronics” http:\/\/soldersmoke.com\/book.htm<\/a> Our coffee mugs, T-Shirts, bumper stickers: http:\/\/www.cafepress.com\/SolderSmoke<\/a> Our Book Store: http:\/\/astore.amazon.com\/contracross-20<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Not much progress to report. But I have been thinking about the filter frequency. Here is my latest idea: Maybe I’ll build the VFO in the 5 MHz range. This would allow me to use the 9 MHz Yaesu filter (and associated crystals) that Steve Smith sent to me (see above). With this I could … Continue reading “BITX Build: Update #2”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":8049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,7,66,68],"tags":[],"class_list":["post-8048","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bitx20","category-demaw-doug","category-farhan","category-india"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8048","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=8048"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8048\/revisions"}],"predecessor-version":[{"id":8050,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8048\/revisions\/8050"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/8049"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=8048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=8048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=8048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}