{"id":1981,"date":"2013-12-01T12:42:00","date_gmt":"2013-12-01T01:42:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2013\/12\/01\/11-mhz-if-for-new-bitx-20-40-dual-bander-also-cabinetry-and-socketry\/"},"modified":"2013-12-01T12:42:00","modified_gmt":"2013-12-01T01:42:00","slug":"11-mhz-if-for-new-bitx-20-40-dual-bander-also-cabinetry-and-socketry","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2013\/12\/01\/11-mhz-if-for-new-bitx-20-40-dual-bander-also-cabinetry-and-socketry\/","title":{"rendered":"11 MHz IF for new BITX 20\/40 Dual Bander? Also: Cabinetry and Socketry"},"content":{"rendered":"
I am gathering parts and ideas for a BITX dual bander (20 and 40 meters). I know Farhan used a 10 MHz filter for his <\/strong>“Simple SSB Transceiver.”<\/strong><\/a> But I was thinking of going a bit higher, to 11 MHz. This would allow me to run the VFO from 3.175 to 3.355 for 20 meters, and 3.695 to 3.875 for 40 meters. I’m hoping that I can do this with one single VFO (Farhan used two VFOs), perhaps with a reed relay switching in some additional capacitance for the other band. I’ll also follow Farhan’s lead and switch the Low-Pass and Band-Pass filters with DPDT relays. <\/strong><\/div>\n

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I set up a simple spread sheet and looked at the VFO harmonics to see if any fell within the desired tuning ranges. That looks OK. I have not looked at mixing products between VFO and BFO. <\/strong>What do you folks think? Would the 11 MHz IF for these bands work? Or are there evil birdies lurking in my future?<\/strong><\/div>\n

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I’ve gone ahead and bought another wood box for the new rig (I didn’t even have to suffer through a second visit to the crafts store — <\/strong>they are available on Amazon<\/strong><\/a>). I also got a roll of copper sheeting at Home Depot. This time I will prepare the box first, lining the inside with copper and preparing all the “socketry” (George Dobbs’ word) before putting the PC board in.<\/strong> <\/div>\n
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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":"

I am gathering parts and ideas for a BITX dual bander (20 and 40 meters). I know Farhan used a 10 MHz filter for his “Simple SSB Transceiver.” But I was thinking of going a bit higher, to 11 MHz. This would allow me to run the VFO from 3.175 to 3.355 for 20 meters, … Continue reading “11 MHz IF for new BITX 20\/40 Dual Bander? Also: Cabinetry and Socketry”<\/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":[28,146,66,23],"tags":[],"class_list":["post-1981","post","type-post","status-publish","format-standard","hentry","category-bitx20","category-dobbs-george","category-farhan","category-ssb"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1981","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=1981"}],"version-history":[{"count":0,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1981\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=1981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=1981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=1981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}