{"id":7633,"date":"2023-06-14T12:30:00","date_gmt":"2023-06-14T02:30:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2023\/06\/14\/nine-homebrew-transceivers-by-walter-ka4kxx-and-some-qrp-and-qro-rc-planes\/"},"modified":"2025-07-22T18:02:23","modified_gmt":"2025-07-22T08:02:23","slug":"nine-homebrew-transceivers-by-walter-ka4kxx-and-some-qrp-and-qro-rc-planes","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2023\/06\/14\/nine-homebrew-transceivers-by-walter-ka4kxx-and-some-qrp-and-qro-rc-planes\/","title":{"rendered":"Nine Homebrew Transceivers by Walter KA4KXX (and some QRP and QRO RC planes)"},"content":{"rendered":"<\/p>\n
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Our friend Walter KA4KXX in Orlando recently sent us this really cool “family photo” of his homebrew rigs. Be sure to see the key that explains the photo (below) FB Walter. Thanks too for the model airplane pictures. (Click on the images for better viewing.) <\/b><\/span><\/div>\n

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Walter wrote: <\/b><\/span><\/div>\n

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I recently realized that I am now operating nine homebrew transceivers, which would fit nicely in an \u201caerial\u201d photograph, so I grabbed my stepladder and everything did fit well in the frame. <\/span>Six of them come from the BITX side of the family, with #1 and #7 direct conversion and #9 a single conversion superhet but using the NE602.<\/span> <\/span>More basic information is included in the sketch.<\/span><\/b><\/div>\n<\/p>\n
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I tried a Si5351 VFO once in the dual-band rig #4, but by the time I built the QRP Labs kit with so much closely-spaced soldering, and then added sufficient filtering and amplification to properly drive a 50 ohm load, I was exhausted! <\/span><\/o:p><\/span><\/b><\/p>\n

These nine were created during the past eight years, and were preceded by eight more transceivers that I can document, but those have all been disassembled, with many of the parts being used in these later rigs. I build my transceivers to be operated often, and since 20 Meters has been hot lately, for example, my POTA Hunter log shows over 300 CW and SSB contacts in 2023 alone, so rig numbers 7 – 9 have been earning their keep lately.<\/o:p><\/b><\/span><\/p>\n

In summary I have created a lifetime total of seventeen transceivers so far, and although I am nowhere near the fifty-plus tally of Pete N6QW, I did spend a lot of years instead homebrewing many radio-controlled model airplanes of my own <\/span>design.<\/span> <\/span>Two photos show one example that I flew in the 2011 Blue Max Scale R\/C Contest at the Fantasy of Flight Museum in Polk City, Florida against some stiff QRO competition.<\/span><\/b><\/p>\n

\u2014Walter KA4KXX<\/o:p><\/b><\/span><\/p>\n<\/div>\n

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Our friend Walter KA4KXX in Orlando recently sent us this really cool “family photo” of his homebrew rigs. Be sure to see the key that explains the photo (below) FB Walter. Thanks too for the model airplane pictures. (Click on the images for better viewing.) Walter wrote: I recently realized that I am now operating … Continue reading “Nine Homebrew Transceivers by Walter KA4KXX (and some QRP and QRO RC planes)”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":7634,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89,28,116,35,41,61,57],"tags":[],"class_list":["post-7633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aircraft","category-bitx20","category-cw","category-direct-conversion","category-juliano-pete","category-si5351","category-superhet-receivers"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7633","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=7633"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7633\/revisions"}],"predecessor-version":[{"id":7638,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7633\/revisions\/7638"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/7634"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=7633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=7633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=7633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}