{"id":6362,"date":"2018-07-14T16:36:00","date_gmt":"2018-07-14T06:36:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2018\/07\/14\/homebrew-tuner-for-doublet-antenna\/"},"modified":"2025-07-21T20:48:46","modified_gmt":"2025-07-21T10:48:46","slug":"homebrew-tuner-for-doublet-antenna","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2018\/07\/14\/homebrew-tuner-for-doublet-antenna\/","title":{"rendered":"Homebrew Tuner for Doublet Antenna"},"content":{"rendered":"
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For now, I’ve put the Moxon project on the back burner. I will take it up again once Old Sol starts showing some spots. In its place a 135 foot doublet is going up. I got at a hamfest a while back. (It is the only HF antenna that I ever bought!) It is the SPI-RO Manufacturing Company’s Model A-10. It came with 100 feet of 450 ohm window line. It will be up on the roof soon. <\/b><\/div>\n

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Today I put the tuner on the wall in the car port right outside the shack. I even built a little shelf for the SWR meter (used one of those Whole Food grilling planks!). I put a 25 ohm resistor where the feed line will connect. I was able to tune it up on the two bands I tried: 40 and 17. <\/b><\/div>\n

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There is a smaller coil inside the big one — the smaller coil resonates with the lower variable cap. <\/b><\/div>\n

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You can see all the homebrew rigs in the background — waiting patiently for the antenna. <\/b><\/div>\n

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I actually built the tuner back in 2012, but never used it. Description here: <\/b><\/div>\n

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https:\/\/soldersmoke.blogspot.com\/2012\/01\/2012-off-to-good-start-balanced-atu.html<\/a><\/b><\/div>\n
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I will try to provide a schematic and more details soon. <\/b><\/div>\n

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For now, I’ve put the Moxon project on the back burner. I will take it up again once Old Sol starts showing some spots. In its place a 135 foot doublet is going up. I got at a hamfest a while back. (It is the only HF antenna that I ever bought!) It is the … Continue reading “Homebrew Tuner for Doublet Antenna”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":6363,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69],"tags":[],"class_list":["post-6362","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-antennas"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6362","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=6362"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6362\/revisions"}],"predecessor-version":[{"id":6365,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6362\/revisions\/6365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/6363"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=6362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=6362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=6362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}