{"id":7852,"date":"2018-09-13T08:51:00","date_gmt":"2018-09-12T22:51:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2018\/09\/13\/kd4pbjs-pto-turtle-receiver\/"},"modified":"2025-07-21T23:36:44","modified_gmt":"2025-07-21T13:36:44","slug":"kd4pbjs-pto-turtle-receiver","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2018\/09\/13\/kd4pbjs-pto-turtle-receiver\/","title":{"rendered":"KD4PBJ’s PTO “Turtle” Receiver"},"content":{"rendered":"
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Gents,<\/b><\/div>\n

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Here\u2019s my newest creation. <\/b><\/div>\n
It\u2019s a PTO tuned receiver for 40 meters and uses the WA6OTP PTO circuit I built a couple years back. I believe I had sent you a picture of it then. I bought the tuning assembly from him which is the aluminum bracket, acrylic tube fitted with Pem nut, and brass screw. The circuit uses a J310 as oscillator transistor and several bipolar transistors for amplification and buffering. <\/b><\/div>\n

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This feeds a ADE-1 mixer, mounted on a little breakout board I bought from RfBay. <\/b><\/div>\n
Years ago I had good luck building the Rock Bending Receiver from the ARRL handbook, so I took the audio chain from it and incorporated it. It uses a TL072 and a LM 386. <\/b><\/div>\n
As of now I haven\u2019t needed any kind of front end filter, but am working on a 40 meter bandpass filter from Hans Summers that I will put on the input just in case it\u2019s ever needed. <\/b><\/div>\n
I had been looking for an easy enclosure and found this in one of the break rooms at work. An empty Christmas nut tin. <\/b><\/div>\n
The PTO screw goes in and out like a turtle sticking its head out of the shell, plus my 13 year old son Alex\u2019s favorite animal is a turtle. So it goes. <\/b><\/div>\n

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Chris <\/b><\/div>\n
KD4PBJ<\/b><\/div>\n

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Gents, Here\u2019s my newest creation. It\u2019s a PTO tuned receiver for 40 meters and uses the WA6OTP PTO circuit I built a couple years back. I believe I had sent you a picture of it then. I bought the tuning assembly from him which is the aluminum bracket, acrylic tube fitted with Pem nut, and … Continue reading “KD4PBJ’s PTO “Turtle” Receiver”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":7853,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-7852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-direct-conversion"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7852","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=7852"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7852\/revisions"}],"predecessor-version":[{"id":7857,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7852\/revisions\/7857"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/7853"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=7852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=7852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=7852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}