{"id":7324,"date":"2008-07-10T03:53:00","date_gmt":"2008-07-09T17:53:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2008\/07\/10\/my-beacon-mept-circuit\/"},"modified":"2025-07-21T22:43:50","modified_gmt":"2025-07-21T12:43:50","slug":"my-beacon-mept-circuit","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2008\/07\/10\/my-beacon-mept-circuit\/","title":{"rendered":"My Beacon (MEPT) Circuit"},"content":{"rendered":"<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgqRmkKPCIJPfASztcE4VJ1Auh2HW10wSwSYDHJ-Z1L0rLGSKz-dq3R6i_O_qKgAwWh0AaeSpUFgzEc28rYKJW9hymnzj6f4cKsH_nRQEkUZ04g6dqMF2WrTpP5WixYrhCItc0ftFc0OFU\/s1600-h\/MEPT+OSC032.jpg\"><img decoding=\"async\" style=\"margin: 0px auto 10px; display: block; text-align: center; cursor: pointer;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2008\/07\/MEPTOSC032.jpg\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5221229218002477042\" border=\"0\" \/><\/a>Guys have been asking to see the schematic for my 30 meter QRSS MEPT beacon. Here&#8217;s the oscillator circuit. This actually started out on a plane ride. My son Billy and I were talking about electronics. I drew a basic schematic for an oscillator, and we built one when we got home. It originally used a 20 meter crystal. At one point we were playing &#8220;find the oscillator&#8221; &#8212; hiding it somewhere in the house, and tracking it down with a Sony shortwave receiver. Now, with some modifications, it is the first stage in my 30 meter MEPT beacon.<\/p>\n<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2008\/07\/MEPTAMP033.jpg\"><img decoding=\"async\" style=\"margin: 0px auto 10px; display: block; text-align: center; cursor: pointer;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2008\/07\/MEPTAMP033.jpg\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5221612185561853826\" border=\"0\" \/><\/a>An ugly schematic for a rig built with the ugly construction technique. Nothing fancy here. Two feedback amps and a PNP transistor as a switch to key them. I let the oscillator run continuously. (Let me know if you can hear the &#8220;backwave&#8221;!) About 20 mw out. As you can see, it doesn&#8217;t take much to get a QRSS signal on the air.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Guys have been asking to see the schematic for my 30 meter QRSS MEPT beacon. Here&#8217;s the oscillator circuit. This actually started out on a plane ride. My son Billy and I were talking about electronics. I drew a basic schematic for an oscillator, and we built one when we got home. It originally used &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2008\/07\/10\/my-beacon-mept-circuit\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;My Beacon (MEPT) Circuit&#8221;<\/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":[165],"tags":[],"class_list":["post-7324","post","type-post","status-publish","format-standard","hentry","category-qrss"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7324","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=7324"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7324\/revisions"}],"predecessor-version":[{"id":7326,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/7324\/revisions\/7326"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=7324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=7324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=7324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}