{"id":9675,"date":"2010-03-28T18:30:00","date_gmt":"2010-03-28T07:30:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2010\/03\/28\/building-w3pms-colpitts-oscillator\/"},"modified":"2025-07-22T03:03:00","modified_gmt":"2025-07-21T17:03:00","slug":"building-w3pms-colpitts-oscillator","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2010\/03\/28\/building-w3pms-colpitts-oscillator\/","title":{"rendered":"Building W3PM&#8217;s Colpitts Oscillator"},"content":{"rendered":"<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2010\/03\/Screenshot-7.png\"><img decoding=\"async\" style=\"margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 282px;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2010\/03\/Screenshot-7.png\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5453758231382179746\" border=\"0\" \/><\/a><br \/><span style=\"font-weight: bold;\">I took a break from all the computer stuff and decided to melt some solder this weekend. <\/span><\/p>\n<p><span style=\"font-weight: bold;\">W3PM has a neat WSPR rig on his site. I decided to build at least parts of it. Today I put together the Colpitts oscillator. I really like this circuit &#8212; it produces enough power to drive a diode ring mixer directly. Mine went together very smoothly. Sure enough, mine produces about 10 mW.<\/span><\/p>\n<p><span style=\"font-weight: bold;\">It was good to get back to solder melting. I used circular pads sent to me by Jerry NR5A. And parts sent by Jim AL7RV, and by Mike AA1TJ. EMRFD provided very useful background info on the circuit. I powered the prototype up with my Kempton Park power supply with the current limiting chip provided by Tony G4WIF. So it was a like a team effort. Thanks to all! <\/span><\/p>\n<p><span style=\"font-weight: bold;\">I&#8217;ll try to get the next podcast out mid-week. <\/span><\/p>\n<p><span style=\"font-weight: bold;\">73<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I took a break from all the computer stuff and decided to melt some solder this weekend. W3PM has a neat WSPR rig on his site. I decided to build at least parts of it. Today I put together the Colpitts oscillator. I really like this circuit &#8212; it produces enough power to drive a &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2010\/03\/28\/building-w3pms-colpitts-oscillator\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Building W3PM&#8217;s Colpitts Oscillator&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":9676,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-9675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wspr"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9675","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=9675"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9675\/revisions"}],"predecessor-version":[{"id":9677,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9675\/revisions\/9677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/9676"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}