{"id":9424,"date":"2011-05-05T10:08:00","date_gmt":"2011-05-05T00:08:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2011\/05\/05\/t-r-success-with-wspr\/"},"modified":"2025-07-22T02:30:25","modified_gmt":"2025-07-21T16:30:25","slug":"t-r-success-with-wspr","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2011\/05\/05\/t-r-success-with-wspr\/","title":{"rendered":"T\/R Success with WSPR"},"content":{"rendered":"<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2011\/05\/TRelays.jpg\"><img decoding=\"async\" style=\"display: block; margin: 0px auto 10px; text-align: center; cursor: pointer; width: 400px; height: 299px;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2011\/05\/TRelays.jpg\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5603172251850933810\" border=\"0\" \/><\/a><span style=\"font-size:130%;\"><span style=\"font-weight: bold;\">Thanks to everyone who sent in advice on my WSPR t\/r troubles. I now have it all sorted out. In the image above you can see the cable from the serial port that carries the RTS T\/R signal from the computer. It goes to a switching transistor that controls a relay that in turn switches the three relays that actually do T\/R for the rig. One question: On the Linux computer the RTS signal seems to switch between +5 and -5 volts, but on the Windows machine it was +10 and -10. Why? <\/span><br \/><span style=\"font-weight: bold;\">I&#8217;m really pleased to have the computer interface working. It is kind of neat to bring together the complex technology of the computer and the simple technology of a DSB\/Direct Conversion rig. <\/span><br \/><span style=\"font-weight: bold;\"> <\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thanks to everyone who sent in advice on my WSPR t\/r troubles. I now have it all sorted out. In the image above you can see the cable from the serial port that carries the RTS T\/R signal from the computer. It goes to a switching transistor that controls a relay that in turn switches &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2011\/05\/05\/t-r-success-with-wspr\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;T\/R Success with WSPR&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":9425,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,246,26],"tags":[],"class_list":["post-9424","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dsb","category-linux","category-wspr"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9424","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=9424"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9424\/revisions"}],"predecessor-version":[{"id":9426,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9424\/revisions\/9426"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/9425"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}