{"id":3850,"date":"2013-09-11T16:36:26","date_gmt":"2013-09-11T21:36:26","guid":{"rendered":"http:\/\/w0ep.us\/OM\/?p=3850"},"modified":"2013-09-11T16:41:27","modified_gmt":"2013-09-11T21:41:27","slug":"scaf-audio-filter","status":"publish","type":"post","link":"http:\/\/w0ep.us\/OM\/?p=3850","title":{"rendered":"SCAF audio filter"},"content":{"rendered":"<p>[Today&#8217;s run: 9.11 miles]\u00a0 (actually it was a bit more but my wife turned off her Garmin GPS at 9.11)<\/p>\n<p>I&#8217;m on a variety of emailing lists which relate to ham radio activities.\u00a0 Earlier this year a man on one of them advertised &#8220;parts&#8221; for a <a href=\"http:\/\/w0ep.us\/OM\/?p=3699\">SCAF filter project<\/a>.\u00a0 At the time I had been wrestling with audio filtering needs, so this was apropos to me.<\/p>\n<p>I responded.\u00a0 He sent me about 5 parts and the plans from a 1986 QST magazine.\u00a0 The parts he supplied were the more difficult ones to find.<\/p>\n<p>I looked at the article.\u00a0 Pretty cool stuff.\u00a0 Eventually that article resulted in a commercial product called the SuperSCAF filter.\u00a0 You can find those on ebay periodically.<\/p>\n<p>Anyway, I ordered the rest of the parts from Digikey.com , laid out circuit boards, got everything installed, and here we are.\u00a0 It works!\u00a0 I have everything laid out on a &#8220;breadboard&#8221;.\u00a0 That is easy to do because it requires no metal work and keeps everything electrically separated.\u00a0 I will probably use it a bit in the current configuration.\u00a0 Then I need to get a metal box and get things installed in the box.\u00a0 (I&#8217;ve had more than one project go bad at the &#8220;put it in a box&#8221; stage.)<\/p>\n<p><a href=\"http:\/\/w0ep.us\/OM\/?attachment_id=3851\" rel=\"attachment wp-att-3851\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-3851\" alt=\"SCAF breadboard\" src=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0240-700x467.jpg\" width=\"700\" height=\"467\" srcset=\"http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0240-700x467.jpg 700w, http:\/\/w0ep.us\/OM\/wp-content\/uploads\/2013\/09\/GEDC0240-1024x684.jpg 1024w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Today&#8217;s run: 9.11 miles]\u00a0 (actually it was a bit more but my wife turned off her Garmin GPS at 9.11) I&#8217;m on a variety of emailing lists which relate to ham radio activities.\u00a0 Earlier this year a man on one of them advertised &#8220;parts&#8221; for a SCAF filter project.\u00a0 At the time I had been [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3850","post","type-post","status-publish","format-standard","hentry","category-ham-radio"],"_links":{"self":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/3850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3850"}],"version-history":[{"count":3,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/3850\/revisions"}],"predecessor-version":[{"id":3853,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/3850\/revisions\/3853"}],"wp:attachment":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3850"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}