{"id":9464,"date":"2020-05-31T12:49:00","date_gmt":"2020-05-31T02:49:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2020\/05\/31\/qcx-ssb-but-how-much-qcx-remains\/"},"modified":"2025-07-22T02:34:53","modified_gmt":"2025-07-21T16:34:53","slug":"qcx-ssb-but-how-much-qcx-remains","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2020\/05\/31\/qcx-ssb-but-how-much-qcx-remains\/","title":{"rendered":"QCX SSB &#8212; But How Much QCX Remains?"},"content":{"rendered":"<p><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"247\" src=\"https:\/\/www.youtube.com\/embed\/SRgaoK884tY\" width=\"440\"><\/iframe><\/p>\n<p> <b>Hack-A-Day carried a very nice video describing recent efforts to turn Hans Summers&#8217; amazing QCX CW monoband transceiver into a multi-mode, multi-mode (including SSB) rig (see above). This is project will greatly interest QCX and SDR fans. <\/b><br \/> <b><br \/><\/b> <b>But I wondered how much of the old QCX is still there after the modification. Not much, it turns out. <\/b><br \/> <b><br \/><\/b> <b>Here is the bloc diagram of the QCX. It is essentially a phasing rig, using the same principles as my venerable HT-37 transmitter and my version of KK7B&#8217;s R2 receiver: <\/b><\/p>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"> <a href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2020\/05\/QCXBloc.png\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" data-original-height=\"253\" data-original-width=\"447\" height=\"226\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2020\/05\/QCXBloc.png\" width=\"400\" \/><\/a><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b>Yesterday Paul VK3HN sent me the schematic of the new multi-mode, multi-band version: <\/b><\/div>\n<p> <\/p>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"> <a href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2020\/05\/uQCXschematic.png\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" data-original-height=\"627\" data-original-width=\"871\" height=\"287\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2020\/05\/uQCXschematic.png\" width=\"400\" \/><\/a><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b>Notice how different it is. I thought that perhaps the new rig would keep something of the I-Q circuitry of the QCX, but it does not. This is not a criticism, just an observation. <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b><br \/><\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b>But here is something that harks back to a topic we&#8217;ve been debating on the blog and podcast. Notice that the top diagram is a bloc diagram. There is a lot of circuitry in most of those boxes &#8212; lots of resistors, capacitors, inductors, and transistors. There is a schematic diagram under that bloc diagram. But look at the second diagram. While it looks like one, that one is NOT a bloc diagram. That IS the schematic diagram. Most of the circuity has been sucked into the chips. <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b><br \/><\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b>While many will prefer the rig described by the second diagram, I remain an HDR guy, and don&#8217;t really like seeing the circuitry disappear into the ICs. But, to each his own. This is all for fun. Congratulations to the guys working on the new rig. <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hack-A-Day carried a very nice video describing recent efforts to turn Hans Summers&#8217; amazing QCX CW monoband transceiver into a multi-mode, multi-mode (including SSB) rig (see above). This is project will greatly interest QCX and SDR fans. But I wondered how much of the old QCX is still there after the modification. Not much, it &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2020\/05\/31\/qcx-ssb-but-how-much-qcx-remains\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;QCX SSB &#8212; But How Much QCX Remains?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":9465,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29,126,342,54,40,198],"tags":[],"class_list":["post-9464","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-australia","category-campbell-rick","category-phasing","category-phasing-rigs","category-sdr","category-summers-hans"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9464","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=9464"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9464\/revisions"}],"predecessor-version":[{"id":9467,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9464\/revisions\/9467"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/9465"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}