{"id":159,"date":"2023-04-12T06:10:19","date_gmt":"2023-04-12T06:10:19","guid":{"rendered":"https:\/\/oe9sau.msauter.at\/?p=159"},"modified":"2024-02-15T07:58:48","modified_gmt":"2024-02-15T07:58:48","slug":"portable-qrp-multi-band-cw-trx-by-dm3mat","status":"publish","type":"page","link":"https:\/\/oe9sau.msauter.at\/?page_id=159","title":{"rendered":"Portable QRP Multi-band CW TRX by DM3MAT"},"content":{"rendered":"<p><a href=\"https:\/\/github.com\/hmatuschek\/cwtrx\" target=\"_blank\" rel=\"noopener\">Orginal page DM3MAT@Github<\/a><br \/>\n<a href=\"https:\/\/dm3mat.darc.de\/cw2019\/manual.pdf\" target=\"_blank\" rel=\"noopener\">See original assembly manual by DM3MAT<\/a><\/p>\n<pre>Attached a view pics of my own build.\r\n<a href=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12.jpeg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-212 size-medium\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-12.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a> \r\n<a href=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10.jpeg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-177 size-medium\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-10.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a> \r\n<a href=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1.jpeg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-168 size-medium\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-1.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Hotfixes explained in manual with 470pF cap against high-frequency ripple on the 5V rail and 4x diodes to save the mixer against saturation of the audio-chain ! \r\n\r\n<a href=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620.jpeg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-176 size-medium\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-9-e1681639020620.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\r\n <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-174\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-7.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> \r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-173\" src=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6-300x225.jpeg 300w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6-1024x768.jpeg 1024w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6-768x576.jpeg 768w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6-1536x1152.jpeg 1536w, https:\/\/oe9sau.msauter.at\/wp-content\/uploads\/2023\/04\/CW_TRX_DM3MAT@OE9SAU-6.jpeg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>\r\nUpper case with opening and cover for internal speaker\r\n\r\nFor leftover PCB\u00b4s see <a href=\"https:\/\/oe9sau.msauter.at\/?page_id=2\" target=\"_blank\" rel=\"noopener\">PCB swap meet<\/a><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Orginal page DM3MAT@Github See original assembly manual by DM3MAT Attached a view pics of my own build. Hotfixes explained in manual with 470pF cap against high-frequency ripple on the 5V rail and 4x diodes to save the mixer against saturation of the audio-chain ! Upper case with opening and cover for internal speaker For leftover &hellip; <a href=\"https:\/\/oe9sau.msauter.at\/?page_id=159\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Portable QRP Multi-band CW TRX by DM3MAT<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":166,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-159","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/pages\/159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=159"}],"version-history":[{"count":27,"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/pages\/159\/revisions"}],"predecessor-version":[{"id":222,"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/pages\/159\/revisions\/222"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=\/wp\/v2\/media\/166"}],"wp:attachment":[{"href":"https:\/\/oe9sau.msauter.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}