\n\tLast week my RX antenna switching cards finally came in the mail from the PCB maker. Had to solder them up right away last week. =) The design came out just the way I wanted. There are 7 antenna inputs per card and possibility to extend to another card with additional 7 antenna inputs, so in total it will be possible to switch any of 14 RX antennas to any of 3 receievers. Theese cards will be in the forest about 150m away from the house\/shack in a plastic box as described in an earlier post.\n<\/p>\n
\n\tThe relay matrix for each receiver is controlled by a 4-bit binary code, where the last bit is used only for switching to the extended card. All of the inputs are protected by RC low-pass filters and MOVs. The antenna inputs and outputs are protected by 90V gas discharge tubes. I added the possibility to connect preamps in the future with relays for that as well. Here are some pics of the finished cards.\n<\/p>\n[Not a valid template]\n","protected":false},"excerpt":{"rendered":"
Last week my RX antenna switching cards finally came in the mail from the PCB maker. Had to solder them [&hellip<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8,6,3],"tags":[],"_links":{"self":[{"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/posts\/221"}],"collection":[{"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/sm0w.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=221"}],"version-history":[{"count":2,"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/posts\/221\/revisions"}],"predecessor-version":[{"id":223,"href":"http:\/\/sm0w.com\/index.php?rest_route=\/wp\/v2\/posts\/221\/revisions\/223"}],"wp:attachment":[{"href":"http:\/\/sm0w.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sm0w.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=221"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sm0w.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}