{"id":9599,"date":"2016-04-05T22:16:00","date_gmt":"2016-04-05T12:16:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2016\/04\/05\/my-mate-for-the-mighty-midget-thermatron-receiver\/"},"modified":"2025-07-22T02:51:23","modified_gmt":"2025-07-21T16:51:23","slug":"my-mate-for-the-mighty-midget-thermatron-receiver","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2016\/04\/05\/my-mate-for-the-mighty-midget-thermatron-receiver\/","title":{"rendered":"My Mate for the Mighty Midget Thermatron Receiver"},"content":{"rendered":"<div class=\"separator\" style=\"clear: both; text-align: center;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white; margin-left: 1em; margin-right: 1em;\"> <iframe loading=\"lazy\" allowfullscreen=\"\" frameborder=\"0\" height=\"248\" src=\"https:\/\/www.youtube.com\/embed\/uOv1lE8uxFI?rel=0\" width=\"440\"><\/iframe><\/div>\n<p> <\/p>\n<div style=\"text-align: left;\"> <b>A few days ago I received an e-mail from Jan PA3GSV &#8212; Jan is working on a receiver similar to my old Mate for the Might Midget and had some questions about how I&#8217;d handled the filter portion of the circuit. Then on Sunday, while listening to Eric&#8217;s interview with Farhan on the QSO Today podcast, I got so enthused that I felt compelled to work on a homebrew receiver. So out came the old Mate for the Mighty Midget. I built this thing in 1997-1998. It is described here: <\/b><\/div>\n<div style=\"text-align: left;\"> <a href=\"http:\/\/soldersmoke.blogspot.com\/search?q=Mighty+Midget\"><b>http:\/\/soldersmoke.blogspot.com\/search?q=Mighty+Midget<\/b><\/a><\/div>\n<div style=\"text-align: left;\"><\/div>\n<div style=\"text-align: left;\"> <b>In the above video I was listening on 75 meters to a very congenial early morning roundtable featuring W4CH, <\/b><b>K5KBZ and others. <\/b><b>I know, I know, this is the third or fourth video that I&#8217;ve made of this thing. This is almost as bad as 2B-mania. Or the Michigan Mighty Mite thing. I blame Jan. And Eric. And Farhan. And Grayson. And Lew McCoy!<\/b> <\/div>\n<div style=\"text-align: left;\"><\/div>\n<div style=\"text-align: left;\"> <b>Here is my e-mail exchange with Jan:<\/b> <\/div>\n<div style=\"text-align: left;\"><\/div>\n<div style=\"text-align: left;\"> <i><b>Bill:<\/b><\/i> <\/div>\n<div class=\"yiv3600582436MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_2532\" lang=\"EN-US\"><b><i>I recently build the W1TS two tube xtal controlled transmitter, and am looking for a 80\/40m companion for this that has a crystal filter.<\/i><\/b><\/span><\/div>\n<div class=\"yiv3600582436MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_2534\" lang=\"EN-US\"><b><i>At first, I wanted to build the \u201cSimplex Super\u201d and finally got hold of the 1700 kc crystals, but then they got lost in the mail\u2026<\/i><\/b><\/span><\/div>\n<div class=\"yiv3600582436MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_2536\" lang=\"EN-US\"><i><b>Only part of a two box shipment arrived, with 455 kc fundamental frequency FT-241 crystals, so now I am looking for a diagram using a 455 kc IF. Jan<\/b><\/i><\/span><\/div>\n<div class=\"yiv3600582436MsoNormal\" style=\"text-align: left;\"> <span lang=\"EN-US\"><b><i><br \/><\/i><\/b><\/span><\/div>\n<div style=\"text-align: left;\"> <span lang=\"EN-US\"><\/span><\/p>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3091\" style=\"background: white; text-align: left;\"> <span lang=\"EN-US\"><span id=\"yui_3_16_0_ym19_1_1459892764657_3090\"><b>Jan: In this link you will find the schematic for the receiver I built. <\/b><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><\/div>\n<p> <span lang=\"EN-US\"><\/p>\n<div style=\"text-align: left;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3087\" style=\"background: white; text-align: left;\"> <b> <\/b><span id=\"yui_3_16_0_ym19_1_1459892764657_3085\"><a href=\"http:\/\/jvgavila.com\/mmrx_3.gif\" id=\"yui_3_16_0_ym19_1_1459892764657_3084\" rel=\"nofollow\" shape=\"rect\" target=\"_blank\"><b>http:\/\/jvgavila.com\/mmrx_3.gif<\/b><\/a><\/span><\/div>\n<div style=\"text-align: left;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3083\" style=\"background: white; text-align: left;\"> <b> <\/b><span id=\"yui_3_16_0_ym19_1_1459892764657_3081\"><b>I was not able to build the filter with the two 455 kc crystals. I could not obtain the needed crystals. I used two 455 kc IF transformers as described in my article. This resulted in a very broad frequency response but it was OK and quite good for AM. <\/b><\/span><\/div>\n<div style=\"text-align: left;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3080\" style=\"background: white; text-align: left;\"> <b> <\/b><span id=\"yui_3_16_0_ym19_1_1459892764657_3078\"><b>Last year I put in a Toyo 455 kc SSB filter, but I did not match the impedances, so the results were not good. Your e-mail makes me want to work on this again! <\/b><\/span><\/div>\n<div style=\"text-align: left;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3093\" style=\"background: white; text-align: left;\"> <b> <\/b><span id=\"yui_3_16_0_ym19_1_1459892764657_3075\"><b>Let me know how your receiver turns out. <\/b><\/span><\/div>\n<div style=\"text-align: left;\"> <\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3094\" style=\"background: white; text-align: left;\"> <b> 73 Bill N2CQR<\/b><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white; text-align: left;\"><\/div>\n<div class=\"yiv3600582436MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_3002\" style=\"font-size: 11.0pt;\"><i><b>Thanks for your reply.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_2996\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>It is a neat looking little receiver.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_2998\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>And yes, I also have a cardboard box labeled \u201cgood junk\u201d which is filled with stuff from ham fests <\/b><\/i><\/span><span lang=\"EN-US\" style=\"color: #1f497d; font-family: \"wingdings\"; font-size: 11.0pt;\"><i><b>J<\/b><\/i><\/span><span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_3000\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>Finally it will be put to good use!<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_3007\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>I printed the article for some evening reading this week.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_3009\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>It will take me some time building this receiver, as there is some metalwork and mechanics involved.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span id=\"yui_3_16_0_ym19_1_1459892764657_3011\" lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>I will let you know how the receiver turns out, and I am also curious what improvements you make on yours.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b> <\/b><\/i><\/span><span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>Thanks again, and I will let you know.<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b> <\/b><\/i><\/span><span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><b>73 Jan PA3GSV<\/b><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><b><i><br \/><\/i><\/b><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"text-align: left;\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><b>Wow, Jan has the Knack! Check out his station: <\/b><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><b><br \/><\/b><\/span><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"> <span lang=\"EN-US\" style=\"font-size: 11pt; margin-left: 1em; margin-right: 1em;\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"179\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2016\/04\/1222_174525_Richtone_HDR_resized.jpg\" style=\"height: 253px; width: 450px;\" width=\"320\" \/><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\"><\/div>\n<p> <\/span> <\/p>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white; text-align: left;\"> <b>That&#8217;s the W1TS rig on the left. More pictures from Jan on his QRZ.com site. He too uses wood cabinets! I&#8217;m not alone! Here&#8217;s Jan, PA3GSV<\/b><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white; text-align: left;\"> <b><br \/><\/b><\/div>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white;\"> <img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"fancybox-image\" height=\"400\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2016\/04\/QRZCOM.jpg\" width=\"357\" \/><\/div>\n<p> <span lang=\"EN-US\"><\/span><\/p>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3094\" style=\"background: white;\"> <span lang=\"EN-US\"><br \/><\/span><\/div>\n<p> <span lang=\"EN-US\"> <\/p>\n<div class=\"yiv0269830253MsoNormal\" style=\"background: white;\"><\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3094\" style=\"background: white;\"><\/div>\n<div class=\"yiv3600582436MsoNormal\"><\/div>\n<div class=\"yiv3600582436MsoNormal\"><\/div>\n<div class=\"yiv3600582436MsoNormal\"><\/div>\n<div class=\"yiv3600582436MsoNormal\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"><i><br \/><\/i><\/span><\/div>\n<div class=\"yiv0269830253MsoNormal\" id=\"yui_3_16_0_ym19_1_1459892764657_3018\"> <span lang=\"EN-US\" style=\"font-size: 11.0pt;\"> <\/span><\/div>\n<p> <\/span> <\/p>\n<div class=\"yiv3600582436MsoNormal\"><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A few days ago I received an e-mail from Jan PA3GSV &#8212; Jan is working on a receiver similar to my old Mate for the Might Midget and had some questions about how I&#8217;d handled the filter portion of the circuit. Then on Sunday, while listening to Eric&#8217;s interview with Farhan on the QSO Today &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2016\/04\/05\/my-mate-for-the-mighty-midget-thermatron-receiver\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;My Mate for the Mighty Midget Thermatron Receiver&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":9600,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,166,101],"tags":[],"class_list":["post-9599","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-farhan","category-netherlands","category-tubes"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9599","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=9599"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9599\/revisions"}],"predecessor-version":[{"id":9603,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9599\/revisions\/9603"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/9600"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}