{"id":2097,"date":"2016-06-15T23:35:00","date_gmt":"2016-06-15T13:35:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2016\/06\/15\/jan-pa3gsvs-amazing-mate-for-the-mighty-midget\/"},"modified":"2025-07-21T12:43:01","modified_gmt":"2025-07-21T02:43:01","slug":"jan-pa3gsvs-amazing-mate-for-the-mighty-midget","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2016\/06\/15\/jan-pa3gsvs-amazing-mate-for-the-mighty-midget\/","title":{"rendered":"Jan PA3GSV’s Amazing Mate for the Mighty Midget"},"content":{"rendered":"
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We have featured the amazing homebrew work of PA3GSV before: <\/b><\/div>\n
http:\/\/soldersmoke.blogspot.com\/2016\/04\/my-mate-for-mighty-midget-thermatron.html<\/a><\/b><\/div>\n

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Jan is at it again, this time building a Dutch version of Lew McCoy’s Mate for the Mighty Midget. Look at front panel! But wait, there is more!<\/b><\/div>\n
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Here is a side view of the chassis. Wow. What, you may ask, is that round thing? <\/b><\/div>\n
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Holy cow! Homebrew Vernier reduction drive made from the cap of a sewer pipe. And a homebrew dial cord arrangement. Jan is clearly breaking new ground in ham radio homebrew re-purposing. <\/b><\/div>\n
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Jan writes: <\/b><\/div>\n

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Bill:<\/b><\/div>\n
Here a little update on the MMrx.<\/b><\/span><\/div>\n
Got almost all the parts, except for the Miller 4411 300 uH coils, for which I am attempting to make my own.<\/b><\/span><\/div>\n
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While I was looking for some pictures of this coil, if it was shielded or not (found a vintage online Miller catalogue <\/b><\/span>J<\/b><\/span> ),<\/b><\/span><\/div>\n
I stumbled across this article, the W2MQ \u201cHamster\u201d <\/b><\/span><\/div>\n
There is no mention of the MMrx, but the text is very in line with the latter. Nice read.<\/b><\/span><\/div>\n
<\/b><\/span>http:\/\/www.njarc.org\/broadcaster\/BC2010-04.pdf<\/b><\/span><\/a><\/div>\n
<\/b><\/span>Also while looking for parts, I saw this supplier of FT-241 xtals who sell for reasonable prices ($10) .<\/b><\/span><\/div>\n
Maybe you already know this company:<\/b><\/span><\/div>\n
<\/b><\/span>https:\/\/www.fairradio.com\/catalog.php?mode=view&categoryid=198<\/b><\/a><\/span><\/div>\n
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<\/b>Vernier drive 1:19<\/b><\/span><\/div>\n
The drum is made from a sewerage end cap got from the hardware store.<\/b><\/span><\/div>\n
Still under construction <\/b><\/span>J<\/b><\/span> <\/b><\/span><\/div>\n

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Added a front control to switch the BFO on\/off, together with another crystal or some arrangement to make AM (broadcast) reception possible.<\/b><\/span><\/div>\n
I want to try a regen detector instead of the 2 germanium diodes, followed by a pentode for some more audio output.<\/b><\/span><\/div>\n
Regen and AF gain control are also at the front.<\/b><\/span><\/div>\n
In your video it looked like there was a screwdriver sticking out of the BFO oscillator coil, a trigger to put this control on the front as well <\/b><\/span>J<\/b><\/span><\/span><\/div>\n
As there is no AGC, the (S) meter will measure the plate current of the RF amplifier tube.<\/b><\/span><\/div>\n
So, a lot of experimenting to do, and still busy with some of the mechanics.<\/b><\/span><\/div>\n
<\/b><\/span>73 Jan<\/b><\/span><\/div>\n

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We have featured the amazing homebrew work of PA3GSV before: http:\/\/soldersmoke.blogspot.com\/2016\/04\/my-mate-for-mighty-midget-thermatron.html Jan is at it again, this time building a Dutch version of Lew McCoy’s Mate for the Mighty Midget. Look at front panel! But wait, there is more! Here is a side view of the chassis. Wow. What, you may ask, is that round … Continue reading “Jan PA3GSV’s Amazing Mate for the Mighty Midget”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[200,166,101],"tags":[],"class_list":["post-2097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mate-for-the-mighty-midget","category-netherlands","category-tubes"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2097","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=2097"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2097\/revisions"}],"predecessor-version":[{"id":2101,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2097\/revisions\/2101"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/2098"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=2097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=2097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=2097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}