{"id":2324,"date":"2010-03-27T10:06:00","date_gmt":"2010-03-26T23:06:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2010\/03\/27\/polyakov-plus-dual-band-receiver-with-subharmonic-mixer\/"},"modified":"2025-07-21T13:05:42","modified_gmt":"2025-07-21T03:05:42","slug":"polyakov-plus-dual-band-receiver-with-subharmonic-mixer","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2010\/03\/27\/polyakov-plus-dual-band-receiver-with-subharmonic-mixer\/","title":{"rendered":"Polyakov Plus! Dual-band Receiver with Subharmonic Mixer"},"content":{"rendered":"

\"\"<\/a> I found it!<\/span> SPRAT 110, Spring 2002, page 5. A short article by OM Rudi Burse, DK2RS. <\/span> This is the variation on the Polyakov Russian Mixer that I mentioned a couple of days ago. I’d been digging through piles of books and old magazines looking for this. My wife thought I’d gone nuts. (Well, nuttier than usual, actually.) It didn’t help that I responded “The Polyakov Russian sub-harmonic mixer circuit with two band application!” when she asked what I was looking for. Of course, I should have known that it was in SPRAT. It just happened that the issue with this article was piled under a lot of junk on the workbench. <\/span> I really like this circuit. Ingenious. And now that I have come to understand mixers a bit better, I can appreciate this one more. Here’s how I’d<\/span> explain it: With the switch closed, the signal from the LO “opens” one of the diodes on the positive peak, and it opens the other diode on the negative peak. So that RF signal from the antenna is getting sampled and mixed twice each cycle of the LO. The resulting complex waveform has sum and difference frequencies of RF+2LO and RF-2LO. With the switch open, you only have one diode sampling the RF, and it opens only ONCE each LO cycle. So the complex waveform that comes out of this single diode had frequencies of RF+LO and RF-LO. <\/span> This opens the possiblity of DC receivers for 80\/40, 40\/20, 20\/10 meters, etc. <\/span> I guess a key adjustment in this circuit would be getting the LO level just right. <\/span> Thanks SPRAT! Thanks Rudi! Thanks Vladimir Polyakov! <\/span><\/p>\n


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You’ll see in the comments attached to my last blog post that our man on the left coast, Steve Smith, gave that cute little Doug DeMaw\/Vlad Polyakov receiver a name that might set American-Russian hamrelations back a bit: He called it “Vlad The Inhaler.” Good one Steve! (But you might want to stay out of the diplo game!) <\/span><\/span><\/div>\n

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Check out “SolderSmoke — Global Adventures in Wireless Electronics” <\/span>http:\/\/soldersmoke.com\/book.htm<\/a><\/span><\/div>\n","protected":false},"excerpt":{"rendered":"

I found it! SPRAT 110, Spring 2002, page 5. A short article by OM Rudi Burse, DK2RS. This is the variation on the Polyakov Russian Mixer that I mentioned a couple of days ago. I’d been digging through piles of books and old magazines looking for this. My wife thought I’d gone nuts. (Well, nuttier … Continue reading “Polyakov Plus! Dual-band Receiver with Subharmonic Mixer”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2325,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34,55,17],"tags":[],"class_list":["post-2324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mixer-theory","category-polyakov-vladimir","category-sprat"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2324","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=2324"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2324\/revisions"}],"predecessor-version":[{"id":2326,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/2324\/revisions\/2326"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/2325"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=2324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=2324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=2324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}