{"id":8233,"date":"2012-01-24T11:04:00","date_gmt":"2012-01-24T00:04:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/24\/toroidal-transformers-does-size-matter\/"},"modified":"2025-07-22T00:16:14","modified_gmt":"2025-07-21T14:16:14","slug":"toroidal-transformers-does-size-matter","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/24\/toroidal-transformers-does-size-matter\/","title":{"rendered":"Toroidal Transformers:  Does Size Matter?"},"content":{"rendered":"<p><a onblur=\"try {parent.deselectBloggerImageGracefully();} catch(e) {}\" href=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhzxeCyBMBA7a7DbHImzgh6Gh1-Hnwn1oXX1AY30F0eP34PiY15F5etHvwJ5RDIg7bFPRkHoJoLpNkok3AmUf0h_K7iLK_C5QaVCyJaMV48k2lKUn6T4wfdZfzrtJBSqXO-_ISJTXfTtwE\/s1600\/two+toroids\"><img decoding=\"async\" style=\"display: block; margin: 0px auto 10px; text-align: center; cursor: pointer; width: 400px; height: 261px;\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2012\/01\/image_1753107371.jpg\" alt=\"\" id=\"BLOGGER_PHOTO_ID_5701158678241792626\" border=\"0\" \/><\/a><span style=\"font-size:130%;\"><span style=\"font-weight: bold;\">I continue to tweak and peak the JBOT amplifier in the Azores 17 SSB transmitter. On this version I used some FT-50-43 toroidal cores instead of the smaller FT-37-43 cores recommended by Farhan. This morning I was experimenting with the output transformer. I seem to get noticeably more output with a transformer made with four FT-37-43 cores than I do with one made with four larger FT-50-43 cores. <\/span><\/p>\n<p><span style=\"font-weight: bold;\">I noticed something similar on my previous JBOT: performance improved when I switched from some relatively large binocular cores and went to the recommended FT-37-43.<\/span><\/p>\n<p><span style=\"font-weight: bold;\">So, what do you guys think? Could there be lower losses using the smaller cores? Any other reason why the smaller transformers seem to be doing better? <\/span><br \/><\/span><br \/>Our book: &#8220;SolderSmoke &#8212; Global Adventures in Wireless Electronics&#8221;<a href=\"http:\/\/soldersmoke.com\/book.htm\">http:\/\/soldersmoke.com\/book.htm<\/a>Our coffee mugs, T-Shirts, bumper stickers: <a href=\"http:\/\/www.cafepress.com\/SolderSmoke\">http:\/\/www.cafepress.com\/SolderSmoke<\/a>Our Book Store: <a href=\"http:\/\/astore.amazon.com\/contracross-20\">http:\/\/astore.amazon.com\/contracross-20<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I continue to tweak and peak the JBOT amplifier in the Azores 17 SSB transmitter. On this version I used some FT-50-43 toroidal cores instead of the smaller FT-37-43 cores recommended by Farhan. This morning I was experimenting with the output transformer. I seem to get noticeably more output with a transformer made with four &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2012\/01\/24\/toroidal-transformers-does-size-matter\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Toroidal Transformers:  Does Size Matter?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":8234,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84,66,235],"tags":[],"class_list":["post-8233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amplifier-theory","category-farhan","category-jbot"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8233","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=8233"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8233\/revisions"}],"predecessor-version":[{"id":8235,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/8233\/revisions\/8235"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/8234"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=8233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=8233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=8233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}