{"id":745,"date":"2014-06-15T16:54:41","date_gmt":"2014-06-15T14:54:41","guid":{"rendered":"http:\/\/www.pa3hcm.nl\/?p=745"},"modified":"2021-01-18T17:18:13","modified_gmt":"2021-01-18T16:18:13","slug":"stereo-to-mono-converter","status":"publish","type":"post","link":"https:\/\/www.pa3hcm.nl\/?p=745","title":{"rendered":"Stereo to mono converter"},"content":{"rendered":"\n
\"[Image]\"<\/a>
Inside view of my stereo to mono converter.<\/figcaption><\/figure><\/div>\n\n\n\n

My TV camera generates stereo audio, like most cameras do. However, my local ATV repeater<\/a> only supports mono audio. So to transmit a nice audio signal with my TV pictures, I needed a way to convert the stereo signal to mono.<\/p>\n\n\n\n\n\n\n\n

Circuit<\/h2>\n\n\n\n

Searching the web for a simple solution I found this circuit, published by Peter N. Petersen<\/a>:<\/p>\n\n\n\n

\"[image]\"<\/a>
Circuit of a simple stereo-to-mono-converter<\/figcaption><\/figure><\/div>\n\n\n\n


The circuit is a traditional opamp based mixer. The opamp suggested here is a TL072, unfortunately that chip was out of stock here. I found a nice replacement in my junk box: the LF356, although it has a different pin layout. Most opamp’s with FET inputs will probably do the job.<\/p>\n\n\n\n

Part list:<\/p>\n\n\n\n

R1   47k\nR2   47k\nR3   27k\nR4   10k\nR5   10k\nC1   1uF \/ 16V\nC2   1uF \/ 16V\nC3   3.3uF \/ 16V\nC4   10uF \/ 50V\nU1   TL072, OP27, LF356, etc... (check the pin layout of the selected opamp)<\/pre>\n\n\n\n
Check out Peter<\/a>‘s website for more details.<\/p>\n\n\n\n
Pictures<\/h2>\n\n\n\n
  • \"[Image]\"<\/figure><\/li>
  • \"[Image]\"<\/figure><\/li><\/ul><\/figure>\n","protected":false},"excerpt":{"rendered":"
    My TV camera generates stereo audio, like most cameras do. However, my local ATV repeater only supports mono audio. So to transmit a nice audio signal with my TV pictures, I needed a way to convert the stereo signal to mono.<\/p>\n","protected":false},"author":1,"featured_media":747,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,100],"tags":[58,72,27,79],"class_list":["post-745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-atv","category-misc","tag-atv-2","tag-audio","tag-beginners","tag-manhattan-style"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/posts\/745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=745"}],"version-history":[{"count":9,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions"}],"predecessor-version":[{"id":1896,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions\/1896"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=\/wp\/v2\/media\/747"}],"wp:attachment":[{"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pa3hcm.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}