{"id":846,"date":"2012-03-27T23:34:18","date_gmt":"2012-03-28T04:34:18","guid":{"rendered":"http:\/\/abrammorphew.com\/notes\/?p=846"},"modified":"2012-03-27T23:55:37","modified_gmt":"2012-03-28T04:55:37","slug":"tda2040-instrument-amplifier","status":"publish","type":"post","link":"http:\/\/abrammorphew.com\/notes\/2012\/03\/27\/tda2040-instrument-amplifier\/","title":{"rendered":"TDA2040 Instrument Amplifier"},"content":{"rendered":"<p><a href=\"http:\/\/abrammorphew.com\/notes\/wp-content\/uploads\/2012\/03\/TDA2040_circuit.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"479\" src=\"http:\/\/abrammorphew.com\/notes\/wp-content\/uploads\/2012\/03\/TDA2040_circuit.jpg\" alt=\"\" title=\"TDA2040_circuit\"  class=\"alignnone size-full wp-image-884\" \/><\/a><\/p>\n<p><a href=\"http:\/\/abrammorphew.com\/notes\/wp-content\/uploads\/2012\/03\/Screenshot-032712-231528.png\"><img loading=\"lazy\" decoding=\"async\" width=\"641\" height=\"480\" src=\"http:\/\/abrammorphew.com\/notes\/wp-content\/uploads\/2012\/03\/Screenshot-032712-231528.png\" alt=\"\" title=\"Screenshot - 032712 - 23:15:28\" class=\"alignnone size-full wp-image-879\" \/><\/a><\/p>\n<p>the need for small and portable amplifiers has arisen mainly by a desire to come up with some sort of all-purpose busking amplifier. here is the first screen shot of the output from the preamp section. the entire amplifier is powering an Eminence Beta-12LTA off of a mere 6V. don&#8217;t ask me how. it took a while to find the right combination of resistors for the TL082 to run stable at such a low voltage. it&#8217;s also surprisingly loud being that it&#8217;s about 26V away from the recommended supply (\u00b116V). i&#8217;ll probably be posting a schematic soon.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>the need for small and portable amplifiers has arisen mainly by a desire to come up with some sort of all-purpose busking amplifier. here is the first screen shot of the output from the preamp section. the entire amplifier is powering an Eminence Beta-12LTA off of a mere 6V. don&#8217;t ask me how. it took [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[21,147,146,131,93],"class_list":["post-846","post","type-post","status-publish","format-standard","hentry","category-notes","tag-amplifier","tag-electronic","tag-tda2040","tag-tl082","tag-xoscope"],"_links":{"self":[{"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/posts\/846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/comments?post=846"}],"version-history":[{"count":3,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/posts\/846\/revisions"}],"predecessor-version":[{"id":882,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/posts\/846\/revisions\/882"}],"wp:attachment":[{"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/media?parent=846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/categories?post=846"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/abrammorphew.com\/notes\/wp-json\/wp\/v2\/tags?post=846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}