{"id":230,"date":"2006-03-17T17:11:36","date_gmt":"2006-03-17T17:11:36","guid":{"rendered":"http:\/\/www.briangreene.com\/bhg\/2006\/home-made-ipod-amplifier\/"},"modified":"2006-03-17T17:11:36","modified_gmt":"2006-03-17T17:11:36","slug":"home-made-ipod-amplifier","status":"publish","type":"post","link":"https:\/\/briangreene.com\/bhg\/2006\/home-made-ipod-amplifier\/","title":{"rendered":"home made ipod amplifier"},"content":{"rendered":"

\"sonyI was looking for a iPod amp so I got an 1990’s Dictaphone which was unused (record mechanism broken). It didn’t amplify its external input through its built in speaker because in default mode the external input would be a better quality microphone than the built in microphone which suffers motor noise like most Dictaphones of its era, and such use would howl feedback.<\/p>\n

So I opened the casing (using jewelers screwdriver) and re powered the unit with 2 x AA batteries. Then with a length of probe wire (about 6″ long bare on both ends) I probed the mic input to the IC of the main amp and got my howling feedback (that I wanted). I probed some more for better points and found increased volume close to the vol pot.<\/p>\n

Next I powered in the iPod on a 3.5mm end to end cable. the sound was powerful, a bit high tone but that’s the speaker its coming through, but as the amp unit was face down on the table most sound I was hearing was from the back of the speaker. I slid the unit to the edge of the table and got 30% increase in volume and the tone issue reduced.<\/p>\n

I tapped and probed some more to find that the negative voltage point tapped to the positive speaker point gives me all the power I need. So all the wiring is in the battery compartment as the speaker sits under the batts. Volume control is on the iPod and the VOR part of the SONY M-750V pulls up weak signal and re balanced hot audio from the iPod.<\/p>\n

Time: 1 hour Cost: FR\u20ac\u20ac<\/p>\n","protected":false},"excerpt":{"rendered":"

I was looking for a iPod amp so I got an 1990’s Dictaphone which was unused (record mechanism broken). It didn’t amplify its external input through its built in speaker because in default mode the external input would be a better quality microphone than the built in microphone which suffers motor noise like most Dictaphones… Continue reading home made ipod amplifier<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_s2mail":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-230","post","type-post","status-publish","format-standard","hentry","category-podcasting","entry"],"_links":{"self":[{"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/posts\/230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/comments?post=230"}],"version-history":[{"count":0,"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/posts\/230\/revisions"}],"wp:attachment":[{"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/media?parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/categories?post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/briangreene.com\/bhg\/wp-json\/wp\/v2\/tags?post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}