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Old 9th Nov 2019, 2:30 pm   #52
Join Date: Nov 2016
Location: Budapest, Hungary
Posts: 348
Default Re: Vintage Radio and Phonograph cutter schematic

Hello again !

I did go through again all of the components, capacitors and again a full on voltage readings.

I also put one new old stock 6v6GT in.

Sadly there is still a massive mains hum in there and some blue light appears on the 6v6 tube. Attached some pictures of all the tubes in place.

...anything I tap on this player, the side the top, all the tubes if I tap them I can hear it in the speaker and in the headphone. Just like a massive microphonic effect.. If I switch on the motor, I can hear the motor noise also in the headphone and the speaker too.

What could be wrong here? this hum is really loud and disturbing.

and now as soon as I switch it on, a fast popping sound is heard in a fast repetitive pattern and slowing down ...on the top of that massive hum .... and now is squealing like crazy when I turn the volume up !
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Last edited by Levente; 9th Nov 2019 at 2:58 pm.
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