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RE: General tube amp restoration question

Posted by sony6060 (A) on November 21, 2016 at 08:36:25

In Reply to: General tube amp restoration question posted by airtime on November 19, 2016 at 07:13:58:

1- First focus is installing good sounding audio coupling caps.
2- Next are using best sounding tubes.
3- Finally, a well filtered power supply. Also, a solid-state rectifier is used, remove the 1N4007s or similar voltage rectifiers and install low noise UF4007.

A funny thing. I used to restore Fisher 400, 500 & 800. (I have one more left to restore, but only rebuilt one this year).

The big guys, that is, well known rebuilders paid no attention to my list above. They build reliable units, but they did not sound good. The power supplies from these rebuilders had 25 volts ripple to the power tubes and no poly type cap filter on the voltage doubler output. What a crime just for starters.

And, they think they have a premium rebuild- how disgusting. They did everything to knock down my rebuilds including getting me kicked off of Audiokarma. I was taking a huge share of their work. AA is at least 15 years ahead of Audiokarma design wise anyways. I work as a GM Rep now.

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