Posted by manualblock [ 69.112.43.172 ] on March 14, 2006 at 07:42:09:

In Reply to: Re: Vintage Fisher Amp posted by Peter S on March 11, 2006 at 23:34:17:

I have an idea but you may not like it. Inside there are only a few things that cause problems. Barring something like a transformer failure the only things you need to replace are all the electrolytic caps, critical resistors,ie grid or bias and possibly the coupling caps.
The thing is these am,ps were so well designed and used such good quality parts that you will not really get a better sound with newer type passive parts. Even carefully matched carbon-comp resistors will sound better than the newer metal-film.
What I see most guys doing now is leaving the equipment alone; replacing the caps I mentioned and re-tubing the amp as well as repairing any minor problems should get you some of the most musical sound money can buy. The design is great on that unit and it pumps more power than you will ever need. Clean it up and have a good tech go through the amp with a scope to make sure there are no problems and then sit back and enjoy.
Lot of times people replace everything with new expensive parts and end up selling the unit because it sounds worse.

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