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Hoffman Amps Forum image Author Topic: Acoustic 165           &n  (Read 3485 times)

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Offline Geezer

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Acoustic 165           &n
« on: June 17, 2005, 09:45:56 pm »

  Hoffman Amplifiers
    > Tube Amp Building - Tweaks - Repairs
        > Acoustic 165      
 
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mojogroff
Junior tube assistant
Posts: 49
(3/3/04 8:35 am)
 Acoustic 165
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 Anybody out there familiar with an Acoustic 165. I'm trying to revive one for a friend. The amp hasn't been used in several years. I replaced the fuse holder and got sound but the amp sounds horrible. I plan to replace all of the filter caps. But I'm not finding the exact replacements what should I use in place of a 60mfd/350v. I'm not sure what the caps do because I'm not that versed in amps with circuit boards.

Also, should I replace the Mallory 40mfd/500v, 40mfd/500v cap cans. They are twist lock type and I can't find a direct replacement for them. Should I change to a clamp type can like a Marshall.

Thanks for any help
 
Platefire
Guest comedian
Posts: 623
(3/3/04 12:42 pm)
 Re: Acoustic 165
--------------------------------------------------------------------------------
 Hay mojo

Isn't all Acoustic Amps solid state??? This is mostly a all tube
amp forum. On older tube amps instead of replacing the can we usually install idividual filter caps in a clear available space
on terminal strips or build a small board for them. If you
look at Dougs info on this site he gives you several ways to do
that. Plate
 

Edited by: Platefire at: 3/3/04 12:43 pm
 
mojogroff
Junior tube assistant
Posts: 50
(3/3/04 3:01 pm)
 Re: Acoustic 165
--------------------------------------------------------------------------------
 This amp is tube with a switchable FET preamp..which I know nothing about..I believe the amp to be a mesa boogie clone built around 1980
 
stan buczko
Junior tube assistant
Posts: 69
(3/3/04 10:36 pm)
 Re: Acoustic 165
--------------------------------------------------------------------------------
 Yes!! PC fun.
I have a model 160 which is just the head. They were killer amps in their time. I replaced all of the electrolytic caps in mine last year. For the 60mf/350vdc i used a 100uf/350vdc. I also went with the 50uf50uf/500vdc cans with clamp brackets for the 40uf/450vdc caps. Good luck Stan
 
mojogroff
Junior tube assistant
Posts: 51
(3/4/04 8:11 am)
 Re: Acoustic 165
--------------------------------------------------------------------------------
 Thanks Stan!!
 
 
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