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reon 22nd July 2009 12:27 PM

Precision Fidelity M8
Hi, just found one of these amps, somebody knows the bias current adjustment for this baby?, any help, schematics or service manual will be appreciated.

Thanks, Reon

giulia67 19th May 2011 07:11 PM

Reon I have one I am also looking for a manual. However. One channel on mine has a sticker from factory with a bias of 26ma idle and 76ma operate. The other channel has 16ma idle and 66ma operate. I have installed 2 rectifier bridges and 4 cerafines to make more dual mono.

llwhtt 19th May 2011 07:48 PM

I have a hand drawn schematic for this amp. I didn't draw it so don't know how accurate it is. PM me if you want it.


JAMESP123 21st April 2015 05:29 PM

precision fidelity m8
Still got that hand drawn schematic of the M8?

Thanks James

llwhtt 21st April 2015 06:15 PM

PM me with email address and I'll send it when I get home, it's on the home puter.


JAMESP123 21st April 2015 06:20 PM

precision fidelity m8


any chance of one on the precision fidelity c8?

Thanks James

llwhtt 21st April 2015 06:48 PM

Is the C8 a pre amp? If so I probably don't have it. The only reason I have the M8 is because of Andy Fuchs. About 25 years ago Andy put together an "OTL Compendium" full of OTL and hybrid schematics from all over the world. Just power amps were included.


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