ARC SP3 schematic

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Can anyone tell me where to find a schematic for the Audio Research SP3A preamp? Is anything on the Web, or does ARC sell them?
I am trying to track down some hum in the line section (its not the phono as the hum level does not change with volume setting.) Also changing tubes, cables etc. has no effect. It is not the amp (hum goes away with shorting plugs in amp.) I am thinking a power supply cap may be going, but need to see if that could only affect the line stage (separate supplies for line and phono?)

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

Topic - ARC SP3 schematic - JJ Analog 11:12:01 09/19/02 (6)

Re: ARC SP3 schematic - Grainger49 19:09:09 09/19/02 (2)

Re: ARC SP3 schematic - JJ Analog 22:54:47 09/19/02 (1)

Re: ARC SP3 schematic - JJ Analog 11:10:20 09/20/02 (0)

Re: ARC SP3 schematic - ruffscruff 15:20:46 09/19/02 (0)

Re: ARC SP3 schematic - Tim P 12:41:49 09/19/02 (1)

Thanks<nt> - JJ Analog 14:19:13 09/19/02 (0)

You can not post to an archived thread.