I know a guy who has schematics for both the amp and preamp, but for no justifiable reason he stubbornly refuses to share them. *sigh* Life is too short for people to be that way.
I may be able to get a copy of the amp schematics (h1a) from someone else if you care to email me.
Hifigeek1, the phono section is nearly the same as the PAS-3. The line stage is different but very simple- just a 12AX7 with the first half direct-coupled to a cathode follower.
There is regulation in the power supply. None that has anything to do with PAS mods but its pretty straightforward.
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