Looking for a Schematic for the Aphex 661 tube expressor

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mmatrix

Well-known member
Joined
Sep 19, 2005
Messages
62
Location
Pennsylvania, USA
Just got a used Aphex 661 tube expressor that someone tried to recap and totally screwed up, including cooking the rectifiers and the voltage regulators.  So they replaced the rectifiers and regulators with other parts and tried to "make them work" (jump soldering, not using the traces, drilling holes in the pcb, etc.)  It's a mess.  Does anyone have the 661 schematic so I can get this back to spec and get it up and running?  Thanks a lot.
 
I have the schematic for the 651.  The power supply (where the main issue is) is different (for running the tube and the +/-15VDC). There are some other small differences too, like a 12V relay, "auto" function circuit, etc.
 

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