I just finished engineering a drop in replacement amp module for the Fender Rhodes Peterson model. The original design has been bugging me for years and my buddies at the Chicago Electric Piano Co. could use a few, so here they are. I have omitted the interstage transformer because the original design is inferior to mine. This is an extremely high quality design that elegantly balances fidelity with a low parts count. This one is a lot more stable and has several protection features. It has fuses for each rail, a LED that indicates power is on, a volume control, a damping network, extra capacitive coupling, and base driver clamps (that are not installed in the photo.) I made ten for this run and they are essentially flawless.
For the most part, it is a drop in replacement that I will assemble. The TO-3 hardware is salvaged as well as the connection cable. I designed it so that I can install screw terminals, but I think soldering is safer for power designs. You can send me your heat sink ,or I can provide instructions for assembling the final components.
If anybody is interested, please let me know. I don't have a problem with wholesale inquiries. I will also entertain offers for the manufacturing rights / files / intellectual property.
-Mike