Oh, forgot to mention that the sticker on the control head itself (the "Controller-Amplifier" says "Type C-594A-1 (28V)" on it, S/N 127. It also has the following numbers on it:
20405-5 (top circuit board)
29610-0028 (top circuit board)
ARC 29407-4 (bottom circuit board)
29611-0028 (bottom circuit board)
(I don't know what's in between the circuit boards.)
I did check the connectors, pins, sockets to make sure things were making contact, etc. for the 3 plugs that plug into the back.
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