I have a newly acquired used HP6654A-J10 supply. None of the information I have found on line indicates the existence of the J10 variant for the case of the 6654. What is it?
The front panel is labeled 60V/9A and it programs as an 80V/6A unit but there's more. It has a small added circuit board mounted to the interior wall of the power cage that is partially populated with a single OP27 and circuitry. It also does not have any electrolytics bypassing the output terminals (low stored energy?).
Is there a service revision document showing the changes?