> weird that it has two AC inputs > I wonder if it's actually two supplies in a single package
Probably not applicable to this PSU, but I've worked on SMPUs where there were separate AC Inputs for the power supply for the internal control circuitry (often feeding a little linear PSU in the unit) and for the main rectifier/smoothing caps/chopper. It was done for ease of servicing (they actually cared about such things back then) You could power up the control circuits and check waveforms. etc without any risk to the choppers, then power up the chopper circuit from a current-limited supply so that if anything went wrong the damage would be minimised (no traces blown off the PCB, etc). HP certainly did this in the PSU for the HP2100A mini. -tony
