5150/5151 Video Card??

Of course. But the PSU in that Zenith monitor only has one output -- +12V. And there is no regulation feedback loop to the chopper stage. On multi-output switchers often the main out has a much higher power limit than the others. Perhaps 5V at 60A and +/-12V at a couple of amps In which case it is not unreasonable to use linear regulators for the latter, the power wasted is not that much. As an aside, there is at least one DEC printer (LA324 I think) where the main output from the SMPSU is the 36V one (that is the one that is sensed to regulate the chopper), used for the motors, printhead, etc. The 5V rail (used for the logic, of course) comes off a linear regulator. One to watch for... You can of course do it with older technology too. The PDP11/44 PSU and the HP9845 PSU spring to mind. A lot of ICs, chopper transistors, etc in there. -tony