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1 vote
1 answer
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Suitable substitute for a hard to get IRF440 in a switched power supply?

I am repairing a HP 6023A lab power supply for a friend. The problem was that the power fets had failed. This is what the relevant schematic looks like: The incoming 120VAC or 240VAC is rectified and ...
AndersG's user avatar
  • 546
1 vote
2 answers
412 views

RS-150-12 AC Input Switch

I recently bought a MAXWELL RS-150-12 switching power supply but I can't find any documentation on how to select the ac input voltage (115V or 230V). Here is a picture of the switch: (I want to select ...
Marco's user avatar
  • 1,031