4 ms·

This might not be as easy or practical as it sounds. Replacing an existing power supply that is known to match the requirements of the system with one that wa

This might not be as easy or practical as it sounds. Replacing an existing power supply that is known to match the requirements of the system with one that was cobbled together from modern components is inherently risky. You're either building something brand new and un-tested or hacking an existing supply to fit a job it wasn't designed for. If the original is reasonably intact and can be verified, it would be simpler and safer to repair it and know the supply matches exactly.

walrus01 10y ago
The original post shows that it needs +15V, -15V, +5V and -5V. This could be implemented with four separate high quality active PFC modern power supplies tuned to the right voltages. One thing that's unknown is what the load is for the whole thing, so it'd be necessary to somewhat deliberately oversize the power supplies, but it's not hard to find 700W rated power supplies that will do 15V. Any modern power supply will be safer and more reliable. If there's any doubt about the pinout and cabling arrangement of the old power supplies, it's totally possible to pull the old power supply, repair it as best as possible with new capacitors, power it up on a test bench and probe it to see exactly what its output is. Then match that on a new cable harness with a new power supply. It's not "hacking" to provide +15V or -15V , that's within the range of many good quality tunable 12V power supplies.
- DanBC 10y ago
  You don't even need to tune a 12v supply. +15v -15v is a reasonably standard part.
  - walrus01 10y ago
    True, though there's a much greater selection of really high quality (medical grade, even!) active PFC 12V power supplies that will tune to 15V. Some of them even come in specific 15V versions like a Meanwell RSP-750-15: http://www.meanwell.com/mw_search/RSP-750/RSP-750-spec.pdf http://www.meanwell.com/mw_search/RSP-750/RSP-750-spec.pdf

walrus01 10y ago

The original post shows that it needs +15V, -15V, +5V and -5V. This could be implemented with four separate high quality active PFC modern power supplies tuned to the right voltages. One thing that's unknown is what the load is for the whole thing, so it'd be necessary to somewhat deliberately oversize the power supplies, but it's not hard to find 700W rated power supplies that will do 15V. Any modern power supply will be safer and more reliable. If there's any doubt about the pinout and cabling arrangement of the old power supplies, it's totally possible to pull the old power supply, repair it as best as possible with new capacitors, power it up on a test bench and probe it to see exactly what its output is. Then match that on a new cable harness with a new power supply. It's not "hacking" to provide +15V or -15V , that's within the range of many good quality tunable 12V power supplies.

DanBC 10y ago
You don't even need to tune a 12v supply. +15v -15v is a reasonably standard part.
- walrus01 10y ago
  True, though there's a much greater selection of really high quality (medical grade, even!) active PFC 12V power supplies that will tune to 15V. Some of them even come in specific 15V versions like a Meanwell RSP-750-15: http://www.meanwell.com/mw_search/RSP-750/RSP-750-spec.pdf http://www.meanwell.com/mw_search/RSP-750/RSP-750-spec.pdf