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Smps-old USP&T supply bd mods + info on M51957 ic.

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Howard

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Hi Im an old engineer at the end of a long copper trail in New Zealand,-no speed at all, cannot access sites with lots of graphics. Have a project to modify pc power supplies to power other projects. Have bought 20 identical US Power and Technology RP2 Rev A units, all okay, but would find a circuit diagram very helpfull. Any ideas? USP&T went toes up 3 years ago. Has a Mitsubishi M51957A 5-pin sip on board, cannot source any info. Anyone done something like this before? First project to use this would be direct drive vacuum tube ESL amplifier. Ta, Howard.
 
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