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Constant Voltage Variable Power Supply, homebrew. Example: Set the Variac for 120 VAC out & with no load that voltage will be maintained with as little as 25VAC input. Further testing showed that with a 2A load & 120VAC in the output voltage dropped to 90VAC so I'm selling it as-is for parts. The Powerstat appears to be working properly. Approximate size in inches 12W, 8D, 10H. Item #8976

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