Instruments for Industry model 400A / M-400A Broadband RF Amplifier

Distributed Amplifier uses six 4CX250B tubes. Whereabouts of power supply unknown, was perhaps 2KV @ 0.75A plus the customery screen, bias, and filament (6V @ 15.6A) voltages.
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Information is not available from the manufacturer, as the documents for this sweet old item were destroyed in a fire years ago. If anyone has a set of schematics and specs, I'd appreciate a copy! I think I can get this one going again. It has alot of potential!

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