National HRO Serial Number P-352 Pre-Restoration Photographs

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National HRO "Doghouse" Model 697 Power Supply restoration

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I tried bringing the doghouse up on a variac (slowly, over a couple of months) but it's dead.  So I gave up and built a replacement power supply.  I may yet try to build a replacement supply to fit within what I can salvage of the doghouse case.

 

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