National HRO Serial Number P-352 Pre-Restoration Photographs

Click on a thumbnail photo to see a high-resolution image




National HRO "Doghouse" Model 697 Power Supply restoration

Click on a thumbnail image to see a larger picture

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.


N4TRB Home Page