In Reply to: Testing used X-ray tubes posted by Mike Gray on 03/29/00 at 1:22 PM:
When I was at Bertan High Voltage, I designed the XR-50A x-ray tube power supply. The tube which occupied my attention back then was, I think, the Amperex RI-50P which was a fixed anode device with filamentary control of anode current.
Since the XR-50A actually had closed loop feedback which used the tube's filament current to control the anode current, the supply's panel meters made it a really convenient tube tester! We were easily able to trace the tube's characterisitc curve.
The XR-50A (now superceded by the XR-50B, I think) made a dandy test set to determine what the curve of a tube really was, even if published specifications weren't accessible.
John Dunn - President