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In Reply to: RE: How long did you run them in before hitting them with high voltage? posted by benie on February 24, 2017 at 19:05:27
I had only one failure. It was a Taylor glob, and I ran heater power for an hour. When I ran AC through it, cathode coating would get blown off in little sparks. Not sure what had happened; by the time an hour was up, the bottom of the envelope was goated in Hg, and the rest of the glass was clear...
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Follow Ups:
I have had a number of rectifiers that the cathode coating came off. But they still worked well afterwards. I have a number of 249C tubes like this.
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