Tube rejuvenation?

[LeftyStrat]

Anyone ever try this:

http://www.antiquewireless.org/otb/rejuve.htm

[Reeltarded]

Not with tubes, no. There are some NiCads I have done this to with some amazing and dangerous results! Not all dangerous, and some fairly amazing.

I am terrified of electricty and explosions and metal things that melt and.. I am scared of pretty much anything.

[Cliff Schecht]

I was under the impression that this only worked on directly heated thoriated tungsten tube types. I've heard success stories with 300B's and the like but I'm not sure about modern indirectly heated cathode types. With the thoriated tungsten filaments you apply enough overvoltage to essentially boil off the impurities and then bring the voltage down to a bit over nominal and run it for a few hours to allow the tungsten to diffuse on the filaments surface.

[Prairie Dawg]

When you've got a tube that's a weak sister and is ready to be thrown in the trash anyway, it's worth a try. I pepped up a few Amperex Bugle Boy 12AX7s that way-I also cooked a few.