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In Reply to: RE: Look what I founded in your attic Mommy. posted by Triode_Kingdom on August 14, 2016 at 08:37:15
If you have a way to run them the gassy tubes will be fine after a good run in. But don't use ANY of the 6P3S-Es unless you test them thoroughly, especially for grid current/gas.
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Jim, I used a test amp for grading, roughly +400V on the anodes. As you say, a number of slightly gassy tubes were fine after running them in for 10 to 15 minutes. The ones I sent back were those in which quiescent current started out higher and never fell to an acceptable level.
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Buy Chinese. Bury freedom.
Wow, that's surprising that they didn't come down. Thanks much for the clarification.
Just FYI I ran mine at 465 volts on the plate and screen and -50 on the grid which usually resulted in cathode currents of about 25 to about 50 ma. They ran for multiple hours...
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