Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: Real or Snake Oil?? posted by amnesiac on July 30, 2012 at 04:32:00:
The CRT process raises the filament voltage in steps for about 10-12 minutes to burn off unwanted residue on the cathode. I am not sure how to perform the same on an open filament type tube. The CRT raises the 6.3 volts in steps to about a peak of 10 volts for 5 minutes.
You could try one 45 tube & slowly raise the filament voltage to 4-4.5 volts for 5 minutes & retest the tube at standard filament operating voltage. Do not test the tube at higher than specified filament voltage.
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Follow Ups
- RE: Real or Snake Oil?? - Neff 07:10:28 07/30/12 (1)
- RE: Real or Snake Oil?? - amnesiac 08:46:21 07/30/12 (0)