Quote:
Originally Posted by Robert Grant
Question about testing a CRT in unknown condition:
If a CRT has gone to air, but nobody has powered the filament since before the vacuum was lost, could such a CRT be restored to operation by re-evacuating the tube, without have to do a total rebuild (assuming any leak would be extremely slow or could be found and closed)?
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My understanding of it is no, once the cathode has been activated exposure to air destroys it.
I'm sure someone who really knows the answer to this will chime in.
