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that's what I did to the cracked 10fp4-spread silicone over the cracks, and wrapped it tight in electrical tape. I could see how getting it sealed and running the filament would get the few air molecules moving enough to be gathered up by the getter-if there is any of it left.
Potentially you could have a perfectly good cathode still. The crack may have gotten onto your tube when someone carelessly bumped the back of the set against the wall, since the tip of the neck tends to stick out of the backs of many sets. Don't ask if this has happened to any of us!
Last edited by leadlike; 07-19-2010 at 07:54 PM.
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