Quote:
Originally Posted by ctc17
So far I have had a 6GH8, 6JE6 and 21FJ crack and go to air after returning a retired set to service. None of these tubes were being touched, they just went to air while the set was off after I started using the set again.
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I suppose Glass ages just like anything else, maybe after 50 or 60 years minor flaws become fatal flaws.