Quote:
Originally Posted by dtvmcdonald
Bad thoughts. Could it be arcing in the CRT? ....
This has me worried for my 15GP22.
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It's a very real possibility, and I'd start looking for ways to rule it out.
My Great-Uncles Neil and Skip told me that the 15GP22 was a notoriously unreliable tube even when they were new. Many of them failed under warranty, costing RCA even more money, with arcing as a primary symptom. That's part (albeit a small part) of the reason that the 21AXP22 was rolled out in late 1954.
That said, I wouldn't worry too much. Tom's scenario sounds the most likely IMHO: all circuits on the +375 rail drawing excessive current with a tiny spike being the straw that breaks the camel's back.