Quote:
Originally Posted by Electronic M
Lol.
1B3s were basically the universal monochrome TV HV rectifier tube for roughly 15-20 years. Almost all monochrome sets use a 1V HV rectifier and almost all color sets use a 3V HV rectifier.
Cutoff behavior of your tester may reveal if it's gas.
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Either way it looks toast, I just hope it did not fail because of a bad flyback or if it failing damage something else.