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The Beltron tests emissions only. That looks about right but I would like to see that at 5 volts. .8 to 1ma is good emissions.
The tube could well be gassy, yes. It needs to be tested with a tester that applies a cutoff voltage to check for the purple glow.
I have that exact Beltron and have tested at least 100 crts with it. Its very quick and covenant but thats it. I have a CR31 for true testing.
I would not buy that without seeing the cutoff.
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