>Just how good is the vacuum in the tubes?
For ham sized tubes, anything over 10uA at 2x the rated anode voltage
would give me worry.
>Are ceramic tubes at the same
>vacuum level as the glass envelope tubes?
>
they seem to be pretty much the same. For ceramic tubes, it's not a bad
idea to test with both polarities. If the leakage decreases with neg.
polarity, the leakage is not due to oxygen and nitrogen.
Rich...
R. L. Measures, 805-386-3734, AG6K
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