>
>Are these tubes delicate? The local radio club has a 2m amp with one; the
>standing current has dropped by a half, and the RF output is way down.
>Suspicion is that it got over driven: the amp has no protection. Are they
>easy to damage by overdrive?
>
? For FM service, the rated max. cathode current is 0.6A. Anything
more than that might cause cathode flaking. To see if there's any
flaking, one can use a high-pot. to measure the leakage potential from
grid to cath. My guess is that it should be at least 1kV at 2uA. //
note: While the high-pot is out, I would also measure leakage from
anode to grid @ 5kV using pos. and neg. polarities.
- later, Peter
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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