>
>> Now that I've gotton your input, I'm sorry to report that while tuning
>> the AL-80A on 17 meters with 500ma ip and 150 ma of ig, A somewhat loud
>and
>> most unpleasant noise ocurred within the amp after which there was no
>current
>> indicated for either ig or ip. Did I fry the tube?
>
>That's too much plate and grid current. About how long was the amp key-down
>before the bang occured?
>
? Semi-agreed. However, under full drive, the grid/cathode potential
is typically110v-peak, or 78V-rms. Grid dissipation is approx. 0.15a x
78v = 11.7w. The rated grid-dissipation is 20w.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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