Wayne:
Odds are poor contact with the filament pins on the socket. Clean them
and make sure they're plenty tight. Common problem.
The filament pins are: as you look at the socket, the two centermost side
by side pins directly across the socket from the one lone pin. Hmm,
let's try this: point the one lone pin at 12:00 o'clock, the filament
pins willl be at 5 and 7 o'clock. (Happy hour!)
Never mind...
Gary
===========================
W3AM - Gary Blau
w3am@juno.com
http://www.qsl.net/w3am/
===========================
On Tue, 7 Jul 98 07:33:07 CDT ehayes@VNET.IBM.COM writes:
>
>This past weekend my AL 80-A (1 3-500z) quietly ceased to function
>properly. I was attempting to contact the 3C5DX on 20m and
>driving the amp at around 400w output when suddenly there
>was no longer any indication of either grid or plate
>current. The meters were still on and the HV would still
>indicate around 3200v but the tube was completely dark.
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