>
>Wayne:
>
>Odds are poor contact with the filament pins on the socket. Clean them
>and make sure they're plenty tight. Common problem.
>
To increase tightness, remove the helper springs on the filament contacts
and bend them for a bit more pressure. Or, make a second helper spring
out of austenetic steel and piggyback the orig. spring. Or, buy a
replacement TL-922 tube socket - which is the best I have ever seen.
>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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>
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
--
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Administrative requests: amps-REQUEST@contesting.com
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