>The meters were still on and the HV would still
>indicate around 3200v but the tube was completely dark.
Do you still have filament voltage? I would check that first. Perhaps
something blew in the filament supply line or something. Personally, I
haven't heard of filaments just going dark in tubes that had previously
been working fine. That's not to say it can't happen, but from what I
know of these things, emissions gradually decrease over time. Yet I
suppose like a light bulb, a filament could just open up. Is there a
switch on the AL-80 to measure filament voltage? Is it correct?
73,
Jon
KE9NA
--------------------------------------------------------------------------
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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