> Also I know I have seen documentation at some time years
> ago which
> cautioned against this type of operation but I cannot
> remember the
> context or the tubes involved. I am pretty sure it was
> thoriated
> tungsten types but after all this time, I can't be
> positive. If I run
> across the info, I'll be sure to post it here.
Interesting, because when we would get a low emission batch
of 3CX1200's they would have us run the tubes for days
without any anode voltage or current at extra filament
voltage.
It would always bring the emission up, but once in a while
it would not "stick".
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