Hello again,
>I have cooked the filaments for 1.5 hours at 15% over voltage and picked
>up about 50W per tube. Do I dare leave the over voltage run overnight,
etc
>or go higher in voltage, or what ???
>
:15% over-Voltage cuts the emissive life to under 1%, Carl If a pair of
:good tubes brings the output up to what you consider normal, maybe it's
:Trash time?
Just thought I'd mention that old tired tubes work great as repair
process place holders. If I'm repairing a larger amplifier that had a
power supply meltdown, I install the tired tube(s) to bring the amp back
up the first time. Tubes are getting to expensive to try a new set in an
amp that has any question of proper power supply operation.
Some of them also make good door stops. I use a 4cx10000 as a door stop
as it's to badly damaged to rebuild.
cheers
skipp may wv6f
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