D. Chester wrote:
I wouldn't run the tube filament at half voltage. That will shorten
the tube life just as much as too much voltage.
it was just for a test, to see if the circuit was working. It probably
wasn't on more than 15 mins.
_
I wouldn't run the tube filament at half voltage. That will shorten the
tube life just as much as too much voltage.
The 6C21 is rated at some oddball filament voltage like 8.2 volts. But
that's for radar pulse modulator service. The tube is very similar to a
450TH or TL, but the filament vo
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