27 Jul
2007
27 Jul
'07
9:15 p.m.
dwight elvey wrote:
Hi
I have soem tubes made in the 1920's that still have a
good vacuum. How much longer should I wait.
Well all I know is apply filament
voltage slowly with no high voltage
to let the getter heat up and work.
Dwight
Hopefully you'l^H^H^H^Htube live a
good 90 years more.
PS. Only who in 90 years will remember ^H