Hi Jim,
I understand that tube life is dependend on their vacuum and on the emission
from the cathode such that material of it disappears until worn, and then
the tube is probably send in for a new coating.
How does ?the clock tick? when just the heater is lit and no current flows?
73, Peter
________________________________
From: ham_amplifiers@... [mailto:ham_amplifiers@...]
On Behalf Of pentalab
Always remember.... when the fil is lit...'the clock is ticking'.
