[Amps] Should a blower run after amp shutdown?

[Jim Tonne]

The filaments are ramped UP as well as down.
The time is a few minutes for tubes of that size.

The control ladder is kind of huge; before you
can turn on the filaments you have to confirm
that airflow is present.  And so on.  A subtle
thing here is that screen voltage is derived
from plate voltage so that if plate voltage drops
for any reason screen voltage also drops.

etc.

- Jim W4ENE


>>>  With drive, screen, and HV removed, the bias supply can be removed, and 
>>> filament
>>>  ramp-down can occur.

> ####  Notice how he  ramps  down the fil V....