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....
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|