[Amps] 8877 filament.

[Thomas Walsh]

And the blower would still need to be on as well, to keep from
heat damaging the tube, it will still get hot. Never power a
filament with no forced air! Even reduced filament voltage..

Sent from my iPad

> On May 4, 2017, at 12:46, Randall, Randy <Randy.Randall at UCHealth.com> wrote:
> 
> I wonder how much the warmup delay would be shortened if the filament was run at, say, 3 V on a 24/7 basis, and then increased to 5V when the amplifier was powered up