[Amps] Ameritron (et. al.) filament voltages

[k7fm]

> We have a local pilot who does runups the same way.  We all try not to
> get behind that plane when it's headed down the taxiway because we know
> we'll be sitting at the hold line for a very long time.

I would not even think of flying a helicopter until it warmed up the 
prescribed time according to the operator handbook - which is virtually at 
close to full power for a few minutes.  I want it to fail on the ramp - if 
it is going to fail.  I do the same with my fixed wing aircraft.  The 
amplifier is a bit different, though, since you can have the amplifier out 
of resonance or unloaded.

I would not want to operate my fixed wing aircraft at full power without the 
prop on.

73,  Colin  K7FM