[Amps] rf drive

[Vic Rosenthal]

carl seyersdahl wrote:
> Here's a question I never gave any thought to in the past.
>    does the rf drive required for one amplifier tube double when using two
> tubes??

It depends.  If it's an amplifier that's totally driven by the voltage 
swing of the drive across a resistor (class AB1 or A) then the answer is 
No.  If the tube draws grid current (and therefore power is used to 
drive it), then Yes.

Now the really interesting question is: what about fed-through power in 
a g-g amplifier?  This isn't technically part of the drive power, since 
it is not consumed to drive the amplifier -- it just appears in the 
output.

Vic K2VCO