[Elecraft] KPA-500 "Output for Input" schedule?

[James Maynard]

On 2011-05-11 10:16 AM, Don Wilhelm wrote:
>    Stan,
>
> Of course it can be driven by lower power.  The KPA500 is a linear
> amplifier.  If 40 watts in produces 500 out, then 20 in will give 250
> out and 10 in will produce 125 watts.  If the relationship is otherwise,
> then it is not acting as a linear amplifier.  The same thing should be
> true for any linear amplifier - that is the definition of linear operation.
>
> 73,
> Don W3FPR
Um, linear with respect to power, or linear with respect to voltage? 
Assuming a resistive load, P = I*I*R, or E*E/R.  I *think* a "linear 
amplifier" means linear with respect to voltage (or current).

If I'm wrong, I expect that I will be promptly corrected!

Jim K7KK