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

[Joe Subich, W4TV]

> Um, linear with respect to power, or linear with respect to voltage?

Linear with respect to power.  Both the input and output are fixed Z
thus an increase in drive results in increases in both the current
and voltage variation which given a linear amplifier causes increases
in both current and voltage swings at the output.

73,

    ... Joe, W4TV


On 5/11/2011 1:27 PM, James Maynard wrote:
> 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
>
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