[Elecraft] K2: KPA100 fan issue + current question

[Michael Blake]

Efficiency is an interesting point in a linear amplifier.  As the linear is “efficiency” modulated when it is driven to full power output it does in fact approach the 70% efficiency level of a class C amplifier.  Not quite but it closes in.  The 30% to 50% rating a linear amplifier normally receives is more of an average number which approximates the SSB talking power efficiency.

Very 73 - Mike - K9JRI

> On Nov 9, 2018, at 1:37 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:
> 
> Jim,
> 
> That 11 amps would sound more reasonable to me if you can say that the base K2 is being powered separately, but I would expect something closer to 50% efficiency rather than 66%.
> 
> 73,
> Don W3FPR
>