[Elecraft] KPA500

[Jim Brown]

On 9/6/2011 1:31 AM, Jon K Hellan wrote:
> Excellent, but then why limit it to 500 W in low duty cycle modes?
> Shouldn't it be capable of more? Are the intermod issues?

500W is a published minimum performance spec, not a hard limit.  The 
actual limit is somewhat variable, depending on the efficiency of the 
output stage. My KPA500 gives me  550W out on 6M in keydown modes, 
slightly more on CW and SSB; and 650-675W on the HF bands in all modes. 
Firmware control limits the output to about 700W, a limit that was 
chosen on the basis of IMD performance and device longevity.

73, Jim K9YC