[Elecraft] KPA500 Power In Digital Modes

[Jim Brown]

On Wed,11/19/2014 3:50 AM, Ken wrote:
> On Nov 10, 2014, at 7:30 PM, Joe Subich, W4TV wrote:
>
>> >Depending on the crest factor (peak to average ratio) of the mode
>> >in use, the average power from the KPA-5000 should be kept 6 to 10
>> >dB below the rated maximum (e.g., 60 to 150 watts) just as a 100W
>> >transceiver should be kept between 10 and 25 watts average.

Joe made this statement assuming that the KPA500 produced FAR more 
distortion than it actually does. A few days later, I showed 
measurements with a K3 driving a KPA500 to 500W with PSK31 showing that 
the distortion was EXTREMELY low. I had already published comparable 
measurements for CW and SSB, with the same result.

P3SpectrumMeasurementsSlides.pdf

73, Jim K9YC