[Elecraft] KPA500 Power In Digital Modes

Jim Brown jim at audiosystemsgroup.com
Tue Nov 11 02:20:04 EST 2014


On Mon,11/10/2014 4:30 PM, Joe Subich, W4TV wrote:
> *DO NOT* try running
> PSK, MFSK, etc. modes at 600W average power from a KPA-500 as you
> will be generating serious IMD and garbage. 

Recent measurements I've done of a K3 driving a KPA500 both with pink 
noise on USB and keyed CW show that not to be the case. Yes, bandwidth 
increases a few dB from 400W to 600W, but I would NOT call it serious. 
This is preliminary work and a preliminary report. At its current stage, 
it's a proof of concept.As I have time (and the radios to test), I plan 
to look at lot of others. I've just lined up a couple in the FT1000MP 
family.

P3SprectrumMeasurementsSlides.pdf

73, Jim K9YC



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