[Elecraft] Regarding KX3 with KPA1500.

[Jim Brown]

On 3/12/2023 3:37 PM, Steve L wrote:
> Recently I ran across several video presentations by Rob Sherwood NC0B, regarding today’s (and yesterday’s) transceivers.  To my surprise, he sifts his focus from receiver performance testing (for which he is famous for) to transmitter cleanliness.  He gives a number of real examples of the mess output by some of today’s top transceivers and amplifiers as well as the RF mess created by amplifying marginal QRP radios by certain amplifiers.
> 
> I had not considered this before when thinking about the purchase of a new-to-me synthesized radio - and there are some significant and surprising differences!

It's wonderful to see Rob working on this, but he is pretty late to the 
party. Elecraft engineer K6XX and I gave this talk to local contest 
clubs in 2013  http://k9yc.com/K6XXAmpTalk.pdf

I published this report, analyzing the results of ARRL Labs testing in 
2014.  http://k9yc.com/TXNoise.pdf

Six months later, I published my own measurements of my rigs and amps, 
and of rigs I'd borrowed from neighbors, including two problematic Yaesu 
rigs.

All have been on my website since then.

73, Jim K9YC