[Elecraft] [K3] Phase Noise / CW Key Clicks

[Alan Bloom]

> I was using my K3 in the vicinity
> of several other operators who were using an IC-706MkIIG, an FT-857D,
> and an IC-7000.  All of these other radios produced horrible in-band
> phase noise.  When I asked them about it, they were completely unaware
> that I was on the band!

Assuming the same synthesizer is used for the transmitter and receiver,
then phase noise should affect the receiver and transmitter equally.
Those guys using transceivers with poor phase noise should also have
been wiped out on receive, even though the interfering K3 was clean.

I suspect the problem is broadband amplitude noise generated in the
power amplifier chain.  That would affect the transmitted noise but not
the receiver performance.

Alan N1AL