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

[ab2tc]

Hi,

Agreed on both points. Others have pointed out that wideband noise on
transmit is often much higher than the phase noise produced by the
synthesizer. My neighbor (3 doors = 240' away) is a good example of noise
produced by the transmit amplifiers rather than the synthesizer. He uses
mostly CW and his IC-756 has strong wideband noise even with key up (I am
sure he does nut run full QSK). The key up noise must be produced by his
amplifier chain, not the synth. It of course also completely rules out noise
from my synthesizer as the cause.

AB2TC - Knut


Alan Bloom wrote
> 
> <snip>
> 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
> 
> 
> <snip again>
> 




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