I also had this problem recently:  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!

The other stations were at least 100 meters away and using opposite
polarization from me on 20 meters.  The noise floor increased from S0
to S3-S4 with the 706 and 857, which were farther away and S0 to S7ish
with the 7000 which was much closer.

Of course, this was one of the many selling points of the K3 for me.
I guess the K2 is also very clean on TX phase noise?

73,

--Ethan, K8GU/4.

On Thu, Sep 13, 2012 at 11:00 AM, Geoffrey Mackenzie-Kennedy
<lx...@pt.lu> wrote:
> Hello Matt,
>
> Interesting that the other stations whose phase noise pestered you, did not
> sense the presence of the K3's strong signal as the result of reciprocal
> mixing in their receivers.  Can you recall the model or models of
> transceiver the others were using?
>
> 73,
> Geoff
> LX2AO
>
>
> On September 13, 2012 at 6:18 AM, Matt Zilmer wrote:
>
>
> <snip>
>
>> Now - I KNEW better, but I went around to the other stations when they
>> were operating on same bands as the CW station (Dave at the key, were
>> at the computer).  They weren't hearing us AT ALL and didn't even know
>> we were on the same band!  Except for our roving spotter with a
>> broadband panadapter who could see my K3 but not hear it.  No key
>> clicks from us, but of course you could hear them all over the band(s)
>> from remote stations.
>
> <snip>
>
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-- 
http://www.k8gu.com/
Repair.  Re-use.  Re-purpose.  Recycle.
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