[Elecraft] Possible phase noise question...

[David Cole]

Here is a bit more info on the issue...

If my friend moves his frequency just out of the radio passband, as
shown on the P3, the problem go away...  The base noise level drops back
down to normal...  Only when his signal is within the passband as shown
on the P3 does the base noise level rise...  I also narrowed the filter
down to eliminate his signal, and as soon as his signal movers out of
the pass band, the problem ends...

Is it just that the K3 is not dealing with his signal levels?  This
happens when he is running 5 Watts, and he is 1/2 mile from me...

-- 
Thanks and 73's,
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On Mon, 2014-06-30 at 13:39 -0700, Phil Wheeler wrote:
> No.  Can you swap to a different Signalink USB?
> 
> Phil W7OX
> 
> On 6/30/14, 12:45 PM, David Cole wrote:
> > Hi,
> > I have a friend who lives about 1/2 to 3/4 of a mile from me.  He is
> > running a 706 MK2G, at around 10 watts.
> >
> > In the past, while using a Pro III, when he came on, I was able to copy
> > and see signals using JT65, and work stations right next to him.
> >
> > After getting the K3, I believe I was able to do this as well, or
> > better...  Suddenly his signal is sprayed across the entire audio
> > spectrum to the point, I can't even tell what frequency he is on...
> >
> > I get a solid white block using WSJTx.  He and I enlisted a third
> > friend, to insure it was not just me that is seeing him as very wide.
> > The third friend lives about 4 to 5 miles from both of us, and is line
> > of site to my friend with teh 706 MK2G.  When the 706  MK2G lets loose,
> > I see the spray, but my friend does not...  He sees a nice tight signal.
> > It looks and sounds like phase noise...  However...
> >
> > If he just does a Key down for CW at 50 watts, I can copy stations right
> > next to him...  It is as if his sound card, (Signal Link with internal
> > sound card), is adding a low level hiss to the audio, I see it due to
> > proximity, and my friend does not again, because he is much further
> > away...
> >
> > This has started suddenly, and the owner of the 706 can not pin a change
> > to it...  We swapped in a different 706MK2G, and the same problem still
> > happens...
> >
> > Has anyone heard of this happening with a SignalLink sound card before?
> >
> >
> 
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