Sam,
I doubt the K3's front end is being overloaded. Since you're observing
this in peak-hold mode on the P3, start at the *top* of the pedestal and
note how wide the signal is. Then, move down the pedestal to where the
signal begins to widen out. How far down do you get before it begins to
get significantly wider? If it's about 30 to 35 dBm below the maximum
signal level, then you're probably hearing and seeing fairly typical
(unfortunately) ssb transmission artifacts.
That S9+40 signal, will start to broaden out at probably around S9+5 or
so, and the S9+60 signal will probably begin to broaden out at S9+25.
Additionally, if they are over driving their amplifiers, the point at
which their signal begins to widen could be higher than this. Six
S-Units is 36 dB. If this signal was right at S9 (rather than S9++), the
signal would likely begin to broaden at about the S3 level -- which on
80m may actually be below your noise floor -- so you'd never see it.
You may want to consider using a device like the DX Engineering NCC-1,
which can do a superb job of cancelling local noise sources. I would
suspect that it would also do an excellent job of significantly reducing
the level of these signals (though not both at the same time).
73, Dale WA8SRA
On 2/28/2013 10:46 PM, Sam Morgan wrote:
I have a couple of hams living .7miles and 1.3 miles from me.
On my P3 they both appear 6-8+ kc wide when viewed using the Peak
function.
They both run different amps varying in power from 400w to 800w
I have spoken with them over the phone and while watching their signals
they are able to cut down their audio to where they are only 3kc wide.
One is still bumping S9 +40 and the other S9 +60 on the K3.
They seem to think their audio is to low at that point,
even though they are still given good reports out 300-600mi (on 80m)
My question(s)
they seem to think the only reason they appear that wide is because
they are over powering my K3s front end. I think they are over driving
their rigs audio.
any comments on what could be happening here?
Is it my K3/P3's fault they look that wide,
or are they just wanting to see their meters swing up higher than they
should,
and so are actually over driving their rigs?
TIA
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