I was at VO2AAA in Labrador City for CQ WW CW with K2/100 #850 and an
AL-1200. We were next to a residential area with a very high line noise
and precipitation static.
On 80 and 160 meters with the AF gain about 3/4 way up and riding the RF
gain and DSP with noise reduction made some of the second & third tier
stations copyable. Sometimes you have to be really fast on reducing the
RF gain to save your ears!
I don't really like the "sound" that I get out of my K2 with the DSP, but
when you are digging stations out of the noise the NR and the DSP filter #1
really helped.
The K2 as the run station was good for about 3000 Q's, the mult station for
a couple hundred. And 3.4M points. Think I remember working a couple
calls from this list!
73 Hank K8DD
At 12/11/2004 07:45 PM, W3FPR - Don Wilhelm wrote:
Ron and all,
Are you aware that reducing the RF gain will reduce the AGC action as
well. Folks who want to try it may be surprised how well copy can be made
under QRM conditions with the AF gain at full and the overall gain
controlled by the RF gain.
With this technique, the residual AGC provides some 'limiting' protection
for the ears while allowing one to dig for really weak signals - this is
applicable at any bandwidth, but more so for wider ones.
73,
Don W3FPR
----- Original Message -----
To this day I still prefer a wide filter, even with moderate QRM. With my K2
on CW, I use the SSB filter more than any other. I love being able to keep
track of what's going on around the frequency I'm using. The trick of
course, is to turn off the AGC so stronger signals in the passband won't
depress the receiver gain. One of these days I'll add a hard limiter to
protect my ears. The dynamic range of the K2 allows really huge peaks to
come through without the AGC.
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