AGC - was [Elecraft] OT-Preserving CW memories

[Hank Kohl K8DD]

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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