Hi Dave, Using slope 000 is likely most of your problem. With that setting all signals regardless of strength are set to the same level regardless of how loud they are coming in. If they are zero beat or close, it will mush the dickens out of the copy by making them all the same level in your ear. I set AGC SLP to 15 for contests. I also use slow AGC the entire time. If there are key clicks, I use NB with IF off and dsp to t3-7 or t2-7. It rounds off CW bauds some but does not make them uncopyable.
Make sure your ATT/PRE/RFGAIN use conforms to something like: 160m ATT plus RF gain at 2 oclock 80m ATT plus RF gain at 3 oclock 40m ATT plus RF gain fully clockwise. 20m " " 15m off plus RF gain fully clockwise. 10m PRE plus RF gain fully clockwise. 6m " " ...if you are listening on your transmit antenna. At least to start. Make sure the ambient noise on the band is moderately low audio listening on a clear frequency. Using the NB with those settings, including the ATT/PRE/RFGAIN settings. Just today I was listening to an S4 Cuban underneath what were S9/5 key clicks with the NB off. Offending station up 500 Hz at 30 over 9 (really), and was using 250 filter running at WIDTH 350. Good luck in Sprint this weekend! 73, Guy. On Fri, Feb 5, 2010 at 10:45 PM, Dave Hachadorian <k...@arrl.net> wrote: > Tonight I used a pair of K3's in the Sprint practice. Several > times I had a pileup of four or five loud stations calling me. > With AGC turned on, they were all mushed together, and I couldn't > copy any of them. > > AGC settings: > dcy soft > hld 0.2 > pls nor > slp 000 > thr 008 > f 200 > s 020 > > I tried both fast and slow agc. No joy. > > So I turned the AGC OFF. Now this introduces another problem - > the very low threshold of the AF Limiter. The AF limiter, even at > its highest setting of 030 introduces gross distortion on loud > signals. This is even worse than the mushy AGC. > > So I transfer the headphones to the speaker output, so I can > reduce the AF gain setting in an attempt to get away from the > raucous AF limiter. This works for a while, until finally one > loud signal blows out the K3's audio amplifier. This is the > second time that has happened to me. I guess I'm a slow learner > on that issue. > > Something really needs to be done here. My suggestions would to > raise the agc threshold further, and increase the slope of the > agc line (that would mean a slp setting of less than zero). The > AF limiter threshold also needs to be raised, and the AF speaker > output needs better protection. > > Dave Hachadorian, K6LL > Yuma, AZ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > . > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
