Exactly, I have noticed this too but never said anything before. It did happen a few times during the SAC CW contest that I operated, never had time to take part in CQWW CW. The radio do have a problem in this respect and I can see that 5B4AGN has found it too. Something is going on but what it is I of course do not know. The old FT1000MP had something similar and someone called it AGC IMD of course this K3 radio is a different animal.
Jim SM2EKM ------------ On 2010-12-05 17:50, Dave Hachadorian wrote: > This thread is not about copying signals that are separated by > 100 Hz. We are talking here about multiple nearly-on-frequency > callers in a pileup. In those circumstances, with most rigs, you > can separate the signals by amplitude, or slight pitch or other > CW idiosyncrasies. The K3's agc has a problem dealing with that. > Signals are compressed together, such that you can't copy anyone, > unless you reach for the rf gain control. If you turn agc OFF, > you have to deal with the crazy AF Limiter. > > > Dave Hachadorian, K6LL > Yuma, AZ > > > > > -----Original Message----- > From: Hector Padron > Sent: Sunday, December 05, 2010 9:22 AM > To: [email protected] > Subject: Re: [Elecraft] Recommended AGC settings for separation > of signalsin CW pile-ups > > Oh well,I don't like to argue anybody or disagree anybody but I > was at the contest as well and and I could easily separate CW > stations that were off between 100 200 Hz with my K3 using the > 400Hz roofer and the DSP set to 100Hz and also moving the Shift > acordingly,.no problem at all with the selectivity and also I > used the great help of the APF as well. > If it has to be with the AGC or not,these are my settings that > has been working for me in any case: > > AGC DCY.....SoFt > AGC HLD.....0.05 > AGC PLS.....OFF > AGC SLP.....0.07 > AGC THR.....007 > AGC-F.........080 > AGC-S.........020 > > To help in the RX filtering I have set my RX EQ this way: > > 0.05 at minus 16 > 0.10 at minus 16 > 0.20 at minus +0 > 0.40 at +3 > 0.80 at +3 > 1.60 at minus 16 > 2.40 at minus 16 > 3.20 at minus 16 > PITCH at 400 (I like to hear better at low pitch) > > With these settings my K3 is super selective and have no ringing > noise even at 50Hz DSP bandwiith. > In those conditions I can work any contest no matter how crowded > it will be. > > AD4C > > > > > > > > "If freedom means something,it is the right to tell others what > they don't want to hear" –George Orwell > > --- On Sun, 12/5/10, Tommy Alderman<[email protected]> > wrote: > > > From: Tommy Alderman<[email protected]> > Subject: Re: [Elecraft] Recommended AGC settings for separation > of signals in CW pile-ups > To: [email protected] > Date: Sunday, December 5, 2010, 10:47 AM > > > Bob - > > I agree with the observation about the K3's effectiveness in > separating > contest signals in big piles as that was the only thing that > irritated me > during CQWW CW contest. I have just started to try and optimize > the AGC > settings for large signal conditions and so far, I'm not anywhere > close yet. > If I can find anything useful, I will post it here. I certainly > do hope > others who may already have optimized their K3 AGC for large > signal contest, > will also post their information. > > 161, > Tom - W4BQF > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Bob > Henderson > Sent: Sunday, December 05, 2010 4:39 AM > To: [email protected] > Subject: [Elecraft] Recommended AGC settings for separation of > signals in CW > pile-ups > > CQ WW CW is now over. We used K3s at P3F this year. While > performance was > generally considered good, some questions were raised over the > effectiveness > of the K3 in separating signals in large piles. > > Similar concerns appear to have surfaced from other users > including the guys > at 9L5VT and C6ATA. Anecdotal evidence suggests the old TS930 > and TS850 > performed better in such circumstances. I suspect the AGC > systems of the > K3s used had not optimised. > > Has collective experience of the K3 contesting community derived > optimum > settings for the K3 AGC system in this kind of situation? > > Thanks > > Bob, 5B4AGN ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
