This is more than likely due to dirty signals on the TX end. I was using a QS1R connected to the K3 IF and measured the width of some of the strong signals. Some were as wide as 2.6 kHz!!!! Not very good for a CW signal. In this case there is just not much you can do.
73 Greg AB7R On Feb 22, 2009, at 4:45 PM, K2MK wrote: > I had a great time with my K3 during the ARRL DX contest. I do S&P > and I was > trolling around with my filter width at 50Hz. Absolutely > outstanding. The > auto spot is equally outstanding. > > At 50Hz width it was quite clear that many stations call off > frequency. > Using RIT, I could see that it was typical for them to be 70Hz or > more away > from the DX station but I could not hear them in my 50Hz passband. > The real > problem was when one of them was S9 or greater. They completely > swamped > weaker DX stations. Sound within the passband just blanked out. No > band > noise and no DX station. And there was no recovery between dits and > dahs. It > was actually easier to copy the DX station when people were calling > directly > on top of him. You could at least hear him between the dits. > > (Obviously if I was calling CQ instead of S&P I would have a wider > passband > and I would have just worked the stronger off frequency station). > > For my style of operating this was a disappointment. I tried AGC-F > and AGC-S > but I forgot to try AGC off. I also varied the AGC THR and AGC SLP. > I tried > NR off and on. (I was not using NB). I tried PRE and ATT off and on. > I tried > riding the RF gain. I tried shifting the passband but shift doesn't > work > well when the width is only 50Hz. Nothing helped. I also tried > opening up > the passband. That didn't help either but I don't remember the > results. > > This was not a one time thing. It happened at least 20 different > times on > different bands. I guess this is perfectly normal. I was just > wondering what > operational trick is available to compensate. > > 73, > Mike K2MK > > ______________________________________________________________ > 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 ______________________________________________________________ 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
