You can mitigate that problem somewhat by listening to the DX on the wide sub and the pileup with the narrow main rx. If the split is (roughly) larger than the filter bandwidth difference, then loud, continuous callers in the pile don't bother the DX signal, only your ability to locate the weak caller in the strong pile. That being said, I put a narrow filter in both receivers.
The unconventional technique of listening to the DX on the sub and the pileup on the main has another benefit - you don't have to use SPLIT mode which degrades keying at high speed and disables QRQ mode. It took me a while to get used to it after decades of doing it the other way, but I think the benefits outweigh the change in my cage. 73, /Rick N6XI On Mon, May 12, 2014 at 2:49 PM, Vic Rosenthal K2VCO <[email protected]>wrote: > My K3 was originally set up this way, 400 Hz in the main and 2.8 kHz in > the sub. > > When working DX pileups with the main on the DX and the sub on the pileup, > I definitely noticed the 'pumping' effect on the sub only. It was sometimes > annoying when the DX was working a weak caller and the usual loud idiots > were continuing to call. > > > On 5/12/2014 12:54 PM, Dauer, Edward wrote: > >> I would be interested in knowing if anyone has done an empirical test and >> observed the difference directly. Specifically, since the sub receiver is >> identical to the main receiver in every way, if someone has a K3 with, for >> example, a 400 Hz filter in the main but only a wider set in the sub, and >> then set the DSP bandwidth on both receivers to 200 Hz or so, what >> differences they actually noticed. I have no doubt the theory and the >> engineering are sound - just curious what the difference sounds like in >> the field . . . >> >> Ted, KN1CBR >> > > -- > 73, > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > > > ______________________________________________________________ > 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 > Message delivered to [email protected] > -- Rick Tavan N6XI Truckee, CA ______________________________________________________________ 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 Message delivered to [email protected]
