I agree Bill, using a narrower DSP width or shifting the PBT is what I use to push out an offending CW signal. I do use the notch filter (manual) when I want to listen to CW with a wider DSP filter and eliminate a BC carrier. I find that it works great in that situation.
I usually work the novice ends of the CW segments, and there aren't as many CW sigs out there to contend with, but the BC stations pop in and out at different times of the day. Most of the time, I like to listen with a wider filter setting and notching out the BC carriers works really well for me, YMMV. With close in CW signals, pulling the DSP filter in and/or shifting the PBT usually works well for me even with sigs only a couple of hundred Hz away. At this point, I am no contester - only a casual op, so again, YMMV. 73, Dave W8FGU > > Ian Greenshields wrote: > > >Is there a reason why the auto-notch has to be disabled on CW? > > Already answered (i.e. sometimes it could eliminate the desired signal!) > > >There are many times when it is highly desirable to notch strong CW > signals or carriers whilst trying to listen to a weaker DX signal > underneath, but usually at a different pitch. > > The problem is that the K3's Manual Notch is relatively wide. An > interfering signal must be >100 Hz away before Notch doesn't attenuate the > desired signal (this per some plots N1EU sent me). For this reason, > you're > much better off using narrow DSP Width (<200 Hz) which is also easier to > set > up quickly versus the Manual Notch. Another option is to use PBT to shift > the DSP filter to eliminate the interfering signal. BTW Orion even has a > much narrower Notch than the K3 but I seldom used it instead of simply > narrowing DSP Width. > > 73, Bill W4ZV > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
