No, actually not. The MP has something "like" APF, without calling it that. On CW if you turn on EDSP and set contour to 11 oclock and set NR to D and then set spot to 450, what you will get is a rounded AF response. This works well running (as opposed to search and pounce) in a contest, when you want to hear up and down a ways to catch the off-frequency callers (seemingly about 25% of world population, equals entirely common, typical tone-deaf to some degree), but don't want the entire bandwidth of noise roaring in your ear.
At this point, I have no means of duplicating that in the K3. This is NOT the same as running narrower bandwidth. If I narrow bandwidth, then I don't hear the off-frequency callers, some of which are closer to the up or down stations than me. Throwing away up and down callers easily throws away 10% of run QSO's depending on how tight you have to squeeze. This is why I have the "250" roofing filter defined as 350 with the 400 defined as 450. I will run at 450 if I can get away with it. When it gets crowded, 350 running is really as tight as I want to go, just so I can hear off-frequency callers. I just need to hear them well enough to get them in with shift or RIT. 450 with APF is having your cake and eating it too. For that matter, if Wayne sees this, a fixed to center mild NR-generated APF that came out like the MP version but with an automatic band-pass following center might be a big hit. Try the above with an MP some time and see if you can mimmick that in K3 firmware. Once discovered, it was always a favorite. That's where I got stuck on 450 Hz as a center frequency. Just got used to it. I don't hate my MP. I just wish to H* that it had a K3 style uncrushable RF IF string. Yes, APF, and sooner than later, and with a scalar adjustment to how deep it goes and the width. 73, Guy. On Sun, Oct 24, 2010 at 1:45 PM, Dick Roth, KA1OZ <raro...@comcast.net> wrote: > Seems to me that adjusting the "Pitch" to one that most comfortably > stands out from others and then using "Spot" ought to accomplish the > same thing. No? > > -- > 73, > Dick KA1OZ > Middleborough, MA > > Radio: Elecraft K3/100(Kit) SN 859 > Antenna: Titan-DX > Bruce Beford wrote: >> Sam wrote: >> >>> isn't that kind of what the CWT >>> or any cw decoding software >>> does when decoding? >> >>> GB& 73 >>> K5OAI >>> Sam Morgan >> >> Not exactly. My understanding is that an audio peaking filter actually >> boosts or accentuates the audio at a particular frequency, rather than >> attenuating those at other frequencies. It's function is to enhance one >> thing, rather than reduce other things. It's all in the semantics, I >> suppose... >> >> 73, >> Bruce N1RX >> >> >> >> >> ______________________________________________________________ >> 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 > ______________________________________________________________ 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
