We just added dual-passband APF to the K4. It's very effective at higher code speeds.
73, Wayne N6KR > On Jun 22, 2020, at 10:51 AM, Roger D Johnson <[email protected]> wrote: > > Unfortunately, the APF is too narrow for 160m with all the lightning noise. > As I recall, we've been promised wider selectivity choice(s) but nothing ever > happened. > > 73, Roger > > > On 6/22/2020 12:27 PM, John Gibson wrote: >> Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m >> Elecraft CW net. Kevin in Oregon is almost 1900 miles from me in Michigan, >> and I succeed only because I have a modest tri-band beam antenna at 60 ft. >> >> Current propagation conditions make this especially challenging. Sometimes >> Kevin is so buried in noise that I find him only because I can recognize the >> rhythm of his sending. >> >> Last evening, conditions were poor. I tuned all around the net frequency and >> could hear nothing of Kevin. Then I turned on my K3's Audio Peaking Filter >> (APF), searched again, and found him, and he was loud! When I turned off the >> APF, he vanished. I did check into the net. >> >> My K3's APF made all the difference between hearing Kevin and not finding >> him. I am impressed that it worked so well. I thank Wayne N6KR for creating >> this feature for the K3. >> >> 73, >> >> John, no8v >> ______________________________________________________________ >> 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] >> > ______________________________________________________________ > 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] ______________________________________________________________ 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]
