Sure, you are right, but you would not deny that using same set of parameters (NR/NB, WIDTH, PITCH, RF, etc) the APF circa 4.17 and 4.22 should give very similar results since the code of APF remains the same. After playing few days with 4.22 I find myself having to turn off APF to better receive weak CW stations. I don't have explanation for this. With APF on I find it difficult to distinguish dits and dahs of weak signals. With 4.17 it was much better for me. That should be apples-to apples comparison, I think. I don't claim to be expert though, listening is very subjective IMHO.
Regards, Igor, N1YX -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of wb6r...@mac.com Sent: Wednesday, November 17, 2010 3:10 PM To: Elecraft Reflector Subject: [Elecraft] K3 APF Effectiveness There are many variables at work with regard to judging the effectiveness of the K3 APF. In addition to the discussions of noise and careful tuning, there are user preferences to consider: 1) Headphones vs speakers 2) Enhancing a weak signal to "pop up" that would otherwise be copyable with adjustment of NR, NB, bandwidth/shift and/or the use of diversity RX. 3) Enhancing a truly weak signal that would otherwise be impossible to copy. When commenting on the effectiveness of the APF, it would be useful to know what other of the K3's tools are in use and how they are adjusted. 73 - Steve WB6RSE ______________________________________________________________ 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
