Wayne, This may be entirely dependent on signal level vs. AGC threshold.
Prior to MCU 4.5x APF was generally working with signals that had already activated the AGC thus the peaking occurred above the threshold/slope. With the higher threshold, the noise is not held to a well defined level so the effect of the APF may not be as pronounced for signals below the threshold. The same issues are probably involved with the perceived CW decode issues. It is no longer sufficient to simply set threshold to auto and turn on decode. Now it can require some tweaking of the decode threshold as well as frequency and bandwidth to get good decoding. 73, ... Joe, W4TV On 5/28/2012 11:20 AM, Wayne Burdick wrote: > We'll be doing careful measurements of APF pre-/post-4.51 this week. > There was no intentional change to it, and to me, at least, it still > sounds the same. > > Wayne > N6KR > > On May 27, 2012, at 8:31 PM, Bob K6UJ wrote: > >> Can anyone give me feedback on 4.51 for the K3 as far as affecting >> the APF on CW sigs ? >>> From what I've read so far the NB and NR are enhanced, I was >>> wondering if it has any affect on the APF. >> >> >> tnx, >> >> Bob >> K6UJ >> >> >> >> >> ______________________________________________________________ >> 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