Well actually I prefer copying CW with a certain amount of noise present. Pure tone, no noise CW, as from a practice oscillator or an S9++ signal quickly becomes boring and I loose concentration(or something). It's perhaps why I prefer to dig out weak signals (ESP) from the noise on the band. However I do really appreciate the tools available in the K3 to do this :) APF works great if you really learn how to use it.
Any one else? 73, Deni - F5VJC On 6 February 2016 at 12:19, Bill W4ZV <[email protected]> wrote: > N1EU wrote > > I suspect that when the K3 APF was first engineered, the Yaesu FT-1000D > > APF > > (original hi-Q version) was used as the model because many prominent > > dx'ers/topbanders always raved about it. > > I lifted the "original" FT-1000D APF from the schematic in 2009 and Al W6LX > did a circuit simulation on it. Al's description provided the roadmap for > what Elecraft eventually implemented in the K3's DSP in 2010. > > http://www.mail-archive.com/elecraft%40mailman.qth.net/msg105227.html > > As Wayne has suggested previously, APF works best if you use a relatively > wide DSP setting (I use 400 Hz). I trick my K3 into using my 200 Hz XFIL > at > DSP=400 by setting the XFIL BW to 400 (similar idea to what Wayne recently > suggested with the 2.7/2.8 XFIL for better NB). The wider DSP BW keeps the > ringing down and gives your ear/brain a better background to discriminate > signals through the 30 Hz APF without ringing while the wide (5 pole) 200 > Hz > XFIL still gives good protection from nearby strong signal overload. > Setting the VFO is not as critical compared to narrow DSP settings, and I > use APF virtually all the time...even in contests. This signal path may > help visualize what I'm doing: > > signal >> 200 Hz XFIL >> 400 Hz DSP >> 30 Hz APF >> ear/brain > > 73, Bill W4ZV > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/APF-audio-peaking-filter-on-the-K3-K3S-KX3-tp7613416p7613632.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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]
