Joe, For some reason you keep thinking that Elecraft's APF is being designed and programmed by Yaesu engineers.... Why is it that just because Yaesu made a mistake with their rig that it means Elecraft has to destroy THEIR APF just because they choose to add an adjustable Q control? You have to have confidence that the APF can remain exactly the same as Lyle and the gang has written it while still adding the ability to open it up some? Just because Yaesu programmers weren't talented enough not to destroy what they had built doesn't mean that Elecraft will make the same mistake. Furthermore there are Alpha testers like myself that will make sure that once the variable Q has been put in that when set to the Minimum (narrowest) setting that it will still act and feel like it does now. Of course you too could do the same as an Alfa software tester. This isn't Yaesu where no one listens to the users once they choose to make a change or adjustment to the code... Your say WILL matter if things sound different once the feature has been improved for others. I really don't think that you're giving Elecraft, it's programmers, or the Alpha testers such as myself enough credit. I'm in favor of having a variable Q on this APF system. It will help improve copy with a tight algorithm that Lyle has written for this one, while at the same time allowing me to open the Q so that I can copy not as weak signals with gain, and less ringing. I believe that Lyle will not destroy his own code by adding a feature that Enhances the operation of what he's already created for us. If he does, I will be the first to let him know so he can re-program it. The Dual pass band filter is nice, yes, but if you've used your DPB filter in the K3 you know as well as I do that it acts NOTHING like the APF with a wider Q in suppressing noise and improving gain as we're seeing on this current APF. Again, this is NOT a Yaesu rig...
> Date: Sun, 31 Oct 2010 10:27:33 -0400 > From: li...@subich.com > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 APF Adjustable Q > > > >> however the fixed Q has a bit of ring and at times I would like to > >> back it off (widen) it just a tad. > > This is the same mistake Yaesu made in the FT-1000D; de-Qing the > original APF made it useless in later radios. This is the very > reason not to add adjustable Q or reduce the Q of the APF currently > in field test. If you want a less aggressive filter that is centered > on the sidetone, use Dual PB ... that's exactly what it is designed > to do (and it does a very good job when used as designed). > > Adjustable center frequency is very important ... particularly when > PB CTRL is set for Shift=.05 (to allow LO-CUT-HI to function) as > the 50 Hz increments too course to tune APF using the VFO. The user > also needs the ability to adjust the peak independently in order to > peak up an off frequency caller and not "chase them up the band." > > 73, > > ... Joe, W4TV > > > On 10/31/2010 8:58 AM, Steve Ellington wrote: > > If I had a choice between variable center frequency and adjustable Q, I > > would choose adjustable Q. > > > > My logic is: The center frequency automatically follows the sidetone > > frequency so I have no need to adjust it however the fixed Q has a bit of > > ring and at times I would like to back it off (widen) it just a tad. > > > > Otherwise it's a HUGE improvement, sounds great and I wish to thank those > > who made it possible. > > > > 73 > > N4LQ > > Steve > > > > ______________________________________________________________ > > 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
