I'll agree here... I've got 2 1.5Khz filters in my radio and spend a lot of time using them and have no problems using them. They pass the voices quite nicely and are very intelligible. I find that having them engage at 1.6Khz works best for me. I find I'm usually using 1.6Khz for my SSB work even in calm condx. I just want to hear the guy and not really into all the additional noise. I REEEEEAAAALLLY love getting into QSO's with the ESSB guys when they start saying yea I'm transmitting at just about 4Khz right now and blah blah blah... I usually come back with thats great and all but I'm listening to you through a 1.5K filter. ;)
~Brett On Fri, 2010-03-05 at 14:17 -0800, Ed Muns wrote: > > The way the filters work, the K3 does not kick in the filter > > until you narrow the bandwidth to that filter's size. So, if > > you get the 1.8 all bandwidths between 1.9 and 2.7 or 8 will > > run off of the standard 2.7 or > > 2.8 filter, and the 1.8 sits idle. > > The K3 engages each roofing filter at the DSP bandwidth YOU choose to put > into the CONFIG menu. You can have the 1.8 kHz filter engage at 1500 Hz or > 2200 Hz or 1800 Hz or whatever you choose. > > > What I have observed is the narrower the filter the weirder > > and more unnatural it sounds in SSB. At 1.8 you have > > filtered out a substantial part of the normal SSB signal. > > What left can be understood but it is not pleasant or > > comfortable to the ear. You may find the filter very helpful > > for picking out a weak signal under difficult conditions, but > > you would not want to use that for very long, and not for casual talk. > > It is important to understand which part of the audio spectrum to filter out > to retain maximum intelligibility. As you reduce from 2800 Hz to 1800 Hz > bandwidth on SSB, the removed spectrum should come entirely from the high > side. This is easily done by reducing HI CUT and leaving LO CUT alone. Fc > will track automatically and stay in the center between LO CUT and HI CUT. > If you use WIDTH, then you will have to lower Fc via SHIFT by half as much > as you reduced WIDTH in order to retain full intelligibility. This is far > more tedious than simply reducing HI CUT. > > > I would suspect the 2.1 filter would be more natural sounding > > and you might find that more pleasant to use. > > I've been using exclusively a 1500 Hz SSB bandwidth for over two years now > on the K3. It sounds wonderful and is fully intelligible ... for > communications, contesting, etc. No, it is not for high-fidelity music. > > Ed - W0YK > ----------------------------------------------- > Ed Muns > Muns Vineyard - www.munsvineyard.com > FaceBook - www.facebook.com/munsvineyard > > ______________________________________________________________ > 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 ______________________________________________________________ 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
