> 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
