Bill, I have a very similar filter set (to Brett's as shown below), including the 250 Hz 8-pole.
I find the 1 KHz is best for casual CW and digital modes, and the 250 Hz filter is best for eliminating strong adjacent signals and in CW pileups. Would have to say that I'm on the 1 KHz filter 90% of the time though. The 250 gets put into service when it's contest time, or the bands *really* open up (like lately). You can put a lot of energy into a 250 Hz bandpass, so it's also excellent for weak CW and some digital signals. Because it's so narrow, you may find tuning with the 250 to be hit-or-miss. If you tune with the 250 Hz filter, maybe try FINE resolution. Also, with a narrow filter like this one, you may want to boost the gain to 3 or 4 dB. Remember that the roofing filter is only part of the equation. The DSP really provides the ultimate bandpass shaping, so you can still get down to 50 Hz (I think...) in CW using the WIDTH or HIGH/LOW controls. 73, matt W6NIA K3 #24 On Tue, 16 Feb 2010 12:24:38 -0800, Brett wrote: >So my choices are 13Khz, >2.8Khz, 1.5Khz, 1.0Khz, 250Hz. I have that combination in both >receivers and I'm very happy with the way it works. == >> As a prospective buyer of the K3, and a 100 percent CW op, I am wondering >> which of the roofing filters is the correct choice, assuming I am buying >> only one?? I usually find that when operating weak sigs with my Pro 3, a >> bandwidth of about 600 to 800 hz is plenty adequate in normal QRM >> conditions. With that is mind, am I better off with the 1000 or 500 HZ 8 >> pole filter??? >> >> Bill, N6FB >> >> >> ______________________________________________________________ >> 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
