As I wrote in an earlier post, the 250 Hz filter skirts are assymetrical, at least mine is. On one side, they are about right for using a 250 Hz dsp setting but on the other side, they are wider. You may also benefit from tweaking the filter center frequency which you can do using the configuration utility; my 250 Hz filter Freq. Offset 0s-s set at -.04 but you best setting may likely be something different; yes, it's nit-picking but what else is an old geezer to to when the bands are dead. Usually, best/least ringing response is obtained with the filter centered as best possible but you can also listen to noise. I usually set the default width for my 250 Hz filter at 200 Hz and the default center frequency of the 500 Hz filter at 450 Hz which gives a slight improvement in ringing response at 200 Hz and 450 Hz by getting the filter corner frequencies further down the dsp skirts; most of the time I just use either of these two default frequencies as I can toggle between them and the 1.8 KHz with the XFIL button.
Dunc, W5DC Radio Amateur N5GE wrote: > On Wed, 14 Jul 2010 12:01:30 -0700 (PDT), Bill W4ZV > <[email protected]> wrote: > > I second that. I wonder why they don't label them as the width they > really are? > > Tom, N5GE > > K3 #806 with SUB RX, PR6, > KRC2 and K144XV > K3 #1055 with PR6 and XV432 > W1, 2 W2's and other small kits > > QCWA Life Member 35102 > > [email protected] > http://www.n5ge.com > http://www.swotrc.net > > >> I'd be interested in a **true** 6 dB BW 8-pole for 200-250 Hz (Inrad's "250" >> is actually 370 Hz BW and I don't want that). >> >> 73, Bill >> > > ______________________________________________________________ > 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
