Hi Ken, For narrow DSP filter bandwidths (100 Hz or less I think) you have the option of using a FIR filter (default) or an IIR filter. IIR filters can "ring" which sounds like it might be what you are experiencing. That may be your problem - that you are using an IIR filter. You can toggle between the FIR and IIR filters by a CONFIG command; CONFIG->FLx BW (then tap 7). (See page 55 of the K3 manual under FLx BW.) Hope that helps.
73, Ted, W2ZK Kenneth Waites wrote: > When on low bands, weak signal, rf gain cranked up, narrow CW bandwidth, I > get a bit of continuous howling effect from the white noise/QRN that is about > the same audio freq as the signal I am copying. > > I have .2 khz, 5 pole -.94 crystal. > > I have always just ignored it, turning rf gain down helps a bit - very > critical. But I started thinking maybe others have found some good > techniques to minimize this. As I write this I think I may experiment with > the boost I give for this crystal. Wondering if 8 pole crystals sound > diferent. > > Any suggestions? > > Ken K5WK > > > ______________________________________________________________ > 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
