I also like the 400 Hz filter, but when tuning around like in this weekend's CQ WPX RTTY then I went much wider. With that width came lots of noise. What is a good idea on that? And thanks ahead of time.
On Mon, Feb 16, 2015 at 12:47 PM, <[email protected]> wrote: > > > > David Moes > VE3DVY > > Since I find that the 8 pole 250 Hz filter is really a bit wider I tell > my K3 in filter setups its 300hz It works fine for me this way including > on RTTY > > During the WPXRTTY this weekend I had good luck copying weak signals > right beside a power house signal using the 250hz filter. > > >> --- Original message --- >> Subject: Re: [Elecraft] K3: best roofing filter on RTTY >> From: Jim's Desktop <[email protected]> >> To: <[email protected]> >> Date: Monday, 16/02/2015 9:49 AM >> >> The narrowest filter I have in both receivers is the 400 Hz one. I >> borrowed a K3 that had a 250 Hz filter in it once and tried it on RTTY. >> It works, but it's right on the margin of being too narrow. If someone >> is using one of the older Packet TNC's that have RTTY mode in them (they >> used 200 Hz shift instead of 170 and there are still a lot of them out >> there) it's really hard to get them tuned in with a 250 Hz filter, >> especially in weak signal/selective QSB situations. The 400 Hz filter >> doesn't seem to have that limitation though it does let slightly more >> noise in (easily handled with the DSP filters anyway. >> >> Jim - W0EB >> >>> >>> >>> On 2/15/2015 11:35 PM, David Cole wrote: >>> >>>> >>>> Hi, >>>> I ordered and use the 400 for RTTY, I suspect the 250 is a bit to >>>> narrow. >>>> >>> >>> > ______________________________________________________________ > 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 > Message delivered to [email protected] > -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." ______________________________________________________________ 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 Message delivered to [email protected]
