Thanks Joe. Mike, W9MDB, sent me a procedure using WSJTX to determine the cutoff points. I arrived at exactly what you are saying. I am using 1500 and find that I can copy JT9 out to 3000 and if a stronger signal out to about 3300.
73, Tom - KQ5S On Tue, Jul 4, 2017 at 7:25 AM, Joe Subich, W4TV <li...@subich.com> wrote: > > I am using a width of 4 khz and using the radio in split mode. >> > Width of 4 KHz is useless with a 2800 Hz SSB filter. You do not > need (and can't use) more than 3000 - 3300 Hz. > > The default shift of 1500 (for DATA A) will provide relatively > flat audio response from 300 Hz to 2800 Hz with Width at 3000 Hz. > If you move the shift to 1700 the "flat area" of the audio pass- > band will be about 300 to 3000 Hz. > > Remember, with a 2800 Hz filter the maximum bandwidth is 2800 Hz > between the -3 dB points. Setting a wider DSP filter is not going > to make the flat are any wider it will only allow you to see more > of the filter skirts. If you really need the full 4 KHz get an > AM (6 KHz) or FM (13 KHz) filter. > > 73, > > ... Joe, W4TV > > > On 7/2/2017 3:50 PM, Tom-KQ5S wrote: > >> Hope this is not a dupe. I sent it over an hour ago and nothing showed >> up. >> >> I am trying to tweak my WSJTX setup. What is the recommended shift for >> the >> K3S while running WSJTX? I have the 2.8 khz SSB filter installed. I am >> using a width of 4 khz and using the radio in split mode. >> >> >> 73, >> Tom - KQ5S >> ______________________________________________________________ >> 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 >> Message delivered to li...@subich.com >> >> ______________________________________________________________ > 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 > Message delivered to kq5s...@gmail.com > ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
