I was wondering about just how narrow we can go on JT9, JT65, or WSPR. I always believed that reducing it would actually degrade the RX. However, the User's Guide (first link below) doesn't say that! Apparently, the reason for a wide RX bandwith --up to 5 kHz-- is simply so that we can see more signals in the wider waterfall. physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-1.7.0.html
Any more experiences about reducing the bandwith, even below 1300? And we should encourage using JT9 whenever possible. The reasons are well-known. Not only is JT9 significantly more sensitive on 160m, but you can fit 10 JT9 signals in the same bandwidth as one JT65 signal. See physics.princeton.edu/pulsar/K1JT/wsjtx.html 73, Mike www.w0btu.com On Mar 18, 2017 1:48 PM, "Dennis W0JX via Topband" <[email protected]> wrote: ... Regarding bandwidth, it is not necessary to run your SSB filter wide open for JT65. On my K3, I adjust the width downward to about 1300 Hz. It really helps with noise and QRM. _________________ Topband Reflector Archives - http://www.contesting.com/_topband
