Hi Rick and the group,
I am sure you will find the 250Hz filter just fine, and maybe even a little
wide at times.
OK, I know the filtering on a 756Pro is a little different, but I frequently
set my filters down to 100Hz. Whilst that may seem very narrow, I don't use the
built in RTTY filters, as I prefer to change mine according to needs at the
time.
The filtering in this way is a little SSB-like, in that the skirts flare out
enough to give copy on a RTTY signal when set to 100Hz.
It will even cope with those signals that are slightly wider than usual, but
you do have to tune in the signal very accurately.
So, I am sure you will find 250Hz just fine!
It may also pay you to look out for one of the external audio filters that sit
between the rig and the soundcard. These can clean up a lot of hash, and make
copy a little more reliable.
Cheers for now
Phil GU0SUP
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