> On Jul 9, 2021, at 9:54 AM, Al Pawlowski <k6...@almont.com> wrote:
>
> Though my rig can go to 9999Hz rx BW and WSJTx v2.4.0 set to 6000Hz, 4500kHz
> is all I can get - above that, decodes stop and the waterfall fills with
> noise. I wonder if the limit is due to my CPU speed (usage increases with BW
> and channel activity) or a WSJTx thing. Reports from others doing larger BW
> would be interesting.
Remember, we are mostly using single sideband radios. They weren’t designed to
be broadband receivers or transmitters. When you get above about 3500, you’ll
find few people to go with you (jmho). I venture up there now and then, but I
have no idea how the distortion or response is above 3K. For WSJT-X, I run
3400 receive high cutoff with 100 or sometimes zero as low end cutoff. Just
yesterday, I saw someone about 3200, but he wasn’t doing well as far as pulling
people up there. He was the only one.
I was pleased last week when Europe opened up strong to our part of the
country. Not only was 50.313 heavily loaded, but .323 was about 85-90% as full
and stayed that way.
Until the majority of the people have broadband receivers, the VFO will be the
ruling factor as far as I can see. Not many people can run down to the corner
radio store and grab a new radio off the shelf just to add some extra bandwidth
for digital modes.
Gary - AG0N
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