Topband: Top Band and JT65
Brian D G3VGZ
topband at planet3.freeuk.co.uk
Sat May 13 18:50:18 EDT 2017
Mike Waters <mikewate at gmail.com> wrote:
> Maybe some do. But I usually turn the speakers off when operating digital
> That extra 2 dB over JT65 --as well as freeing up large portions of the
> band-- ought to matter to more hams.
I find the better ability for JT65 to decode co-channel signals with its two
pass decoding makes up for any 2dB improvement in decoding JT9. I also find
a single static crash can take out JT9 decodes, more so than JT65.
> 73, Mike www.w0btu.com
> On May 13, 2017 3:32 PM, "Brian Pease" <bpease2 at myfairpoint.net> wrote:
> This may sound strange, but my opinion is that hams like the musical tones
> of JT65.
> On 5/13/2017 3:27 PM, Mike Waters wrote:
> > Why not JT9? It has a 2 dB improvement in S/N ratio on 160, while using
> > only 1/10 of the bandwidth.
> > I cannot understand why JT9 is used so little on 160 thru 20. JT65 is a
> > VHF mode.
> > physics.princeton.edu/pulsar/K1JT/wsjtx.html
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