[GreenKeys] 75 baud RTTY

[R Russell Miller]

Jim,

You just missed the BARTG 75 Baud RTTY Contest in April!    But, to answer
your question directly, yes 75 Baud RTTY does work on HF.

I've worked Africa, the Caribbean, Europe, and multiple US States on 75
Baud RTTY.

Here is a link to the BARTG 75 RTTY Contest:

http://s3.spanglefish.com/s/7850/documents/contests/sprint75/rules/current/bartg%20sprint%2075%20rules.pdf

73
Russ WA3FRP

On Sat, May 20, 2023 at 11:05 PM Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Sat, 20 May 2023, Jeffrey Golas wrote:
>
> > Just curious, since I dont think Ill have the UGC-48 done at the ship
> > for a while yet...has anyone done 75 baud RTTY over HF? Work ok? We do
> > have one working UGC-48 (28 dome top) geared for 75 baud (74.2? or
> > whatever the Navy used)
> >
> Back in the beginning of amateur RTTY we were required to use 45.45
> baud (60 wpm) by the FCC.  When Model 28 equipment become more plentiful
> some guys petitioned the FCC successfully to allow higher baud rates
> so they could show off their 100 wpm machines.  This never gained much
> popularity.
>
> Then it turns out that because of the nature of the HF medium 45.45 baud
> is about as fast as you want to go.  Higher speeds, shorter bits, are
> much worse affected by things like multipath propagation.
>
> Jim W6JVE
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