Re: the early teletype

Charlie Gibbs  <cgibbs@kltpzyxm.invalid> wrote:

On 2024-11-14, Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>

You could hear such signals quite frequently on short-wave radio -- a
rapid series of tones alternating between two pitches -- much faster than
Morse code.

>
Original Teletype machines ran at 45.45 baud.  The later standard
was ASCII at 110 baud (150 baud for a model 37 Teletype).

RTTY can still be heard on the amateur radio bands at various baud
rates and shifts based upon the current band conditions.  It is quite
possible to copy 110 baud RTTY by ear and an old friend of mine could
do so.  It's dying out though because the modern digital modes have
much better performance under marginal conditions.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."