[RTTY] Why 45.45 baud?

[Peter Laws]

On Tue, Apr 15, 2014 at 2:14 PM, Kai <k.siwiak at ieee.org> wrote:
> Dennis,
> Great question!
>
> See the second installment of RTTY articles by Irvin Hoff, K8DKC,
> "Operating the Teleprinter",  QST, Feb 1965, pp 29-35. He wrote 13 articles
> in QST in 1965-66 on all aspects of RTTY.   the reciprocal of 45.454545...
> baud (we round to 45.45, some EUs use 45 baud)  equals 22 mS, the basic
> timing interval for the teletype code. He also discusses the roots of 1,
> 1.5, 1.43, 2 pulse stop bit intervals.
>
> The series is very interesting reading, and traces the archaic roots from
> land-line tone units today's RF amateur-RTTY standard.
>


Can't say as I'll read them all but I pulled this one from the archive
and it's pretty interesting.  About to read about USOS ...


-- 
Peter Laws | N5UWY | plaws plaws net | Travel by Train!