[GreenKeys] Bit rate question

[Howard Weeks]

On military tactical teletype circuits, there was always some 
varience in motor speeds and other distortion that made it more 
difficult to keep the machines on a TTY loop in sync.  The longer 
stop bit provided provided more time for all the machines to "get 
ready" for the next start bit.  

On 14 Sep 2011 at 15:16, Jim Haynes wrote:

> On Wed, 14 Sep 2011, Sam Etler wrote:
> 
> > Are there any recommended reading materials that cover good basics
> > of telegraphy? I've come across a number of books from the 1800s and
> > early 1900s but if anyone has some specific references they
> > recommend I'd love to hear it.
> >
> "Principles of Electricity Applied to Telephone and Telegraph Work" by
> AT&T Long Lines.  Several editions, and at least one of them is online
> as a pdf.  I think if you google for it you will find it.
> 
> As for this "government rate" bit rate, I guess we need some former
> Bell System techs who used the test set who might know how it was
> used. We've been talking about start-stop, but it could have been
> synchronous as well.
> 
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Howard Weeks
Harlem, GA 
K5JCP