Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!snipe.eternal-september.org!.POSTED!not-for-mail
From: snipeco.2@gmail.com (Sn!pe)
Newsgroups: comp.misc,alt.folklore.computers
Subject: Re: the early teletype
Date: Thu, 14 Nov 2024 22:45:50 +0000
Organization: Sn!peCo World Wide Wading Birds
Lines: 34
Message-ID: <1r31arw.1xrpfjr1favr9hN%snipeco.2@gmail.com>
References: <673571b4$2$13$882e4bbb@reader.netnews.com> <vh46uj$2mhr0$3@dont-email.me> <wzrZO.4444$pZ%.2037@fx16.iad> <vh5rjb$310hc$2@dont-email.me> <1r319ug.19nvdvtayti13N%snipeco.2@gmail.com> <vh5tka$310hc$8@dont-email.me>
Reply-To: snipeco.1@gmail.com (Sn!pe)
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 14 Nov 2024 23:45:50 +0100 (CET)
Injection-Info: snipe.eternal-september.org; posting-host="3846360d3328ba31d2bc77d8e7c3b848";
	logging-data="3197453"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+Dd9mgfStJfQF2b/WTggmL"
User-Agent: MacSOUP/2.8.6b1 (ed136d9b90) (Mac OS 10.13.6)
Cancel-Lock: sha1:jtLqPqkMUvMyPgP5o6JGTZIgQaM=
X-Clacks-Overhead: GNU Terry Pratchett; WonK; Large Enid; Lydia Dustbin
X-Copyright: Copyright (c) 2024 Sn!peCo WWWB, All Rights Reserved.
 This article may be reproduced for the purposes of propagation and
 personal use only, no commercial use without express permission.
X-Disclaimer: Any advice that I may give is worth only what I paid for it.
 This article comprises only my personal opinions unless otherwise stated.
 May contain traces of nuts.
X-Validate: All genuine Sn!peCo articles contain the header:
 "Injection-Info: snipe.eternal-september.org;" my registered FQDN.
X-Tongue-In-Cheek: Always
X-Face: 5<x+vv{"AHN,F~/dhf,X*~1zNv[TF/WUe(Uw.*ZOw\P'Ju]C6].T~7Z5cVjV\xTO6&)1#VQ
 iZ4vFDG
Bytes: 3318

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

> On Thu, 14 Nov 2024 22:19:48 +0000, Sn!pe wrote:
> 
> > Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
> > 
> >> On Thu, 14 Nov 2024 18:45:48 GMT, Charlie Gibbs wrote:
> >> 
> >> > Original Teletype machines ran at 45.45 baud.
> >> 
> >> I remember labels on Creed machines saying "50Bd".
> > 
> > I had a Creed 7B 60 years ago, I used it for RTTY.  It had two
> > governers, one for 45.45 Bd, the other for 50Bd.  They had white
> > strobe marks on the circumference to set the speed accurately.
> 
> Hmmm ... presumably the strobe marks were for use with a fluorescent 
> light ... driven from AC mains frequency? Did they have different marks
> for 50Hz versus 60Hz mains?
> 
> No, that wouldn't work, you would need entirely different gearing for the
> strobe wheel ...

IIRC 50Bd was the US standard, most common in the rest of the world 
was 45.45Bd  There was no gearing involved, the governor was attached
directly to the motor spindle and the strobe timing marks were on the
governors themselves.  I think (I'm not sure) that there were a
different number of strobe marks on either governor.  

I speak from personal experience but it was 60 years ago when I was 
a teenager and memory is a tricky thing.

-- 
>^�^.    Sn!pe, PTB, FIBS        My pet rock Gordon just is.