[time-nuts] Antique precision timing device without electronics

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Mar 17 15:00:13 EDT 2017

In message <C29DE194-0F15-4CDC-B2AB-C8D10FE5E723 at scace.org>, Eric Scace writes:

>   Frequencies around 15 Hz were common on early 20th century cables, 
>depending on the degree of success in compensating for the inherent 
>capacitance on a cable thousands of miles long surrounded by conductive 
>sea water. Cable compensation is an entirely separate subject outside 
>the scope of a time-nuts forum.

In 1924 a new "continuously loaded" submarine cable from New York
to Azores did indeed provide the expected transmission rate 1920
letters per minute:


It seems that people didn't really expect that, because it took a
couple of years to build terminal equipment which could exploit all
that bandwidth:


Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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