Now , that is interesting ! I'll have to look that up.
Great.
Geoff.
----- Original Message -----
From: "John Lawson" <jpl15_at_panix.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk_at_classiccmp.org>
Sent: Friday, October 08, 2004 12:14 AM
Subject: Clandestine data - was: media what died a'bornin'
>
>
> It is little known (but documented) that, during WWII, radio station KHJ
> in Los Angeles ( and undoubtedly many others ) sent radio-teletype signals
> by shifitng the carrier a miniscule amount - I think about 10 htz, and
> using a very slow baud rate. This would not be noticed by the average
> equipment of the day, and would take very specialized gear to recover,
> store and print
>
> But it allowed messages to be sent large distances by powerful
> transmitters - completely 'in the blind'.
>
> Cheers
>
> John
>
>
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Received on Sat Oct 09 2004 - 16:02:49 BST