Clandestine data - was: media what died a'bornin'

[Joe R.]

  I've got news for you. They still do the same type of thing. There are
hidden signals all over the sperctrum. There ARE benefits to owning a GOOD
surveillance reciever :-)

    Joe


At 07:14 PM 10/7/04 -0400, you wrote:
>
>
>  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
>
>
>