[GreenKeys] numbers stations?

[Eugene Hertz]

could it have been one of those "spy numbers stations" using rtty instead of voice?
http://www.spynumbers.com/
Eugene


>> IN THE 70S , 80S, AND INTO THE 90S WE USED TO PRINT A 
>> BUNCH OF STATIONS SENDING FIVE NUMBER GROUPS AS THE MESSAGE TEXT... 
>> THE HEADERS WITH NORMAL ZCZC TYPE STUFF CAME THROUGH OK BUT THE 
>> TEXT WAS IN GROUPS OF NUMBERS... WHAT KIND OF UNIT WAS USED TO 
>> DECIPHER THIS AND WAS IT MECHANICAL OR ELECTRONIC I WONDER??? 
>> 
> 
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