[GreenKeys] QUES ABOUT CODED TRANSMISSIONS...

[wa2hwj at att.net]

There's still some of that 5 character stuff on the air. I've copied weak
signals at 50 baud, 425 HZ shift around 10 MHZ.

Jack WA2HWJ


-------------- Original message from Bob Camp : -------------- 

> Hi 
> 
> Well it turns out that some amount of it was simply what it looked like 
> at first glance - junk. Apparently some of the various fringe groups 
> around the world had a lot of fun transmitting stuff simply to choke 
> the other guys code breakers with to much work. 
> 
> The part that was not junk and that was done mechanically was decoded 
> by stuff that ranged all the way from multi rotor Enigma clones to one 
> time tapes. Both "our side" and "their side" used Enigma clones with 
> various numbers of rotors ranging from four up to a reported seven. 
> 
> Of course there was also electronic gear that ultimately replaced the 
> purely mechanical stuff. By the 90's I doubt that many people were 
> running mechanical encryption any more for stuff they worried very much 
> about. Certainly there are reports of mechanical encryption being used 
> by the Soviets when they were in Afghanistan in the 1980's for tactical 
> messaging. 
> 
> Enjoy! 
> 
> Bob Camp 
> KB8TQ 
> 
> 
> On Oct 11, 2004, at 3:47 PM, ROBERT LAAG wrote: 
> 
> > 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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