Fw: [GreenKeys] QUES ABOUT CODED TRANSMISSIONS...

[H. Treumann]

> hi,
>
> the German Weather Service (Deutsche Wetter Dienst - DWD) is still
> transmitts 50 Bd 425 Hz RTTY weather broadscast
> 24/7 on long- and shortwave frequencies.
> Some of the transmissions are SYNOP code
> (http://www.zetnet.co.uk/sigs/weather/Met_Codes/codes.htm ) some are plain
> text
> (either German or English).
>
> Maybe some of you can receive the 10 MHz channel even outside Europe.
>
> Here is the timetable (in German)
>
>
http://www.dwd.de/de/wir/Geschaeftsfelder/Seeschifffahrt/Sendeplaene/telexpln.htm
>
>
> 73s,
> Henning, DF3OE
> www.teleprinter.net
>
>
>
> ----- Original Message ----- 
> From: <wa2hwj at att.net>
> To: "Bob Camp" <ham at cq.nu>
> Cc: "Greenkeys" <greenkeys at mailman.qth.net>; "ROBERT LAAG"
> <LAAG at PACBELL.NET>
> Sent: Monday, October 11, 2004 10:45 PM
> Subject: Re: [GreenKeys] QUES ABOUT CODED TRANSMISSIONS...
>
>
> > 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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> > > > GreenKeys at mailman.qth.net
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> > > >
> > >
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>
>