[BC] GWEN system...

[RichardBJohnson at comcast.net]

This link purports to provide sounds of GWEN.

http://www.fas.org/nuke/guide/usa/c3i/gwen.htm

I'm not sure it is correct because the LF transmitter, made by Westinghouse,
"the world's first all solid-state AM transmitter," is/was fully-capable of
AM, with a voice-grade frequency response and certainly voices are
much more readable in 'spherics than digital data.

The sounds provided, sound like 1200 baud RTTY, but
interrupted at one second intervals. If data were truly to be sent
in an emergency, it would be sent continuously, over and
over again so that receivers could extract it from the noise.

So, if this IS GWEN, it's an example of why it won't work!

--
Cheers,
Richard B. Johnson
Read about my book
http://www.LymanSchool.org


 -------------- Original message ----------------------
From: "Gary Peterson" <kzerocx at rap.midco.net>
> " FWIW, back in the 80's we used to lease land at the old WXTR-FM tx site 
> in Waldorf, MD to the Army for a GWEN station.  Maybe Eddie or Chip have 
> photos to share.  All my stuff is boxed up in storage.
> Wonder what its status is today?
> G "
> 
> While listening for signals in the experimenters' band, back sometime in the
> 80s, I remember hearing very strong signals on VLF.  They sounded like
> several mechanics dueling with air hoses in a large garage.  The S meter
> would kick way up and the speaker would emit a loud hiss, then silence, then
> another hiss with a different signal strength and a different timbre, then
> another hiss, sometimes overlapping a previous hiss.  I surmised it was
> digital data of some sort coming from multiple sources.  Many others in the
> area heard the same signals.  Someone suggested it might be something called
> "GWEN."  Does this sound like the type of modulation that was used by GWEN
> VLF stations?  I haven't heard it for many years now.
> 
> Gary, KØCX
> CE KFXS, KOUT, KKMK, KRCS, KKLS & KBHB
> Rapid City, SD
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