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Re: [TowerTalk] Original Hygain/Military-Commercial Products

To: Jim Lux <jimlux@earthlink.net>, towertalk@contesting.com,Chris Pedder <chris@g3vbl.co.uk>, Pat Barthelow <aa6eg@hotmail.com>
Subject: Re: [TowerTalk] Original Hygain/Military-Commercial Products
From: Gene Smar <ersmar@verizon.net>
Date: Mon, 31 Dec 2007 08:47:14 -0600 (CST)
List-post: <mailto:towertalk@contesting.com>
TT:

     For more background info on the development of SS technology, Google <Hedy 
Lamar>*, the 40's screen actress.  In 1942 she and her publicist, George 
Antheil, developed and were granted a patent for an early form of 
frequency-hopping encryption to provide anti-jamming for radio-controlled 
torpedoes.  (I'm finished with this OT topic.)


73 de
Gene Smar  AD3F
* And it's NOT <Hedley>.


From: Jim Lux <jimlux@earthlink.net>
Date: 2007/12/31 Mon AM 08:26:44 CST
To: Pat Barthelow <aa6eg@hotmail.com>, Chris Pedder <chris@g3vbl.co.uk>, 
        towertalk@contesting.com, aa6eg@hotmail.com
Subject: Re: [TowerTalk] Original Hygain/Military-Commercial Products

<snip>
  
>
>Someone once told me, that,  long before  Spread Spectrum became familiar in 
>the ham radio vernacular, that  the term "Spread Spectrum" was itself 
>classified, could not even be said openly, among the military/spook crowd.

Probably true, but that would have been 50s, perhaps 60s, era.   R.C.Dixon 
published Spread Spectrum Systems in 1976.  Lots of people were thinking about 
it and discussing it before then. About the time that PLL synthesizers  & 
microprocessors became common, it became possible to do FH fairly easily, and 
there were a number of "retrofit" FH radios around.

Jim, W6RMK
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