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KF5JRV > TECH 27.10.16 04:33l 16 Lines 601 Bytes #999 (0) @ WW
BID : 4171_KF5JRV
Read: GUEST
Subj: Spread-Sprectrum
Path: IW8PGT<IR2UBX<IZ3LSV<ED1ZAC<NA7KR<KQ0I<N9LYA<N0KFQ<AE5ME<KF5JRV
Sent: 161025/1048Z 4171@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Glamorous Film Actress Hedy Lamarr Invents Spread-Sprectrum
In 1940 Hollywood actress Hedy Lamarr and her neighbor, avant-garde composer
George Antheil, invented “frequency-hoppingö transmission, now called
spread-spectrum. The following year Lamarr patented "frequency-hopping" under
her then-married name of H. K. Markey, and assigned the patent to the U.S.
Government. This early version of frequency hopping used a piano-roll
to change between 88 frequencies, and was intended to make radio-guided
torpedoes harder for enemies to detect or jam.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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