Bell telephone magazine (1922) (14569580647)

One of the first microwave relay systems in the US, a 5 GHz link built by AT&T's manufacturing arm Western Electric in 1946 using military technology that provided telephone service 22 miles between Los Angeles and Catalina island off the coast of California. This is the Los Angeles end, two parabolic dishes one for transmitting and one for receiving. From "Bell Laboratories' Role in Victory" in Bell Telephone magazine, summer 1946, p. 123

Identifier: bellvol25telephonemag00amerrich (find matches)

Title: Bell telephone magazine

Year: 1946

Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept

Subjects: Telephone

Publisher: (New York, American Telephone and Telegraph Co., etc.)

Contributing Library: Prelinger Library

Digitizing Sponsor: Internet Archive

Text Appearing Before Image:

As a supplement to wire circuits in the communications zone, the Laboratories developed a micro-wave radio system operating at about 5000 megacycles. At that frequency the waves behave like those of light, and a clear straight line path is required. A number of these systems were built by the Western Electric Co. and installed near the end of the war in South Germany and functioned well; one link was over 100 miles long, from Heidelberg to Zugspitze. Usually however, links are about thirty miles long. Systems of this type are now in Bell System service, linking Nantucket and Catalina islands to the mainland

.SiAtS JH ijcruumy: a relay point o>i a nncro-ivavc radio system. Several of these systemswere used by American forces .^ and proved very satisfactory 1946 Bell Laboratories Role in Victory 123 mf^r^ mx^K: __^ ^■SS^S

Text Appearing After Image:

On the Pacific coast: Mainland antennas of the new peacetime radio telephone installation to Catalina Island with an engineer from the Laboratories on hand to service them.

bell telephone magazine 1946 bell telephone magazine radio historical images of santa catalina island california microwave towers in the united states radio relay antennas book illustrations history of technology electric power bell telephone company telephone american telephone and telegraph company images from internet archive california

1922

Prelinger Library

http://commons.wikimedia.org/

public domain