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The term SCR was part of a nomenclature system developed for the U.S. Signal Corps, used at least as far back as World War I.Three-letter designators beginning with "SC" were used to denote complete systems, while one and two-letter designators (such as "BC", for basic component, "FT" for mounting, etc.) were used for components.
In addition to radio and telephone communications, the newly developed teleprinters, carrier pigeons and heliographs were used for messaging. During the First World War, radio telegraphy took on increasing importance. For example, in 1915 teleprinters were first used by the air force, for artillery observation. In 1916, the first signalmen ...
The war resulted in large orders for radio equipment, and the Aldene plant was expanded, with employment in 1917 rising from 200 to 700. [29] Although the overall U.S. government plan was to restore civilian ownership of the seized radio stations once the war ended, many Navy officials hoped to retain a monopoly on radio communication after the ...
The introduction of radio telegraphy was a significant step in communication during World War I. The stations utilized at that time were spark-gap transmitters . As an example, the information of the start of World War I was transmitted to German South West Africa on 2 August 1914 via radio telegraphy from the Nauen transmitter station via a ...
TM 11-487 Electrical Communication systems Equipment. dated 2 October 1944 TM 11-487-C1 military standardization handbook dated 1965 T/O&E 44-16 , Headquarters and Headquarters Battery, Antiaircraft Artillery Gun Battalion, Mobile, dated 17 November 1944
Use of the Eiffel Tower as a listening station to intercept wireless telegraphy (French: télégraphie sans fil T.S.F.) 1914 British radio listening station from the Second World War, equipped with the National HRO shortwave radio receivers The radomes of listening station RAF Menwith Hill, England, often referred to as "golf balls", protect the parabolic antennas from the weather.
During World War One, the U.S. Navy purchased Federal Telegraph, but after the end of the war a displeased U.S. Congress ordered the Navy to return the company to its original owners. [2] The company was acquired in August 1927 by the Mackay Companies, and was renamed the Mackay Radio and Telegraph Company (California). [3]
The Radio tractor was a mobile Signal Corps Radio used by the U.S. Army for ground communications before and during World War I. Prior to World War I, trucks were referred to as "tractors", and there were also telegraph tractors, and telephone tractors.