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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 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 ...
With the rise of easily-intercepted wireless telegraphy, codes and ciphers were used extensively in World War I. The decoding by British Naval intelligence of the Zimmermann telegram helped bring the United States into the war. Trench codes were used by field armies of most of the combatants (Americans, British, French, German) in World War I. [1]
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.
After World War II, FM radio broadcasting was introduced in Germany. At a meeting in Copenhagen in 1948, a new wavelength plan was set up for Europe. Because of the recent war, Germany (which did not exist as a state and so was not invited) was only given a small number of medium-wave frequencies, which were not very good for broadcasting.
Before the development of radar and other electronics techniques, signals intelligence (SIGINT) and communications intelligence (COMINT) were essentially synonymous. Sir Francis Walsingham ran a postal interception bureau with some cryptanalytic capability during the reign of Elizabeth I, but the technology was only slightly less advanced than men with shotguns, during World War I, who jammed ...
The Radio Materiel School (RMS) was the first electronics training facility of America's military organizations. Operated by the United States Navy, it produced during the 1920s and 1930s the core of senior maintenance specialists for the Navy's communication equipment, that according to USN fleet admiral Chester W. Nimitz "paved the way to United States world leadership in electronics."
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.