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1 megawatt Poulsen arc transmitter used by the U.S. Navy around 1918 in shore radio stations to communicate with its fleet worldwide, one of the largest arc transmitters ever built. The arc converter , sometimes called the arc transmitter , or Poulsen arc after Danish engineer Valdemar Poulsen who invented it in 1903, [ 1 ] [ 2 ] was a variety ...
RT-1939/ARC-210 fifth generation receiver/transmitter unit. The ARC-210 is a family of radios for military aircraft that provides two-way, multi-mode voice and data communications over a 30 to 512+ MHz frequency range. It covers both Ultra High Frequency (UHF) and Very High Frequency (VHF) bands with AM, FM and SATCOM capabilities. [1]
The Borg also show an interest in Jack Crusher, the son of Picard and Beverly Crusher, as he also carries Borg DNA inherited from his father, although his more developed genes make him a transmitter instead, resulting in Jack hearing the Collective in his head throughout his life. He is also assimilated, becoming Vox.
Teletraan I, intelligent starship computer inside the Autobots' Ark spaceship that awakens the robot, from Transformers animated television series, (1984) Edgar , from Steve Barron's movie Electric Dreams (film) (1984) Ghostwheel, built by Merlin in Roger Zelazny's Chronicles of Amber. A computer with esoteric environmental requirements ...
[1] [2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era, the first three decades of radio, from 1887 to the end of World War I. [3] [4] German physicist Heinrich Hertz built the first experimental spark-gap transmitters in 1887, with which he proved the ...
A radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. Radio waves are electromagnetic waves with frequencies between about 30 Hz and 300 GHz. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the ...
A broadcast transmitter is an electronic device which radiates radio waves modulated with information content intended to be received by the general public. Examples are a radio broadcasting transmitter which transmits audio (sound) to broadcast radio receivers (radios) owned by the public, or a television transmitter, which transmits moving images to television receivers (televisions).
The transmitter was replaced with a 100 kW quenched-spark transmitter, the most powerful transmitter in the world at the time. [5] The omnidirectional umbrella antenna was replaced by a 1,037-meter (3,402 ft) long directional flattop antenna consisting of 20 parallel horizontal wires supported by five 120-meter (390 ft) towers, pointed at ...