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Radio control (often abbreviated to RC) is the use of control signals transmitted by radio to remotely operate a device. Examples of simple radio control systems are garage door openers and keyless entry systems for vehicles, in which a small handheld radio transmitter unlocks or opens doors. Radio control is also used for control of model ...
[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 ...
The Alexanderson alternator followed Fessenden's rotary spark-gap transmitter as the second radio transmitter to be modulated to carry the human voice. Until the invention of vacuum-tube (valve) oscillators in 1913 such as the Armstrong oscillator , the Alexanderson alternator was an important high-power radio transmitter , and allowed ...
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
Pages in category "Radio-controlled transmitter" The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes. F.
[24] [25] [26] Introduced in the year 2000, the radio was known for its "all-in-one" functionality. It can transmit on all amateur radio bands between 160 meters and 70 centimeters, with the exception of the 1.25 meters band, and the "X" model also has built-in 23 centimeters band capability option. Kenwood discontinued production of the TS ...
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Kraft Systems, Inc., was an American electronics company based in San Diego County, California, and active from 1962 to 1994.The company was founded by Philip O. Kraft and began as a manufacturer of transmitters for radio-controlled models, namely RC aircraft.
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