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History of radio - Wikipedia
Between 1890 and 1892 physicists such as John Perry, Frederick Thomas Trouton and William Crookes proposed electromagnetic or Hertzian waves as a navigation aid or means of communication, with Crookes writing on the possibilities of wireless telegraphy based on Hertzian waves in 1892. Among physicist, what were perceived as technical limitations to using these new waves, such as delicate equipment, the need for large amounts of power to transmit over limite…
Wikipedia · Text under CC-BY-SA licenseRadio Equipment Directive (2014) - Wikipedia
- This directive was published on 16 April 2014. It replaced the previous directive R&TTE 1999/5/EC as of 13 June 2016.Equipment must be compliant with the new directive in order to be authorized to be placed on the market from 12 June 2017 and onward. As approved by the European Commission, the directive contains legal definitions for the essential ...
Radio receiver - Wikipedia
WEBIn radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used …
List of radios - Wikipedia
WEBThis is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, …
Radio broadcasting - Wikipedia
WEBRadio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast …
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Category:Radio electronics - Wikipedia
WEBFor articles related to systems or entire pieces of equipment used in broadcasting, consider Category:Radio. For example, articles about master control, translators, Optimod …
Two-way radio - Wikipedia
WEBVHF marine radio on a ship Two-way radio in a fire truck used by firefighters to communicate with their dispatcher. The first truly mobile two-way radio equipment was …
Radio - Simple English Wikipedia, the free encyclopedia
WEBRadio was first created as a way to send telegraph messages between two people without wires. Then two-way radio brought voice communication, including walkie-talkies and …
Radio frequency - Wikipedia
WEBRadio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] …
Radio - Engineering and Technology History Wiki - ETHW
WEBApr 2, 2019 · Radio began in 1888 when German physicist Heinrich Hertz demonstrated the existence of radio waves (the unit of measurement for radio wave frequency was named …
Who Invented the Radio? The Full Story of Guglielmo Marconi …
WEBOct 4, 2023 · Its invention is credited to an Italian electrical engineer, Guglielmo Marconi. Marconi’s revolutionary invention opened new avenues for transmitting information …
Radio | Definition, History, & Facts | Britannica
WEBRadio, sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of …
Radio and digital radio | How it works | AM and FM compared
WEBMay 20, 2022 · A radio is a box filled with electronic components that catches radio waves sailing through the air, a bit like a baseball catcher's mitt, and converts them back into …
Radio Equipment Directive (RED) - European Commission
WEBThe radio equipment directive 2014/53/EU (RED) establishes a regulatory framework for placing radio equipment on the market. It ensures a single market for radio equipment …
MCI Communications - Wikipedia
WEBMCI Communications Corporation (originally Microwave Communications, Inc.) was a telecommunications company headquartered in Washington, D.C. that was at one point …
Radio telescope - Wikipedia
WEBA radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. [1][2][3] Radio telescopes are the main …
Pye Story - Radio
WEBRadio. The following are some of the landmark radio products designed and manufactured by the Pye Company. For a comprehensive and descriptive listing of Pye Consumer …
radio summary | Britannica
WEBradio, Electromagnetic radiation of lower frequency (hence longer wavelength) than visible light or infrared radiation, and consisting of the range of frequencies used for …
Where’s That Radio? A Brief History Of Direction Finding
WEBAug 19, 2021 · Radio navigation owes a lot to ordinary celestial navigation and surveying. Instead of sighting a lighthouse, the sun, or a star, you sight a radio transmitter.
Broadcasting | Definition, History, Types, Systems, Examples,
WEBbroadcasting, electronic transmission of radio and television signals that are intended for general public reception, as distinguished from private signals that are directed to …
Emerson Electric - Wikipedia
WEBEmerson was established in 1890 in St. Louis, Missouri, as Emerson Electric Manufacturing Co. by Civil War Union veteran John Wesley Emerson to manufacture electric motors …
List of radio stations in Missouri - Wikipedia
WEBThe following is a list of FCC -licensed radio stations in the U.S. state of Missouri, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming …