144 relations: Alexanderson alternator, All-news radio, Alternator, AM expanded band, Amateur radio, AMAX, Amplitude modulation, Amplitude modulation signalling system, Apex (radio band), Arc converter, AT&T, Bandwidth (signal processing), BBC, BBC National Programme, BBC Regional Programme, British Broadcasting Company, C-QUAM, CAM-D, Carbon microphone, Carrier current, Carrier wave, CBS, Charles Herrold, Chelmsford, Children's television series, Christmas Eve, CINW, Communism, Continuous wave, Crystal detector, Crystal radio, Daily Mail, Damped wave, Digital audio broadcasting, Digital Radio Mondiale, Diode, Eiffel Tower, Electrolytic detector, Electromagnetic induction, Electromagnetic interference, Electromagnetic radiation, Enrico Caruso, Ernst Alexanderson, Fascism, Federal Communications Commission, Fireside chats, Fleming valve, FM broadcast band, FM broadcasting, Frank Conrad, ..., Franklin D. Roosevelt, Frequency response, Game show, General Electric, Geraldine Farrar, Golden Age of Radio, Great Depression, Great White Fleet, Greenleaf Whittier Pickard, Harris Corporation, Hazeltine Corporation, HD Radio, Headphones, Hertz, High fidelity, High frequency, History of radio, IBiquity, Independent sideband, International Telecommunication Union, ITU Radio Regulations, ITU Region, John Ambrose Fleming, KDKA (AM), KZY, Lee de Forest, List of 50 kW AM radio stations in the United States, List of oldest radio stations, List of radio stations in the Americas, Longwave, Loudspeaker, Low frequency, LP record, Magnavox, Medium frequency, Medium wave, Microbroadcasting, Microphone, Morse code, Motorola, Mutual Broadcasting System, MW DX, Nathan Stubblefield, National Radio Systems Committee, NBC, Nellie Melba, New Year's Eve, New York Journal-American, Noise (radio), Oliver Lodge, PCGG, Phase modulation, Pirate radio, Propaganda, Quirino Majorana, Radio 2XG, Radio advertisement, Radio broadcasting, Radio drama, Radio format, Radio network, Radiotelephone, RCA, Red Barber, Rediffusion, Reginald Fessenden, Satellite radio, Shortwave bands, Shortwave radio, Sideband, Single-sideband modulation, Sitcom, Soap opera, Spark-gap transmitter, Sports radio, Stereophonic sound, Talk radio, Telephone newspaper, Television, Television licence, Telharmonium, The Detroit News, Title 47 CFR Part 15, Transistor, Transistor radio, United States presidential election, 1916, Vacuum tube, Valdemar Poulsen, Variety show, Voltage, WABC (AM), Westinghouse Electric Corporation, WFAN (AM), WWJ (AM). Expand index (94 more) » « Shrink index
An Alexanderson alternator is a rotating machine invented by Ernst Alexanderson in 1904 for the generation of high-frequency alternating current for use as a radio transmitter.
All-news radio is a radio format devoted entirely to the discussion and broadcast of news.
An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current.
The extended mediumwave broadcast band, commonly known as the expanded band, is a broadcast frequency allocation.
Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.
AMAX is an American certification program developed by the Electronic Industries Association (EIA) and the National Association of Broadcasters (NAB) in 1993.
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
The amplitude modulation signalling system (AMSS or the AM signalling system) is a digital system for adding low bit rate information to an analogue amplitude modulated broadcast signal in the same manner as the Radio Data System (RDS) for frequency modulated (FM) broadcast signals.
Apex radio stations (also known as skyscraper and pinnacle) was the name commonly given to a short-lived group of United States broadcasting stations, which were used to evaluate transmitting on frequencies that were much higher than the ones used by standard amplitude modulation (AM) and shortwave stations.
The arc converter, sometimes called the arc transmitter, or Poulsen arc after Danish engineer Valdemar Poulsen who invented it in 1903, was a variety of spark transmitter used in early wireless telegraphy.
AT&T Inc. is an American multinational conglomerate holding company headquartered at Whitacre Tower in Downtown Dallas, Texas.
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
The British Broadcasting Corporation (BBC) is a British public service broadcaster.
The BBC National Programme was a UK radio broadcasting service which was on the air from 9 March 1930 – when it replaced the earlier BBC radio station 5XX – until 1 September 1939, when it was subsumed into the BBC Home Service, two days before the outbreak of World War II.
The BBC Regional Programme was a UK radio broadcasting service which was on the air from 9 March 1930 – when it replaced a number of earlier BBC local stations – until 1 September 1939, when it was subsumed into the BBC Home Service, two days before the outbreak of World War II.
The British Broadcasting Company Ltd (BBC) was a British commercial company formed on 18 October 1922 by British and American electrical companies doing business in the United Kingdom (and anxious to build sales of their products by ensuring that there were radio broadcasts to which their radio-buying customers could listen) and licensed by the British General Post Office.
C-QUAM is the method of AM stereo broadcasting used in Canada, the United States and most other countries.
Compatible Amplitude Modulation - Digital or CAM-D is a hybrid digital radio format for AM broadcasting, proposed by broadcast engineer Leonard R. Kahn.
The carbon microphone, also known as carbon button microphone, button microphone, or carbon transmitter, is a type of microphone, a transducer that converts sound to an electrical audio signal.
Carrier current transmission (originally called wired wireless) employs guided low-power radio signals, which are transmitted along electrical conductors.
In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.
CBS (an initialism of the network's former name, the Columbia Broadcasting System) is an American English language commercial broadcast television network that is a flagship property of CBS Corporation.
Charles David "Doc" Herrold (November 16, 1875 – July 1, 1948) was an American inventor and pioneer radio broadcaster, who began experimenting with audio radio transmissions in 1909.
Chelmsford is the principal settlement of the City of Chelmsford district, and the county town of Essex, in the East of England.
A children's television series, or children's show, is a television show designed and marketed to children, normally scheduled for broadcast during the morning and afternoon, when children are usually awake.
Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.
CINW was the final call sign used by an English language AM radio station located in Montreal, Quebec, which, along with French-language sister station CINF, ceased operations at 7:00 p.m. ET on January 29, 2010.
In political and social sciences, communism (from Latin communis, "common, universal") is the philosophical, social, political, and economic ideology and movement whose ultimate goal is the establishment of the communist society, which is a socioeconomic order structured upon the common ownership of the means of production and the absence of social classes, money and the state.
A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, almost always a sine wave, that for mathematical analysis is considered to be of infinite duration.
A crystal detector is an obsolete electronic component in some early 20th century radio receivers that used a piece of crystalline mineral as a detector (demodulator) to rectify the alternating current radio signal to extract the audio modulation which produced the sound in the earphones.
A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio.
The Daily Mail is a British daily middle-marketPeter Wilby, New Statesman, 19 December 2013 (online version: 2 January 2014) tabloid newspaper owned by the Daily Mail and General Trust and published in London.
A damped wave is a wave whose amplitude of oscillation decreases with time, eventually going to zero, an exponentially decaying sinusoidal wave.
Digital audio broadcasting (DAB) is a digital radio standard for broadcasting digital audio radio services, used in many countries across Europe, Asia, and the Pacific.
Digital Radio Mondiale (DRM; mondiale being Italian and French for "worldwide") is a set of digital audio broadcasting technologies designed to work over the bands currently used for analogue radio broadcasting including AM broadcasting, particularly shortwave, and FM broadcasting.
A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.
The Eiffel Tower (tour Eiffel) is a wrought iron lattice tower on the Champ de Mars in Paris, France.
The electrolytic detector, or liquid barretter, was a type of detector (demodulator) used in early radio receivers.
Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.
Enrico Caruso (25 February 1873 – 2 August 1921) was an Italian operatic tenor.
Ernst Frederick Werner Alexanderson (January 25, 1878 – May 14, 1975) was a Swedish-American electrical engineer, who was a pioneer in radio and television development.
Fascism is a form of radical authoritarian ultranationalism, characterized by dictatorial power, forcible suppression of opposition and control of industry and commerce, which came to prominence in early 20th-century Europe.
The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (and) to regulate interstate communications by radio, television, wire, satellite, and cable.
The fireside chats were a series of 31 evening radio addresses given by U.S. President Franklin D. Roosevelt (known colloquially as "FDR") between 1933 and 1944.
The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve or vacuum tube invented in 1904 by Englishman John Ambrose Fleming as a detector for early radio receivers used in electromagnetic wireless telegraphy.
The FM broadcast band, used for FM broadcast radio by radio stations, differs between different parts of the world.
FM broadcasting is a method of radio broadcasting using frequency modulation (FM) technology.
Frank Conrad (May 4, 1874 – December 10, 1941) was an electrical engineer, best known for radio development, including his work as a pioneer broadcaster.
Franklin Delano Roosevelt Sr. (January 30, 1882 – April 12, 1945), often referred to by his initials FDR, was an American statesman and political leader who served as the 32nd President of the United States from 1933 until his death in 1945.
Frequency response is the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
A game show is a type of radio, television, or stage show in which contestants, individually or as teams, play a game which involves answering questions or solving puzzles, usually for money or prizes.
General Electric Company (GE) is an American multinational conglomerate incorporated in New York and headquartered in Boston, Massachusetts.
Alice Geraldine Farrar (February 28, 1882 – March 11, 1967) was an American soprano opera singer and film actress, noted for her beauty, acting ability, and "the intimate timbre of her voice." She had a large following among young women, who were nicknamed "Gerry-flappers".
The old-time radio era, sometimes referred to as the Golden Age of Radio, was an era of radio programming in the United States during which radio was the dominant electronic home entertainment medium.
The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States.
The Great White Fleet was the popular nickname for the powerful United States Navy battle fleet that completed a journey around the globe from 16 December 1907, to 22 February 1909, by order of United States President Theodore Roosevelt.
Greenleaf Whittier Pickard (February 14, 1877, Portland, Maine – January 8, 1956, Newton, Massachusetts) was a United States radio pioneer.
Harris Corporation is an American technology company, defense contractor and information technology services provider that produces wireless equipment, tactical radios, electronic systems, night vision equipment and both terrestrial and spaceborne antennas for use in the government, defense and commercial sectors.
Hazeltine Corporation was a defense electronics company which is now part of BAE Systems Inc.
HD Radio is a trademarked term for iBiquity's in-band on-channel (IBOC) digital radio technology used by AM and FM radio stations to transmit audio and data by using a digital signal embedded "on-frequency" immediately above and below a station's standard analog signal, providing the means to listen to the same program in either HD (digital radio with less noise) or as a standard broadcast (analog radio with standard sound quality).
Headphones (or head-phones in the early days of telephony and radio) are a pair of small loudspeaker drivers worn on or around the head over a user's ears.
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
High fidelity (often shortened to hi-fi or hifi) is a term used by listeners, audiophiles and home audio enthusiasts to refer to high-quality reproduction of sound.
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
The early history of radio is the history of technology that produces and uses radio instruments that use radio waves.
iBiquity Digital Corporation is a company formed by the merger of USA Digital Radio and Lucent Digital Radio, with the goal of creating an in-band on-channel (IBOC) digital radio system for the United States and around the world.
Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions.
The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.
The ITU Radio Regulations (short: RR) regulates on law of nations scale radiocommunication services and the utilisation of radio frequencies.
The International Telecommunication Union (ITU), in its International Radio Regulations, divides the world into three ITU regions for the purposes of managing the global radio spectrum.
Sir John Ambrose Fleming FRS (29 November 1849 – 18 April 1945), an English electrical engineer and physicist, invented the first thermionic valve or vacuum tube, and also established the left-hand rule for electric motors.
KDKA (1020 kHz AM) is a Class A (clear channel) radio station, owned and operated by Entercom and licensed to Pittsburgh, Pennsylvania.
KZY was a radio station located in Oakland, California, that was licensed to the Atlantic-Pacific Radio Supplies Company from December 9, 1921 until its deletion on January 24, 1923.
Lee de Forest (August 26, 1873 – June 30, 1961) was an American inventor, self-described "Father of Radio", and a pioneer in the development of sound-on-film recording used for motion pictures.
The following is a list of radio stations in the United States that are authorized to run 50 kW (50,000 watts) of power.
It is generally recognised that the first radio transmission was made from a temporary station set up by Guglielmo Marconi in 1895.
This is a list of radio stations in the Americas.
In radio, longwave, long wave or long-wave, and commonly abbreviated LW, refers to parts of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band.
A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound.
Low frequency (low freq) or LF is the ITU designation for radio frequencies (RF) in the range of 30 kilohertz (kHz)–300 kHz.
The LP (from "long playing" or "long play") is an analog sound storage medium, a vinyl record format characterized by a speed of rpm, a 12- or 10-inch (30 or 25 cm) diameter, and use of the "microgroove" groove specification.
Magnavox (Latin for "great voice") (stylized as MAGNAVOX) is an American electronics company founded in the United States.
Medium frequency (MF) is the ITU designation for radio frequencies (RF) in the range of 300 kilohertz (kHz) to 3 megahertz (MHz).
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting.
Microbroadcasting is the process of broadcasting a message to a relatively small audience.
A microphone, colloquially nicknamed mic or mike, is a transducer that converts sound into an electrical signal.
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
Motorola, Inc. was an American multinational telecommunications company founded on September 25, 1928, based in Schaumburg, Illinois.
The Mutual Broadcasting System (commonly referred to simply as Mutual; sometimes referred to as MBS, Mutual Radio or the Mutual Radio Network; corporate name Mutual Broadcasting System, Inc.) was an American commercial radio network in operation from 1934 to 1999.
MW DX, short for mediumwave DXing, is the hobby of receiving distant mediumwave (known as AM in North America) radio stations.
Nathan Beverly Stubblefield (November 22, 1860 – March 28, 1928), self-described "practical farmer, fruit grower and electrician",, The Sunny South, March 8, 1902, page 6.
The National Radio Systems Committee (NRSC) is an organization sponsored by the Consumer Technology Association (CTA) and the National Association of Broadcasters (NAB).
The National Broadcasting Company (NBC) is an American English language commercial broadcast television network that is a flagship property of NBCUniversal, a subsidiary of Comcast.
Dame Nellie Melba GBE (born Helen Porter Mitchell; 19 May 186123 February 1931) was an Australian operatic soprano.
In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.
The New York Journal-American was a daily newspaper published in New York City from 1937 to 1966.
In radio reception, noise is the superposition of white noise and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from radiated electromagnetic noise picked up by the receiver's antenna.
Sir Oliver Joseph Lodge, (12 June 1851 – 22 August 1940) was a British physicist and writer involved in the development of, and holder of key patents for, radio.
PCGG (also known as the Dutch Concerts station) was a radio station located at The Hague in the Netherlands, which began broadcasting a regular schedule of entertainment programmes on 6 November 1919.
Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.
Pirate radio or a pirate radio station is a radio station that broadcasts without a valid license.
Propaganda is information that is not objective and is used primarily to influence an audience and further an agenda, often by presenting facts selectively to encourage a particular synthesis or perception, or using loaded language to produce an emotional rather than a rational response to the information that is presented.
Quirino Majorana (28 October 1871 – 31 July 1957) was an Italian experimental physicist who investigated a wide range of phenomena during his long career as professor of physics at the Universities of Rome, Turin (1916–1921), and Bologna (1921–1934), Italy.
Radio station 2XG, also known as the "Highbridge station", was an experimental station located in New York City and licensed to the De Forest Radio Telephone and Telegraph Company from 1915-1917 and 1920-1924.
In the United States, commercial radio stations make most of their revenue by selling airtime to be used for running radio advertisements.
Radio broadcasting is transmission by radio waves intended to reach a wide audience.
Radio drama (or audio drama, audio play, radio play, radio theater, or audio theater) is a dramatized, purely acoustic performance.
A radio format or programming format (not to be confused with broadcast programming) describes the overall content broadcast on a radio station.
There are two types of radio networks currently in use around the world: the one-to-many broadcast network commonly used for public information and mass media entertainment; and the two-way radio type used more commonly for public safety and public services such as police, fire, taxicabs, and delivery services.
A radiotelephone (or radiophone) is a communications system for transmission of speech over radio.
The RCA Corporation was a major American electronics company, which was founded as the Radio Corporation of America in 1919.
Walter Lanier "Red" Barber (February 17, 1908 – October 22, 1992) was an American sports commentator.
Rediffusion was a business that distributed radio and TV signals through wired relay networks.
Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born inventor, who did a majority of his work in the United States and also claimed U.S. citizenship through his American-born father.
Satellite radio is defined by the International Telecommunication Union (ITU)'S ITU Radio Regulations (RR) as a broadcasting-satellite service.
Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper MF band and all of the HF band).
Shortwave radio is radio transmission using shortwave radio frequencies.
In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process.
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.
A sitcom, short for "situation comedy", is a genre of comedy centered on a fixed set of characters who carry over from episode to episode.
A soap opera or soaper is an ongoing, episodic work of fiction presented in serial format on television, radio and in novels, featuring the lives of many characters and focusing on emotional relationships to the point of melodrama.
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.
Sports radio (or sports talk radio) is a radio format devoted entirely to discussion and broadcasting of sporting events.
Stereophonic sound or, more commonly, stereo, is a method of sound reproduction that creates an illusion of multi-directional audible perspective.
Talk radio is a radio format containing discussion about topical issues and consisting entirely or almost entirely of original spoken word content rather than outside music.
Telephone Newspapers, introduced in the 1890s, transmitted news and entertainment to subscribers over telephone lines.
Television (TV) is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in colour, and in two or three dimensions and sound.
A television licence or broadcast receiving licence is a payment required in many countries for the reception of television broadcasts, or the possession of a television set where some broadcasts are funded in full or in part by the licence fee paid.
The Telharmonium (also known as the Dynamophone) was an early electrical organ, developed by Thaddeus Cahill circa 1896 and patented in 1897.
The Detroit News is one of the two major newspapers in the U.S. city of Detroit, Michigan.
Code of Federal Regulations, Title 47, Part 15 (47 CFR 15) is an oft-quoted part of Federal Communications Commission (FCC) rules and regulations regarding unlicensed transmissions.
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
A transistor radio is a small portable radio receiver that uses transistor-based circuitry.
The United States presidential election of 1916 was the 33rd quadrennial presidential election, held on Tuesday, November 7, 1916.
In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.
Valdemar Poulsen (23 November 1869 – 23 July 1942) was a Danish engineer who made significant contributions to early radio technology.
Variety shows, also known as variety arts or variety entertainment, is entertainment made up of a variety of acts including musical performances, sketch comedy, magic, acrobatics, juggling, and ventriloquism.
Voltage, electric potential difference, electric pressure or electric tension (formally denoted or, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points.
WABC (770 AM), known as "77 WABC" is a radio station licensed to New York City and is owned by the broadcasting division of Cumulus Media.
The Westinghouse Electric Corporation was an American manufacturing company.
WFAN, (660 AM, also known as Sports Radio 66 and 101.9 FM or The FAN) is a radio station licensed to New York City and is owned and operated by Entercom.
WWJ, 950 kHz (a regional broadcast frequency), is an all-news AM radio station located in Detroit, Michigan.
A.M. Radio, AM (frequency), AM (radio), AM Broadcasting, AM Radio, AM broadcast, AM broadcast band, AM broadcast radio, AM frequency, AM radio, AM station, Am (frequency), Am Radio, Am radio, Amplitude modulation broadcasting.