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W4XA
W4XA was an "experimental audio broadcasting station" operated by The National Life and Accident Insurance Company in Nashville, Tennessee from 1939 to 1940. It was part of a group of stations informally referred to as "Apex" stations, because it transmitted programming intended for the general public over what was then known as "ultra-high short-wave" frequencies. Although co-owned with AM station WSM, it primarily originated its own programs. W4XA ceased broadcasting in 1940, as station management prepared to inaugurate a new FM station, W47NV. History In the early 1930s, technical advances made it possible to transmit using much higher frequencies than before. It soon became apparent that there were significant differences in the propagation characteristics of various frequency ranges. Signals from shortwave stations, operating roughly in the range from 5 MHz to 20 MHz, were found to be readily reflected by the ionosphere during both the day and at night, resulting i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WSM (AM)
WSM (650 kHz) is a 50,000-watt clear channel AM radio station located in Nashville, Tennessee. It broadcasts a full-time country music format (with classic country and Americana leanings, the latter of which is branded as "Route 650") at 650 kHz and is known primarily as the home of the ''Grand Ole Opry'', the world's longest running radio program. The station's clear channel signal can reach much of North America and nearby countries, especially late at night. It is one of two clear-channel stations in North America, along with CFZM in Toronto, that still primarily broadcast music; as recently as 2020, the station was live and locally originated during the overnight hours, but the overnight host position was eliminated in February 2020. Nicknamed "The Air Castle of the South," it spawned two sister stations on newer mediums: WSM-FM, and television Channel 4 (originally WSM-TV, and now WSMV), both of which were later sold separately. WSM-FM is no longer affiliated with WS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WSM-FM (1941–1951)
WSM-FM was a commercial radio station that was operated by The National Life and Accident Insurance Company in Nashville, Tennessee, United States, beginning on March 1, 1941. Under its original call sign of W47NV, it was described at the time as the first fully licensed commercial FM station in the nation. However, after ten years of financial losses, the station ceased operations on March 15, 1951. History At the time WSM-FM, then W47NV, made its debut broadcast its owner, The National Life and Accident Insurance Company, already had extensive broadcasting experience, beginning with AM station WSM, which it founded in 1925. In addition, the new FM station was in large part the successor to a non-commercial, experimental, high-fidelity AM "Apex" station, W4XA, which operated for two years beginning in 1939."WSM-FM D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (radio Band)
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. Their name came from the tall height of their transmitter antennas, which were needed because coverage was primarily limited to local line-of-sight distances. These stations were assigned to what at the time were described as "ultra-high shortwave" frequencies, between roughly 25 and 44 MHz. They employed amplitude modulation (AM) transmissions, although in most cases using a wider bandwidth than standard broadcast band AM stations, in order to provide high fidelity sound with less static and distortion. In 1937 the Federal Communications Commission (FCC) formally allocated an Apex station band, consisting of 75 transmitting frequencies running from 41.02 to 43.98 MHz. Thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Modulation
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and Run-length limited#FM: .280.2C1.29 RLL, computing. In Analog signal, analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e. the difference between the frequency of the carrier and its center frequency, has a functional relation to the modulating signal amplitude. Digital data can be encoded and transmitted with a type of frequency modulation known as frequency-shift keying (FSK), in which the instantaneous frequency of the carrier is shifted among a set of frequencies. The frequencies may represent digits, such as '0' and '1'. FSK is widely used in computer modems, such as fax modems, telephone caller ID systems, garage door openers, and other low-frequency transmissions. R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Stations Disestablished In 1940
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1939 Establishments In Tennessee
This year also marks the start of the Second World War, the List of wars and anthropogenic disasters by death toll, largest and deadliest conflict in human history. Events Below, the events of World War II have the "WWII" prefix. January * January 1 ** Nazi Germany, Third Reich *** Jews are forbidden to work with Germans. *** The Protection Young Persons Act (Germany), Youth Protection Act was passed on April 30, 1938 and the Working Hours Regulations came into effect. *** The Jews name change decree has gone into effect. ** The rest of the world *** In Spain, it becomes a duty of all young women under 25 to complete compulsory work service for one year. *** First edition of the Vienna New Year's Concert. *** The company of technology and manufacturing scientific instruments Hewlett-Packard, was founded in a garage in Palo Alto, California, by Bill Hewlett, William (Bill) Hewlett and David Packard. This garage is now considered the birthplace of Silicon Valley. *** Sydne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Stations Established In 1939
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defunct Radio Stations In The United States
{{Disambiguation ...
Defunct (no longer in use or active) may refer to: * ''Defunct'' (video game), 2014 * Zombie process or defunct process, in Unix-like operating systems See also * * :Former entities * End-of-life product * Obsolescence Obsolescence is the state of being which occurs when an object, service, or practice is no longer maintained or required even though it may still be in good working order. It usually happens when something that is more efficient or less risky r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Stations In Nashville, Tennessee
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Ole Opry
The ''Grand Ole Opry'' is a weekly American country music stage concert in Nashville, Tennessee, founded on November 28, 1925, by George D. Hay as a one-hour radio "barn dance" on WSM. Currently owned and operated by Opry Entertainment (a division of Ryman Hospitality Properties, Inc.), it is the longest-running radio broadcast in US history. Dedicated to honoring country music and its history, the Opry showcases a mix of famous singers and contemporary chart-toppers performing country, bluegrass, Americana, folk, and gospel music as well as comedic performances and skits. It attracts hundreds of thousands of visitors from around the world and millions of radio and internet listeners. In the 1930s, the show began hiring professionals and expanded to four hours. Broadcasting by then at 50,000 watts, WSM made the program a Saturday night musical tradition in nearly 30 states. In 1939, it debuted nationally on NBC Radio. The Opry moved to a permanent home, the Ryman Auditorium, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunspot Cycle
The solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a nearly periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surface. Over the period of a solar cycle, levels of solar radiation and ejection of solar material, the number and size of sunspots, solar flares, and coronal loops all exhibit a synchronized fluctuation from a period of minimum activity to a period of a maximum activity back to a period of minimum activity. The magnetic field of the Sun flips during each solar cycle, with the flip occurring when the solar cycle is near its maximum. After two solar cycles, the Sun's magnetic field returns to its original state, completing what is known as a Hale cycle. This cycle has been observed for centuries by changes in the Sun's appearance and by terrestrial phenomena such as aurora but was not clearly identified until 1843. Solar activity, driven by b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Announcement Of April 10, 1939 Debut Broadcast Of Nashville, Tennessee Experimental Radio Station W4XA
Announcement may refer to: * "Announcement" (song), a 2008 song by Common * Announcement (computing), a message about a new software version * Campaign announcement A campaign announcement is the formal public launch of a political campaign, often delivered in a speech by the candidate at a political rally. Formal campaign announcements play an important role in United States presidential elections, particu ..., a type of political speech * Public service announcement, a media message in the public interest * Press release, a communication via news media {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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