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On March 1, 1941 W47NV began broadcasting in Nashville, Tennessee, [8] becoming the first fully licensed commercial FM station. [9] There was significant interest in the new FM band by station owners, however, construction restrictions that went into place during World War II limited the growth of the new service.
The AM-to-FM phenomenon began primarily in mid-sized markets, where there is more bandwidth and less competition, but has since progressed to large cities including New York City, where as of 2012 sports-talk AM stations WEPN and WFAN have both acquired FM stations with the intent to either move or simulcast their AM programming. By 2013 most ...
The stations owned by manufacturers and department stores were established to sell radios and those owned by newspapers to sell papers and express the opinions of the owners. 31 August 1920: The first known radio news program was broadcast by station 8MK, the unlicensed predecessor of WWJ (AM) in Detroit, Michigan.
Regularly scheduled broadcasts of voice and music began in January 1921. That station is still on the air today as WHA. [93] On August 20, 1920, 8MK, began broadcasting daily and was later claimed by famed inventor Lee de Forest as the first commercial station. 8MK was licensed to a teenager, Michael DeLisle Lyons, and financed by E. W. Scripps.
An experimental FM station, FM 90.7, was broadcast in Whakatane in early 1982. Later that year, Victoria University of Wellington's Radio Active began full-time FM transmissions. Commercial FM licences were finally approved in 1983, with Auckland-based 91FM and 89FM being the first to take up the offer. Broadcasting was deregulated in 1989.
Of the stations listed by Pierre Key, KZFM was the strongest, with 50,000 watts. [48] Two radio networks were ultimately created: one, the Manila Broadcasting Company, began as a single station, KZRH in Manila, in July 1939, and after World War II, in 1946, the station's owners began to develop their network by buying other radio properties.
Before the early 1950s, when radio networks and local stations wanted to preserve a live broadcast, they did so by means of special phonograph records known as "electrical transcriptions" (ETs), made by cutting a sound-modulated groove into a blank disc. At first, in the early 1930s, the blanks varied in both size and composition, but most ...
Title 47 is extremely diverse in what it controls. Radio broadcasts consist of amplitude modulation (AM) and frequency modulation (FM) stations, noncommercial radio stations, and low-powered broadcast stations, to name a few, all are administrated by the policies in Title 47 of the Code of Federal Regulations. [5]