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Reliable radio control uses bands dedicated to the purpose. Radio-controlled toys may use portions of unlicensed spectrum in the 27 MHz or 49 MHz bands, but more costly aircraft, boat, or land vehicle models use dedicated radio control frequencies near 72 MHz to avoid interference by unlicensed uses. The 21st century has seen a move to 2.4 GHz ...
As of 2006, approximately eighty radio stations are electronically monitored twenty-four hours a day and seven days a week by Nielsen Broadcast Data Systems. Songs are ranked by a calculation of the total number of spins per week with its "audience impression", which is based upon exact times of airplay and each station's Arbitron listener data.
Commercial and Government Radio Stations of the U.S. (6/30/1927), pages 87–92 7/1/1927 Call letters: Annual Report of the FRC (6/30/1927), pages 55–64 11/1/1927 Frequency: Jurisdiction of Radio Commission (2/1928), pages 14–17 Frequencies from 600 to 1000 kHz 12/1/1927 Frequency: Jurisdiction of Radio Commission (2/1928), pages 10–12
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Narrow band Frequency Modulation was developed and demonstrated by Hanso Idzerda in 1919. Wide band Frequency modulation radio originated in the United States during the 1930s; the system was developed by the American electrical engineer Edwin Howard Armstrong. However, FM broadcasting did not become widespread, even in North America, until the ...
Radio America is a rock group based in New York City, currently signed to Mother West records by Charles Newman (member of Flare and producer/engineer of The Magnetic Fields, "Lemony Snicket," We Are Scientists, Kris Gruen, Lori Michaels, the Bowmans, Earlymay, etc.)
Pages in category "Lists of radio stations by frequency" The following 200 pages are in this category, out of approximately 338 total. This list may not reflect recent changes .