Despite FM having been patented in 1933, commercial FM broadcast did not begin until the late 1930s, when it was started by a handful of pioneer raw stations, including W8HK, Buffalo, New York (now WTSS); W1XOJ / WGTR / RLS, Paxton, Massachusetts (now listed as Worcester, Massachusetts); W1XSL / W1XPW / WDRC-FM, Meriden, Connecticut (now WHCN); W2XMN / KE2XCC / WFMN, Alpine, New Jersey (Edwin Property Armstrong us, closed after Armstrong’s death in 1954); W2XQR / WQXQ / WQXR-FM, New York; W47NV Nashville, Tennessee (signed 1951); W1XER / W39B / WMNE, whose studies were in Boston, but whose transmitter was above the highest mountain in the northeastern United States, Mount Washington, New Hampshire (closed 1948); W9XAO Milwaukee, Wisconsin (then WTMJ-FM out of the air in 1950, back in 1959 to another frequency). Also worth noting are the General Electric W2XDA Schenectady stations and W2XOY Nova Scotia, New York-two experimental frequency modulation transmitters of 48.5 MHz, which signed in 1939. Both were merged into a station using the letters call W2XOY 20 November 1940, with the station taking WGFM call letters a few years later, and moving 99.5 MHz when the FM band was transferred to the spectrum shares 88-108 MHz. General Electric sold the station in 1980, and today the station is called WRVE.
On June 1, 1961, at 00:01 (EDT), WGEM-FM became the first FM station in the United States to broadcast in stereo.
The first commercial FM broadcasters were in the United States, but were first used primarily to broadcast their AM sister station simultaneously, transmitting lush orchestral music to stores and offices, transmitting classical music to an audience of Luxury in urban areas, or for educational programming purposes. By the end of 1960, FM had been adopted by “alternative rock” (“AOR-OrientedAlbum Format Rock”) fans, but it was not until 1978 that FM stations exceeded those of AM America North. During the 1980s and 1990s, Top 40 music stations and country music stations later largely abandoned AM to FM. AM today is mainly the prerogative of radio talk, news, sports, religious, ethnic (minority language) broadcasting and certain types of minority music interests. This change turned AM into the “alternative group” that the FM was once. (Some AM stations have started broadcasting simultaneously on, or switching to, FM signals to attract younger listeners and difficulty who receive help in buildings during storms, and near high voltage cables. These stations now focus on their presence on the FM dial.)