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  2. FM broadcasting - Wikipedia

    en.wikipedia.org/wiki/FM_broadcasting

    It belongs to FM radio station KWNR, in Henderson, Nevada, and broadcasts at 95.5 MHz. FM broadcasting is a method of radio broadcasting that uses frequency modulation ( FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio.

  3. AM broadcasting - Wikipedia

    en.wikipedia.org/wiki/AM_broadcasting

    AM broadcasting. AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.

  4. FM broadcasting in the United States - Wikipedia

    en.wikipedia.org/wiki/FM_broadcasting_in_the...

    FM radio channel assignments in the U.S. In the United States, FM broadcasting stations operate on a 20.2 MHz-wide frequency band, spanning from 87.8 MHz to 108 MHz. This is divided into 101 0.2 MHz-wide channels, which are designated as channels 200 through 300. In actual practice, few except the FCC use these channel numbers; the frequencies ...

  5. Philadelphia Phillies Radio Network - Wikipedia

    en.wikipedia.org/wiki/Philadelphia_Phillies...

    The Philadelphia Phillies Radio Network is a network of 21 radio stations in Pennsylvania, Delaware, and New Jersey that air Major League Baseball games of the Philadelphia Phillies. [1] The lead announcers are Scott Franzke with play-by-play and Larry Andersen with color commentary. [2] The flagship station is WIP-FM 94.1 in Philadelphia.

  6. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    Type 'C' Form 'A' twin detector crystal radio set, manufactured by British Thomson Houston Ltd. in 1924, kept at the Museum of the radio - Monteceneri (Switzerland) Early radio telegraphy used spark gap and arc transmitters as well as high-frequency alternators running at radio frequencies. The coherer was the first means of detecting a radio ...

  7. Weltron - Wikipedia

    en.wikipedia.org/wiki/Weltron

    2010 – a portable AM/FM audio receiver with 8-track player/recorder (c. 1977) XX-10 – a portable AM/FM audio receiver with compact cassette recorder; 37-009 – AM radio headphones; 37-001w – headphones; 37-002 – headphones; Model 2007 was demonstrated at the 1975 Winter Consumer Electronics Show, with a price of $399 (equivalent to ...

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