History of radio and tv

By wharkness555

  • 1880

    1880
    Hertz sent electro magnetic waves

  • 1890

    1890
    Marconi invented wireless telegraphing

  • 1900

    1900
    Roberto Landell transmitted human voice over half a mile

  • 1910

    1910
    Marconi built first radio factory

  • 1920

    1920
    first radio news program

  • 1930

    1930
    single sideband and frequency modulation were invented

  • 1940

    1940
    Commercial television transmissions started in North America and Europe in the 1940s.

  • 1950

    1950
    the Regency company introduced a pocket transistor radio, the TR-1, powered by a "standard 22.5 V Battery."

  • 1960

    1960
    In the early 1960s, VOR systems finally became widespread for aircraft navigation; before that, aircraft used commercial AM radio stations for navigation. (AM stations are still marked on U.S. aviation charts).

  • 1970

    1970
    first mobile cellphone

  • 1980

    1980
    The GPS was created

  • 1990

    1990
    malamud launches the first talk radio

  • 2000

    2000
    CRB decided to have a $500 minimum fee per station

  • 2010

    2010
    CRB makes web casters also pay $500