History of Radio and TV

By abracco

  • Heinrich Rudolf Hertz

    Heinrich Rudolf Hertz
    Hertz was able to prove Maxwell's theory of electromagnetism through an experiment.

  • Guglielmo Marconi

    Guglielmo Marconi
    Marconi built the fist successful wireless telegraphy system.

  • Roberto Landell de Moura

    Roberto Landell de Moura
    Roberto Landell de Moura wirelessly transmitted the human voice for a half mile.

  • Radio Factory

    Radio Factory
    Marconi built the first purpose-built radio factory in Chelmsford, England.

  • First Radio Broadcast

    First Radio Broadcast
    The first radio news program was broadcasted in Detroit, Michigan.

  • Single Sideband and Frequency Modulation

    Single Sideband and Frequency Modulation
    Single sideband and frequency modulation were invented by radio operators.

  • Mobile Telephone Service

    Mobile Telephone Service
    AT&T commercialized the Mobile Telephone Service. AT&T started commercializing this in St. Louis by introducing the Mobile Telephone Service into hundreds of towns and cities.

  • Pocket Transistor Radio

    Pocket Transistor Radio
    The Regency Company introduced the pocket transistor radio.

  • Color Television

    Color Television
    Color television was broadcasted commercially by 1963.

  • Loran

    Loran
    In the 1970s, Loran became the leading radio navigation system.

  • GPS

    GPS
    The U.S. Navy experimented with satellite navigation and soon created the GPS constellation.

  • Audio Cards

    Audio Cards
    In the 1990s, radio experimenters began to use computers with audio cards to process radio signals.

  • Internet Radio

    Internet Radio
    In 2003, revenue for online radio was $49 million, then it grew to $500 million in 2006.