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.