History of Radio

By Valkyria98

  • Marconi

    Marconi
    Was the first person to send and recieve a radio signal. Some dont think he did it but most people do. Marconi was an Italian inventor.

  • Marconi

    Marconi
    Marconi opened the first radio factory in Chelmsford, England, and hired around 50 people.

  • Lee de Forest

    Lee de Forest
    Used the idea of the Audion Tube. It was used to amplify signals. Reginald Fessended originally came up with the idea.

  • Wireless Ship Act

    Wireless Ship Act
    The Wireless Ship Act requires all ships of the United States traveling over two-hundred miles off the coast and carrying over fifty passengers to have wireless radio equipment with a range of one-hundred miles.

  • Radio Stations

    Radio Stations
    Orignally 8XK and then renamed KDKA. Still broadcasts from Pittsburg, Pennsylvania.

  • WEAF

    WEAF
    Aired first 10 minute commercial. Total cost was 50 dollars. Thats 5 dollars a minute.

  • FRC

    FRC
    Organized FRC in 1927. Too many home stations broadcasting. It organized the licensing of transmitters.

  • FM Radio

    FM Radio
    FM radio was patented and Edwin Armstrong invented it. FM uses frequency modulation of the radio wave to minimize static and interference to make things more clear.