radio history

By kanggwalla
  • first radio waves

    first radio waves

    Heinrich Hertz detects and produces radio waves.
  • first radio equipment is built

    first radio equipment is built

    Marchese Guglielmo Marconi builds his first radio equipment, a device that will ring a bell from 30 ft. away.
  • first human speech via radio

    first human speech via radio

    American scientist R.A. Fessenden transmists human speech via radiowaves.
  • marconi sends radio message

    marconi sends radio message

    Marconi transmits telegraphic radio messages from Cornwall to Newfoundland
  • Fessenden invents first electric radio

    Fessenden invents first electric radio

    Fessenden invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz.
  • radio gains publicity

    radio gains publicity

    Radio communications gain publicity when the captain of the Montrose alerts Scotland via radio of an escaping criminal.
  • new radio introduced

    new radio introduced

    The cascade-tuning radio receiver and the heterodyne receiver are introduced.
  • Edwin Armstrong patents a radio receiver

    Edwin Armstrong patents a radio receiver

    Fessendenpatents a radio receiver circuit with positive feedback. Part of the amplified high-frequency signal is fed back to the tuning circuit to enhance selectivity and sensitivity.
  • first regular licensed radio

    first regular licensed radio

    KDKA broadcasts the first regular licensed radio broadcast out of Pittsburgh, PA.
  • RCA starts operating Radio Central on Long Island

    RCA starts operating Radio Central on Long Island

    RCA starts operating Radio Central on Long Island.
    The American Radio League establishes contact via a shortwave radio with Paul Godley in Scotland, proving that shortwave radio can be used for long distance communication.
  • University of Michigan gets broadcasting rights

    University of Michigan gets broadcasting rights

    March: WWJ, an AM station in Detroit, offers the University of Michigan broadcasting rights for extension lectures.
  • dreese submits a proposal for um operated station

    dreese submits a proposal for um operated station

    um professor Dreese submits a proposal for several UM operated stations. His proposal was tabled by the Regents, who were not concerned with radio at the time.