Radio History

By estebanxtorres

  • Heinrich Hertz

    detects and produces radio waves.

  • Marchese Guglielmo Marconi

    builds his first radio equipment, a device that will ring a bell from 30 ft. away.

  • Marconi

    establishes first radio link between England and France.

  • American scientist R.A. Fessenden

    transmists human speech via radiowaves.

  • Marconi

    transmits telegraphic radio messages from Cornwall to Newfoundland

  • Valdemar Poulsen

    patents an arc transmission that generates continuous radio waves, producing a frequency of 100 kHz and receivable over 150 miles.

  • Marconi

    invents the directional radio antennae.

  • Fessenden

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

  • GE

    develops a 100 kHz, 2 kW alternator for radio communication.

  • In the US

    FM radio stations begin to use the RDS already in place in Europe.