Radio

By kaygerry

  • electromagnetic waves

    Heinrich Hertz proved that electricity can be transmitted in electromagnetic waves. He conducted experiments in sending and receiving these waves.

  • Radios on ships

    Radios began to appear on ships at sea. This reduced the isolation of the ships, improving both reliability and safety.
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    First demonstration of radio

    Nikola Tesla wirelessly transmitted electromagnetic energy. He made the first public demonstration of radio in St. Louis.
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    wireless telegraph

    Guglielmo Marconi filed for patent protection of his radio apparatus. He established the wireless telegraph and signal company.

  • wireless apparatus

    The R.F. Matthews was the first ship to request emergency assistance using a wireless apparatus which is a wireless transmitter or receiver.

  • first transatlantic signal

    The first transatlantic signal was sent from Ireland to Canada.

  • amateur radio

    Amateur radio was introduced to the U.S. Scientific American article on How to Construct an Efficient Wireless Telegraphy Apparatus at Small Cost.

  • The amplification of radio signals

    Reginald Fessenden is the 1st to transmit a program of speech and music. Lee Deforest produces the Audio a triode vacuum tube that allowed for amplification of radio signals.