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shortwave radio

a radio that transmits or receives shortwaves. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for shortwave radio
  • And he has promised, via shortwave radio, to show me what oil is doing to his people.
  • Instead, he constructed an early version of a shortwave radio transmitting station.
  • Some foreign shortwave radio broadcasts were available.
Encyclopedia Article for shortwave radio

transmission and reception of information by means of electromagnetic waves about 10 to 80 m (33 to 262 feet) in length having frequencies of approximately 29.7 to 3.5 megahertz. During the early 1920s attempts were made to transmit radio signals over long distances by bouncing them off the layers of charged particles in the Earth's ionosphere. The success of these experiments prompted the establishment of worldwide shortwave communication by the late 1930s.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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