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  2. Amateur radio emergency communications - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_emergency...

    Amateur radio emergency communications. Solar-powered Amateur Radio Station in tents. Note the portable VHF / UHF satellite and HF antennas in the background. In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.

  3. Amateur Radio Emergency Service - Wikipedia

    en.wikipedia.org/wiki/Amateur_Radio_Emergency...

    Amateur Radio Emergency Service. In the United States and Canada, the Amateur Radio Emergency Service ( ARES) is a corps of trained amateur radio operator volunteers organized to assist in public service and emergency communications. It is organized and sponsored by the American Radio Relay League and the Radio Amateurs of Canada .

  4. Radio Emergency Associated Communication Teams - Wikipedia

    en.wikipedia.org/wiki/Radio_Emergency_Associated...

    REACT ( Radio Emergency Associated Communication Teams) is a CB radio Emergency Channel 9 monitoring organizations across the United States, Canada and worldwide, established in 1962. The primary role of REACT volunteers was to stand and watch on CB Emergency Channel 9 to help motorists. Later, duties grew to include radio communications after ...

  5. Amateur radio homebrew - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_homebrew

    Amateur radio. Homebrew is an amateur radio slang term for home-built, noncommercial radio equipment. [1] Design and construction of equipment from first principles is valued by amateur radio hobbyists, known as "hams", for educational value, and to allow experimentation and development of techniques or levels of performance not readily ...

  6. Radio Amateur Civil Emergency Service - Wikipedia

    en.wikipedia.org/wiki/Radio_Amateur_Civil...

    The concept of a standby "Radio Amateur Civil Emergency Service" to replace the conventional "Amateur Radio Service" during wartime was developed in 1952 as result of input from the American Radio Relay League and the Department of the Army's Office of Civil Defense. During World War II, the Amateur Radio Service had been silenced and a new War ...

  7. Crystal radio - Wikipedia

    en.wikipedia.org/wiki/Crystal_radio

    Type 'C' Form 'A' twin detector crystal radio set, manufactured by British Thomson Houston Ltd. in 1924, kept at the Museum of the radio - Monteceneri (Switzerland) Early radio telegraphy used spark gap and arc transmitters as well as high-frequency alternators running at radio frequencies. The coherer was the first means of detecting a radio ...

  8. Amateur radio - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio

    Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. [ 1] The term "amateur" is used to specify "a duly authorized person interested in ...

  9. Salvation Army Team Emergency Radio Network - Wikipedia

    en.wikipedia.org/wiki/Salvation_Army_Team...

    The Salvation Army Team Emergency Radio Network ( SATERN) is a network of volunteer amateur radio operators based in North America. It works to provide emergency communications between Salvation Army posts during times of disaster, and to pass messages with health and welfare information between the Salvation Army and the general public.

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