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Solar-powered Amateur Radio Station in tents. Note the portable VHF/UHF satellite and HF antennas in the background Rugged HF transceiver for voice communications. 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.
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 radioelectric ...
A 2021 analysis of over 700 million communications logged by the Club Log blog, [18] and a similar review of data logged by the American Radio Relay League, [19] both show that wireless telegraphy is the 2nd most popular mode of amateur radio communication, accounting for nearly 20% of contacts.
CQ Amateur Radio United States: English Monthly 1945–2023 National Communications Magazine United States: English Bimonthly 1988-present CQ VHF Magazine United States: English Quarterly 1996–2013 Electronics Illustrated United States: English Monthly 1959–1961 ham radio United States: English Monthly 1968–1990 K9YA Telegraph United States
Morse code is called the original digital mode. Radio telegraphy, designed for machine-to-machine communication is the direct on / off keying of a continuous wave carrier by Morse code symbols, often called amplitude-shift keying or ASK, may be considered to be an amplitude modulated mode of communications, and is rightfully considered the first digital data mode.
The S stands for "Strength". Strength is an assessment of how powerful the received signal is at the receiving location. Although an accurate signal strength meter can determine a quantitative value for signal strength, in practice this portion of the RST code is a qualitative assessment, often made based on the S meter of the radio receiver at the location of signal reception.
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This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Transmission of information For other uses, see Communication (disambiguation). "Communicate" redirects here. For other uses, see Communicate (disambiguation). There are many forms of communication, including human linguistic communication using sounds, sign language, and writing as well ...