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R-S-T system. For other uses, see RST (disambiguation). S-Meter (ICOM IC-732 HF Transceiver) The R-S-T system is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an ...
Amateur First Grade required an essay-type examination and five (later ten) words per minute code examination before a Radio Inspector at one of the Department's field offices. This class of license was renamed Amateur Class in 1927 and then Amateur First Class in 1932. Amateur Radio licensing in the United States began in mid-December 1912.
Amateur radio users in the U.S. and Canada have used the R-S-T system since 1934. This system was developed by amateur radio operator Arthur W. Braaten, W2BSR. It reports the readability on a scale of 1 to 5, the signal strength on a scale of 1 to 9, and the tone of the Morse code continuous wave signal on a scale of 1 to 9.
An amateur radio Morse code conversation example. To make Morse code communications faster and more efficient, there are many internationally agreed patterns or conventions of communication which include: extensive use of abbreviations, use of brevity codes such as 92 Code, RST code, Q code, Z code as well as the use of Morse prosigns. The ...
Procedure words (abbreviated to prowords) are words or phrases limited to radio telephone procedure used to facilitate communication by conveying information in a condensed standard verbal format. Prowords are voice versions of the much older procedural signs for Morse code which were first developed in the 1860s for Morse telegraphy , and ...
Letter code words with pronunciation Symbol Code word DIN 5009 (2022) IPA ICAO (1950) IPA English respelling A Alfa ˈalfa: ˈælfa: AL fah B Bravo: ˈbravo: ˈbraːˈvo BRAH voh C Charlie: ˈtʃali (or ˈʃali) ˈtʃɑːli (or ˈʃɑːli) CHAR lee (or SHAR lee) D Delta: ˈdɛlta: ˈdeltɑ: DELL tah E Echo: ˈɛko: ˈeko: ECK oh F Foxtrot ...
The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio.
In amateur radio use, a CQ call can be qualified by appending more letters, as in CQ DX (meaning "calling all stations located on a different continent from the caller"), or the ITU call sign prefix for a particular country (e.g. CQ VK for "calling Australia" or CQ JA for "calling Japan").
Brevity codes are used in amateur radio, maritime, aviation and military communications. They are designed to convey complex information with a few words or codes. Some are classified from the public. List. ACP-131 Allied military brevity codes; ARRL Numbered Radiogram
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 ...