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An amateur operator's call sign is composed of a prefix, a separating numeral and a suffix. The prefix can be composed of letters or numbers, the separating numeral is between 0 and 9, and a suffix is from one to four characters, usually letters. [ 5 ] Examples of call signs and their constituent parts are as follows:
Call signs are allocated to ham radio stations in Barbados, Canada, Mexico and the United States. Many countries have specific conventions for classifying call signs by transmitter characteristics and location. The call sign format for radio and television call signs follows a number of conventions.
Call signs in the United States. Call signs in the United States are identifiers assigned to radio and television stations, which are issued by the Federal Communications Commission (FCC) and, in the case of most government stations, the National Telecommunications and Information Administration (NTIA). They consist of from 3 to 9 letters and ...
The International Telecommunication Union (ITU) allocates call sign prefixes for radio and television stations of all types. [1] They also form the basis for, but may not exactly match, aircraft registration identifiers. These prefixes are agreed upon internationally, and are a form of country code. A call sign can be any number of letters and ...
Special event call signs are issued with a 'GB' prefix, but others like GQ, GO, GR, MQ, GA, MO, and 2O have been issued in special cases. Ofcom also allows numerals in special event call sign suffixes. For instance GB75RD was a special event sign for the 75th anniversary of the Reading and District Amateur radio club. [13]
At the conference, standard international amateur radio bands of 80/75, 40, 20 and 10 meters and radio callsign prefixes were established by treaty. In 1933 Robert Moore, W6DEI, begins single-sideband voice experiments on 75 meter lower sideband. By 1934, there were several ham stations on the air using single-sideband. [15]
Amateur radio in Australia has its own set of call signs, managed by the Australian Maritime College, normally starting with the prefix VK, the state identifier, and then 1,2,3, or 4 letters. As of July 29, 2020 - the following AR callsign structure is in place in Australia: [ 7 ] [ 8 ]
Conventional radio and television broadcasting stations assignments are generally three, four or five letters long (not including the "–FM", "–TV", or "–DT" suffix) and almost exclusively use "C" call signs; with a few exceptions noted below, the "V" calls are restricted to specialized uses such as amateur radio. Call sign prefixes are ...