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Today, amateur radio operators still use codes 73 and 88 regularly, and -30-is used in journalism, as it was shorthand for "No more - the end". The Young Ladies Radio League uses code 33 to mean "love sealed with friendship and mutual respect between one YL [young lady] and another YL" [3] or simply "hugs." A once-used but unofficial code 99 ...
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]
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.
Most countries do not have a minimum age requirement in order to earn an amateur radio license and become an amateur radio operator. Although the number of amateur radio operators in many countries increases from year to year, [citation needed] the average age of amateur radio operators is relatively high. In some countries, the average age is ...
He is considered the Patron saint of Amateur radio operators. [17] Two radios in the ARC-5 series. Unit on the left is a BC-453-B, covering 190-550 kHz; the one on the right is a BC-454-E, covering 3-6 MHz. Both have been modified for Amateur Radio use by replacing the front connector with a small control panel.
Adjacent frequencies are often used by illegal operators using modified CB or amateur radio equipment. Operators sometimes refer to this activity as freebanding. The Industrial/Business Radio Pool of the Private Land Mobile Radio Services has several channels just above the Citizen's Band, at 27.430, 27.450, 27.470, 27.490, 27.510, and 27.530 MHz.
Channels 58 and 59 are often offset in frequency to limit interference to the weak-signal and amateur radio satellite sub-bands (431–433 & 435–438 MHz respectively). Many modern CATV receivers can still lock-on to frequencies offset as much as 1 MHz. Rarely used today due to heavy FM repeater use in this range.
However it is still used by amateur radio operators, and military services require signalmen to be trained in Morse code for emergency communication. [15] [16] A CW coastal station, KSM, still exists in California, run primarily as a museum by volunteers, [17] and occasional contacts with ships are made.