Radio Teletype (RTTY) became a popular digital mode in amateur radio through a mix of postwar circumstances, technical curiosity, and a group of operators who looked at a 180-pound machine and thought, “This would look cool in my radio room.” Its growth reflects both the experimental spirit of ham radio and the fact that, sometimes, if it makes noise, prints letters, and connects to a transmitter, hams will find a way to make it communicate with the world.

History of RTTY,…

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