Amateur radio
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Amateur radio, also known as Ham radio, is the use of specific bands and frequencies within the radio spectrum for non-commercial communication, technical experimentation, self-training, recreation, r
Amateur radio station with transceivers, amplifiers, and a computer for digital modes. On the wall are awards, certificates, and QSL cards from foreign stations
Polish amateur radio station SP1QE with a 1930s vacuum tube transmitter and receiver
An amateur radio station in Wales. Multiple transceivers are employed for different bands and modes. Computers are used for control, data modes, SDR, RTTY and logging.
Amateur operator with antennas in Åland
Radioteletype
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Radioteletype is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link. Radioteletype evolv
Tuning indicator on cathode ray tube
Punched tape of the type used with teleprinters in a Creed model 6S/2 5-hole paper tape reader
Electronic RTTY terminal, c. 1980