Slow-scan television
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Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color.
Astronaut Gordon Cooper, SSTV transmission from Faith 7
NASA slow-scan image from the Moon
Slow-scan test card
Encoded image in B/W 8 system.
Shortwave radio
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Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW). There is no official definition of the band range, but it always includes all of the high frequency band (HF), which extends from 3 to 30 MHz ; above the medium frequency band (MF), to the bottom of the VHF band.
Grundig Satellit 400 solid-state, digital shortwave receiver, c. 1986
Radio amateurs carried out the first shortwave transmissions over a long distance before those of Guglielmo Marconi.
National Panasonic R3000 analog shortwave radio receiver, c. 1965.
Portable shortwave receiver's digital display tuned to the 75–meter band