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Radiofax
Sign in to saveAlso known as HF fax
Radiofacsimile, radiofax or HF fax is an analogue mode for transmitting grayscale images via high frequency (HF) radio waves. It was the predecessor to slow-scan television (SSTV). It was the primary method of sending photographs from remote sites (especially islands) from the 1930s to the early 1970s. It is still in limited use for transmitting weather charts and information to ships at sea.
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Within Vinony's link graph, Radiofax is referenced by 38 other articles, and connects out to weather map, National Hurricane Center and high frequency.
Vinony files it under Fax, Navigational aids and Radio electronics.
Its subject is documented across 9 Wikipedia language editions.
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Encyclopedic overview
10 sectionsContents
- History
- Weatherfax
- Newspaper fax
- Transmission details
- Automatic Picture Transmission format (APT)
- Stations
- History
- See also
- References
- External links
Radiofacsimile, radiofax or HF fax is an analogue mode for transmitting grayscale images via high frequency (HF) radio waves. It was the predecessor to slow-scan television (SSTV). It was the primary method of sending photographs from remote sites (especially islands) from the 1930s to the early 1970s. It is still in limited use for transmitting weather charts and information to ships at sea.
==History== thumb|right|Children read a wirelessly-transmitted newspaper in 1938.thumb|December 1945 advertisement for New York City FM station WGHF, featuring the station's experimental broadcast facsimile service using a subcarrier transmission Richard H. Ranger, an electrical engineer working at Radio Corporation of America (RCA), invented a method for sending photographs through radio transmissions. He called his system the wireless photoradiogram, in contrast to the fifty-year-old telefacsimile devices which used first telegraphic wires, and then later was adapted to use the newer telephone wires.
Excerpted from Wikipedia’s “Radiofax” article, available under the CC BY-SA 4.0 licence.