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The Radio tractor was a mobile Signal Corps Radio used by the U.S. Army for ground communications before and during World War I. Prior to World War I, trucks were referred to as "tractors", and there were also telegraph tractors, and telephone tractors.
At least 3 variants are known:
* Radio Tractor No. 1
* Radio Tractor No. 2 ( Four Wheel Drive)( Jeffery Quad), Unknown radio set
* Radio Tractor No. 3 ( White Motor Company), SCR-50 radio set
The No.3 truck was also accompanied by a tender "Maintenance truck No. 5" later renumbered as K-5.
* Annual Report 191
page 249 * 1918 Military Signal Corps manua
* New York Times 191
* Electrical world vol. 6
* The Wireless Ag
* Automobile journal Vol. 3
* https://web.archive.org/web/20121012130248/http://www.nsa.gov/public_info/_files/cryptologic_spectrum/umbrellas.pdf
Use
Very little information exists for these trucks, as most of the components were built before standardization. They first made their debut on the Mexican border in a radio intercept role, and later during World War I, some sets may have been reconfigured for RDF and other uses.Components
* SCR-50, 2 kilowatt spark transmitter, crystal or vacuum tube detector receiver, 0.15-0.50 MegahertzVariants
At least 3 variants are known:
* Radio Tractor No. 1
* Radio Tractor No. 2 ( Four Wheel Drive)( Jeffery Quad), Unknown radio set
* Radio Tractor No. 3 ( White Motor Company), SCR-50 radio set
The No.3 truck was also accompanied by a tender "Maintenance truck No. 5" later renumbered as K-5.
See also
{{Portal, World War I * Signal Corps Radio * SCR-108 *Crystal radio
A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio. It uses only the power of the received radio signal to produce sound, needing no external power. It is named for its most impo ...
* List of U.S. Signal Corps vehicles
References
* Signal Corps Storage Catalo* Annual Report 191
page 249 * 1918 Military Signal Corps manua
* New York Times 191
* Electrical world vol. 6
* The Wireless Ag
* Automobile journal Vol. 3
* https://web.archive.org/web/20121012130248/http://www.nsa.gov/public_info/_files/cryptologic_spectrum/umbrellas.pdf
External links
* https://web.archive.org/web/20100413132056/http://www.gordon.army.mil/ocos/museum/equipment.asp scr and bc lists Amateur radio transmitters Military radio systems of the United States World War I American electronics Military electronics of the United States Radio during World War I