Signal Corps Radios were

U.S. Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cl ...

military communications components that comprised "sets". Under the Army Nomenclature System, the abbreviation SCR initially designated "Set, Complete Radio", but was later misinterpreted as "Signal Corps Radio."

Nomenclature

The term SCR was part of a nomenclature system developed for the U.S. Signal Corps, used at least as far back as

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. Three-letter designators beginning with "SC" were used to denote complete systems, while one and two-letter designators (such as "BC", for basic component, "FT" for mounting, etc.) were used for components. Only a few system designators were used: :::SCM Set, Complete, Meteorological :::SCR Set, Complete, Radio :::SCS Set, Complete, System

SCR radio sets

The U.S. Signal Corps used the term "sets" to denote specific groupings of individual components such as transmitters, receivers, power supplies, handsets, cases, and antennas. SCR radio sets ranged from the relatively small

SCR-536 The SCR-536 was a hand-held radio transceiver used by the US Army Signal Corps in World War II. It is popularly referred to as a walkie talkie, although it was originally designated a "handie talkie". History The SCR-536 is often considered th ...

"handie talkie" to high-powered, truck-mounted mobile communications systems like the

SCR-299 The SCR-299 was a U.S. Signal Corps mobile military communications unit used during World War II. History The SCR-299 "mobile communications unit" was developed to provide long-range communications during World War II. The US Military sought im ...

and large microwave radar systems such as the

SCR-584 radar The SCR-584 (short for '' Set, Complete, Radio # 584'') was an automatic-tracking microwave radar developed by the MIT Radiation Laboratory during World War II. It was one of the most advanced ground-based radars of its era, and became one of th ...

SCS

The SCS designator was applied to groups of SCR-numbered sets comprising an extensive system, such as multiple radio sets employed in a ground-based fighter direction/control center. The SCR designator could be a single transmitting or receiving set, or a full set of both transmitting and receiving equipment.

Additional designators

An additional designator, "RC" was used for subsystems or groups of accessories. The

Joint Electronics Type Designation System The Joint Electronics Type Designation System (JETDS), which was previously known as the Joint Army-Navy Nomenclature System (AN System. JAN) and the Joint Communications-Electronics Nomenclature System, is a method developed by the U.S. War Depa ...

which came into use in 1943 absorbed or superseded the SC designations.

SCR communication radios by branch use

This is only a general list, quite a few radios crossed over between branches. Armor * SCR-78 *

SCR-189 The SCR-189 was a mobile Signal Corps Radio tested by the United States Army before World War II. It was designed for armored forces, and mounted in the Six Ton Tank M1917. The original production run of these tanks included 50 "radio tanks" but t ...

SCR-245 The SCR-245 Radio was a mobile MF/ HF Signal Corps Radio used by the U.S. Army before and during World War II, for short range ground communications, It was one of the first crystal controlled sets used by the Army. Use The SCR-245 was standard ...

* SCR-508 FM * SCR-510 FM Artillery * SCR-109 * SCR-136 * SCR-161 * SCR-178 * SCR-179 pack * SCR-194 * SCR-608 FM * SCR-610 FM * SCR-619 FM Infantry * SCR-77 * SCR-131 * SCR-195 *

SCR-284 The SCR-284 was a World War II era combination transmitter and receiver used in vehicles or fixed ground stations. History The Crosley Corporation of Cincinnati, Ohio manufactured the Signal Corps Radio set SCR-284 that consisted of the BC-6 ...

SCR-300 The SCR-300 was a portable radio transceiver used by US Signal Corps in World War II. This backpack-mounted unit was the first radio to be nicknamed a "walkie talkie". History In 1940, Motorola (then the Galvin Manufacturing Company) received a ...

FM *

* SCR-694 general use/command * SCR-50 * SCR-97 * SCR-101 * SCR-105 * SCR-124 * SCR-171 * SCR-177 * SCR-193 *

* SCR-506 Cavalry * SCR-44 mule pack * SCR-49 mule pack * SCR-127 mule pack * SCR-130 mule pack * SCR-179 mule pack * SCR-203 mule pack * SCR-511 pogo stick Coast artillery/AAA * SCR-162 * SCR-543 Air Liaison (ground) * SCR-54 *

SCR-108 The SCR-108 Radio Truck was a Signal Corps Radio vehicle used by the United States Army during and after World War I for short range air-to-ground communications, Use This truck was assigned to squadron headquarters in order to communicate with t ...

* SCR-188 * SCR-197 * SCR-237 * Aircraft * SCR-62 observation balloon * SCR-64 *

SCR-68 The SCR-68 ( SCR was a military term meaning Set, Complete, Radio) was a military radiotelephone used by the US Army Signal Corps as an aircraft radio in the waning months of World War I.Stoller, H. M Engineering Dept, Western Electric Company, Inc. ...

* SCR-80 * SCR-90 * SCR-91 * SCR-100 * SCR-133 * SCR-134 * SCR-135 * SCR-183 * SCR-187 * SCR-274 * SCR-283 * SCR-287 * SCR-522 * SCR-542

Radar

* SCR-268 searchlight and gun control *

SCR-270 The SCR-270 (Set Complete Radio model 270) was one of the first operational early-warning radars. It was the U.S. Army's primary long-distance radar throughout World War II and was deployed around the world. It is also known as the Pearl Harbor ...

mobile long range early warning, VHF * SCR-271 fixed long range early warning, VHF *

SCR-277 The SCR-277 was a mobile, trailer mounted radio range set for radio guidance of aircraft. It was standardized by the U.S. Army in June 1941. Specifications The SCR-277 was used as a navigation aid. It included the BC-467 transmitter with an RF ...

Radio range * SCR-289 improved -270 *

SCR-527 The SCR-527 (''Signal Corps Radio'' model 527) was a medium-range radar used by the United States for early warning and ground-controlled interception (GCI) during World War II World War II or the Second World War, often abbreviat ...

medium range, VHF *

SCR-584 The SCR-584 (short for '' Set, Complete, Radio # 584'') was an automatic-tracking microwave radar developed by the MIT Radiation Laboratory during World War II. It was one of the most advanced ground-based radars of its era, and became one of the ...

gun control, microwave * SCR-602 mobile, short range early warning * SCR-658 weather balloon tracker * SCR-784 light weight 584

References

External links

* http://sdr.lib.umich.edu/cgi/pt?id=mdp.39015062770162 signal corps storage catalogue 1920 * https://earlyradiohistory.us/1916sc.htm early systems * http://www.qsl.net/pe1ngz/army/army-us/us-comm.html {{commonscat Military radio systems of the United States World War II American electronics Military technology History of radio Radio electronics