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The SCR-536 is often considered the first of modern hand-held, self-contained, "handie talkie" transceivers (two-way radios). It was developed in 1940 by a team led by Don Mitchell, chief engineer for Galvin Manufacturing (now Motorola Solutions) and was the first true hand-held unit to see widespread use. [1]
The SCR-300, designated AN/VRC-3 under the Joint Electronics Type Designation System, was a portable frequency modulated (FM) 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 ".
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.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.
A US Army signaller (25Q) erecting a 30-meter mast antenna Royal Navy signaller with signal flags, 1940. A signaller, signalman, colloquially referred to as a radioman or signaleer [1] in the armed forces is a specialist soldier, sailor or airman responsible for military communications.
The AARS organization continued to operate until the United States entry into World War II on 7 December 1941, at which time radio amateurs were denied the use of the airwaves, and the amateur service and the Army Amateur Radio System were deactivated. Following WWII, the US Army recognized the importance of reactivating the AARS to train ...
The SCR-508 radio was a mobile Signal Corps Radio used by the U.S. Army during World War II, for short range ground communications.The SCR-508 series radio represented the Army's commitment to both FM and crystal tuning, and was used extensively by armor and mechanized units.
BC-342 radio receiver. The BC-342 was a World War II U.S. Army Signal Corps high frequency radio receiver.It was used primarily as part of field installations such as the SCR-188A, but could be used with mobile sets such as the 2 1/2 ton mounted SCR-399.
War correspondents and press reporters frequently made use of the SCR-299 and SCR-399. Access to the sets was provided to them by US Second Army and US Third Army Group Communications Teams, and in one instance, the SCR-399 became the only means of getting press copy direct to London. [6]