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SCR-193
{{More footnotes, date=April 2017 The SCR-193 was a series of Signal Corps Radio sets used by the U.S. armed forces in World War II. The SCR-193-A, SCR-193-B, SCR-193-C, SCR-193-D and SCR-193-E radio sets were designed for installation in American military vehicles for the purpose of providing intervehicular communication whether the vehicles are stationary or moving. They were designed for use in M2A3 light tank, M1 scout car, M1A1 combat car, M3A1 scout car, and 1/4 ton command truck, respectively. See also * Radio Tractor * Signal Corps Radio * SCR-189 * 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 imp ... References * US War Department. TM 11-273 Radio Sets: SCR-193-A, SCR-193-B, SCR-193-C, SCR-193-D, SCR-183-E.'' Dated 12 April 1941. Retrieved 6 April 2017. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Corps Radio
Signal Corps Radios were U.S. Army 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. 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 "handie t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 the original radio components are unknown, so what or how many tanks were fitted with the SCR-189 also appears to be unknown. Use An early tactical vehicle radio, it was the first Army set to utilize the Superheterodyne receiver. As the M1917 tank was phased out, the new M1 Combat Car and M2 Light Tank were equipped with SCR-189's. The SCR-189 was replaced by the SCR-245 in 1937. Components * BC-175 Receiver * BC-176 Transmitter CW/voice, 2.200 kHz, to 2.600 kHz at 7.5 Watt, range 8 Miles * BC-177 Control box * BC-206 Control box * PE-48 Power supply * Battery box BX-3 (Battery BA-27) Variants * SCR-190 Receiver only set See also * Radio Tractor * Signal Corps Radio * SCR-193 * Crystal radio A crystal radio receiver, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M1 Combat Car
The M1 Combat Car, officially Light Tank, M1, was a light tank used by the U.S. Cavalry in the late 1930s and developed at the same time as the infantry's very similar M2 light tank. After the Spanish Civil War, most armies, (including the U.S. Army), realized that they needed tanks armed with cannons, not merely vehicles armed with machine guns, and so the M1 became obsolete. History and development The National Defense Act of 1920 set tanks as the responsibility of the infantry and the general staff defined the purpose of tanks as the support of infantry units. Light tanks were defined as weighing five tons or less – so they could be carried by trucks – and medium tanks no greater than 15 tons to meet bridge weight limits. With very tight restrictions on spending, tank development in the U.S. was limited to a couple of test vehicles a year. The mechanization of the army was promoted by General Douglas MacArthur (Chief of Staff of the US Army) who believed that the cavalry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M3 Scout Car
The M3 Scout Car (known as the White Scout Car in British Commonwealth service) was an American-produced armored car. The original M3 Scout Car was produced in limited numbers, while the improved M3A1 Scout Car saw wide service during World War II and after. Design The main production variant, the M3A1 Scout Car, was a lightly armored, open topped, machine gun armed, four wheel drive vehicle designed to be used in the reconnaissance role. The M3A1 Scout Car was crewed by a driver and commander, while there was seating for six additional occupants in the rear. Powered by a Hercules JXD 6-cylinder in-line petrol engine delivering , the M3A1 Scout Car had a maximum road speed of and the fuel tank gave a maximum range of . The vehicle’s four wheel drive and bumper mounted unditching roller enabled it to cross a wide trench and climb a high step, maximum fording depth was . The armored body of the M3A1 Scout Car was produced by the Diebold Lock and Safe Company, it had a max ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Tractor
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. 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 Megahertz Variants 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 * Sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 important component, a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode. Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of wire, a capacitor, a crystal detector, and earphones (because a crystal set has insufficient power for a loudspeaker). However they are passive receivers, while other radios use an amplifier powered by current from a battery or wall outlet to make the radio signal louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can receive stations only within a limited range of the transmitter. The rectifying prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
