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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] |
SCR-189 Scout Car 2
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 rece ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Six Ton Tank M1917
The M1917 was the United States' first mass-produced tank, entering production shortly before the end of World War I.Zaloga (Armored Thunderbolt) p. 2 It was a license-built near-copy of the French Renault FT, and was intended to arm the American Expeditionary Forces in France, but American manufacturers failed to produce any in time to take part in the War. Of the 4,440 ordered, about 950 were eventually completed. They remained in service throughout the 1920s but did not take part in any combat, and were phased out during the 1930s. History The United States entered World War I on the side of the Entente Powers in April, 1917, without any tanks of its own. The following month, in the light of a report into British and French tank theories and operations, the American Expeditionary Forces' commander-in-chief, Gen. John Pershing, decided that both light and heavy tanks were essential for the conduct of the war and should be acquired as soon as possible. A joint Anglo-American ... [...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 caval ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 standardized on 10 June 1937, and used by Armored forces for command and control of tank units. It replaced the earlier SCR-189 and was used primarily in the early M2, M3 light tanks as well as the early M3 medium tanks. Their large size required them to be mounted in the tanks sponsons. It was replaced by the SCR-508 sets. Components * BC-223 Transmitter **Modes: AM, CW. **Frequency range: 4 crystal-controlled channels, 2.0 MHz to 4.5 MHz. **RF Power output: 10 Watts. **Range: CW 45 Miles. Voice 20 Miles. * BC-312 Receiver (See BC-342) * PE-55 Dynamotor (12Volt input) * MP14 or MP37 mast base and 15 foot whip antenna. Variants * SCR-210 Receiver only set See also * Signal Corps Radio * Crystal oscillator A crystal oscillat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 impo ... 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] |
US 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, clause 1 of the United States Constitution (1789). See alsTitle 10, Subtitle B, Chapter 301, Section 3001 The oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed 14 June 1775 to fight the American Revolutionary War (1775–1783)—before the United States was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.Library of CongressJournals of the Continental Congress, Volume 27/ref> The United States Army considers itself to be a continuation of the Continental Army, and thus considers its institutional inception to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Army
The United States Army (USA) is the land warfare, land military branch, service branch of the United States Armed Forces. It is one of the eight Uniformed services of the United States, U.S. uniformed services, and is designated as the Army of the United States in the United States Constitution, U.S. Constitution.Article II, section 2, clause 1 of the United States Constitution (1789). See alsTitle 10, Subtitle B, Chapter 301, Section 3001 The oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed 14 June 1775 to fight the American Revolutionary War (1775–1783)—before the United States was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.Library of CongressJournals of the Continental Congress, Volume 27/ref> The United States Army considers itself to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies of World War II, Allies and the Axis powers. World War II was a total war that directly involved more than 100 million Military personnel, personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Air warfare of World War II, Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the Atomic bombings of Hiroshima and Nagasaki, only two nuclear weapons ever used in war. World War II was by far the List of wars by death toll, deadliest conflict in hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superheterodyne
A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency. It was long believed to have been invented by US engineer Edwin Armstrong, but after some controversy the earliest patent for the invention is now credited to French radio engineer and radio manufacturer Lucien Lévy. Virtually all modern radio receivers use the superheterodyne principle; except those software-defined radios using ''direct sampling''. History Heterodyne Early Morse code radio broadcasts were produced using an alternator connected to a spark gap. The output signal was at a carrier frequency defined by the physical construction of the gap, modulated by the alternating current signal from the alternator. Since the output frequency of the alternator was generally in the audible range, this produces an audible a ... [...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] |
