SCR-584

SCR-584 Mobile Short Range Auto Tracking Radar Set - A Mobile Short Range Auto Tracking Radar set built by Westinghouse, General Electric and Chrysler during World War II. Initially developed by the MIT Radiation Laboratory as a gun laying radar using recently developed 2J32 magnetron tube as a microwave power source. The set operated on four frequencies between 2,700 and 2,800 MHz. SCR-584 Exterior View. SCR-584 at Peleliu, Antenna on Left is for the RC-184 IFF Set. Sketch of SCR-584 Auto Tracking Radar Installation. Two units in front of the guns are for the M-9 Director. Unit on the left is the M-7 Generator. The SCR-584 set had a search mode with a range of 40-50 miles and could switch to automatic tracking mode when the target reached within 18 miles. When in the tracking mode target data could be fed to position a nearby anti-aircraft gun battery. The set also presented azimuth and angular height to searchlight control station for directing searchlight as well as transmitting present azimuth, angular height, and altitude to M-4, M-7, or M-9 directors for gun-laying. The set was self-contained, built on a K-78 trailer and meant for forward area deployment. Its gross weight was 10 short tons. The overall length was 19.5 feet, width was 8 feet, height 10 feet, 4 inches. A towed trailer contained a generator power source. Thirteen men could install the set and obtain approximate data in 2 hrs. Accurate orientation and alignment took 4 additional hours. The SCR-584 was first used in combat at Anzio in February 1944, where it played a key role in breaking up German air attacks on the confined beachhead. Employed in England against the German V1 flying bombs it achieved remarkable success. SCR-584 Auto Tracking Radar SCR-584 Auto Tracking Radar Element Value Notes Nomenclature SCR-584 Variants Manufacturer Westinghouse (1,275) Chrysler (1,275) General Electric (1,275) Type Auto Tracking Radar Number Made 3,825 Original contract IEEE Band S Band Frequency 4 frequencies between 2,700 and 2,800 MHz PRF 1707 pps Pulse Width 0.8 us Rotation Speed 5 rpm Search mode RF Power 250 kW peak Range 39.7 mi Search 18.2 mi Auto track Short Range Range Error 25 yards Azimuth Error 1 mil (0.06 degree) Elevation Accuracy 1 mil (0.06 degree) IFF RC-184 AC Power 115 V, 60 Hz, 3 phase, 10 kVA maximum (without IFF) Some early units used 400hz power M7 Generator furnished Introduced May 1943 1st Production model SCR-584 Operator Console. M-7 Generator Set. See Also: US Radar Sets Sources: Thompson, Harris, Oakes & Terrett, The Signal Corps: the test (December 1941 to July 1943), Office of the Chief of Military History, Dept. of the Army, 1957 - World War, 1939-1945 - 621 pages, Pdf, pages 265-274. U.S. Navy - U.S. Radar Operational Characteristics of Radar Classified by Tactical Application FTP 217, page 50. Links: Radomes - Radar Equipment Wikipedia - SCR-584 Way Back Machine - SCR-584 Tribute Pages TM9-618 1943 M-7 Generator Set