SCR-584
| SCR-584 Technical Characteristics | |
| Wavelength | 10 cm |
|---|---|
| Frequency | (four bands around 3,000 MHz) |
| Magnetron | 2J32 |
| Peak Power Output | 250 kW |
| Pulse Width | 0.8 microsecond |
| Pulse Repetition Frequency | 1707 pulses per second |
| Antenna Diameter | 6 feet |
| Beam width to half power | 4 degrees |
| Maximum Range | |
| PPI Search | 70,000 yards (39.7 statute miles) |
| Auto-Track | 32,000 yards (18.2 statute miles) |
| Potentiometer Data (artillery control) | 28,000 yards (15.9 statute miles) |
| Minimum Range | 500 - 1000 yards |
| Lower Elevation Limit | -175 mils (-9.8 degrees) |
| Upper Elevation Limit | +1,580 mils (+88.9 degrees) |
| Azimuth Coverage | 360 degrees |
| Azimuthal scan rate in search mode | 5 revolutions per minute |
| Range Error | 25 yards |
| Azimuth Error | 1 mil (0.06 degree) |
| Elevation Accuracy. | 1 mil (0.06 degree) |
| Power Requirements | 115 V, 60 Hz, 3 phase, 10 kVA maximum (without IFF) |
| The SCR-584 is built into a K-78 trailer. Its gross weight is 10 short tons. The overall length is 19.5 feet, width is 8 feet, height 10 feet, 4 inches | |
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Data from U.S. War Department Technical Manuals TM11-1324 and TM11-1524 (published April 1946 by the United States Government Printing Office) |
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The SCR-584 (short for Signal Corps 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 radar of its era, and became one of the primary gun laying radars used worldwide well into the 1950s.
The system traces its history to a request from the British Army for a new gun-laying radar using the cavity magnetron, which had recently been introduced to the US during the Tizard Mission. Coordinating with their counterparts in Canada, they decided that the Canadians would develop a simple system for rapid deployment, while the Radiation Laboratory at MIT would be given an additional year to develop a much more advanced model. The radars were intended to be introduced in late 1942 and late 1943, respectively.
Various delays meant the SCR-584 did not reach field units until early 1944. They began replacing the earlier and much more complex SCR-268 as the US Army's primary anti-aircraft gun laying system as quickly as they could be produced. They proved dramatically easier to use in the field than the less advanced Canadian/British GL Mk. III radar, and many were rushed to England where they were an invaluable part of the defences developed to counter the V1 flying bomb. By the end of the war they had been used to track artillery shells in flight, detect vehicles, and dramatically reduce the manpower needed to guide anti-aircraft guns.
Data from U.S. War Department Technical Manuals TM11-1324 and TM11-1524 (published April 1946 by the United States Government Printing Office)
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