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SR

Description of the radar set, tactical-technical characteristics

Figure 1: SR antenna, the top row with the vertical dipoles is intended for the IFF.

Figure 1: SR antenna, the top row with the vertical dipoles is intended for the IFF.

Specifications
frequency: 175 … 225 MHz
(VHF-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 60 or 200 Hz
pulsewidth (τ): 1; 4 or 20 µs
receive time:
dead time:
peak power: 300 kW
average power:
instrumented range: 200 mi (≙ 320 km)
range resolution: 150 m
accuracy: ±90 m; ±2°
beamwidth: 20°
hits per scan:
antenna rotation: 1¼ or 7 min-1
MTBCF:
MTTR:

SR

The SR (Search Radar) was an operating in VHF-Band long range search radar, primarily designed for aircraft detection, for installation on destroyers and larger vessels. The mission focused on the Pacific theater of war.

The antenna was a so called “bedspring antenna”, 5.5 ft height and 13.5 ft wide, fed by a linear dipole array.

The targets were diplayed on a 5-inch A-scope (see Figure 2) and a 7-inch PPI-scope.

This radar was developed in the early 40s.

Picture gallery of SR

Figure 2: IFF control panel and A-scope of the Search Radar