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Kabina 66 “Back Net”

Description of the radar set, tactical-technical characteristics
Kabina 66
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Figure 1: “Back Net”

frequency: F-band
pulse repetition time (PRT): 4 ms
pulse repetition frequency (PRF): 60 to 1460 Hz
pulsewidth (τ): 96 / 36 µs
receiving time: up to 3 ms
dead time: ca. 50 µs
peak power: up to 1.5 MW
average power: up to 32 kW
instrumented range: 250 NM
range resolution: 450 ft
beamwidth: 1.1 to 1.7 degrees
hits per scan: 1 - 8
antenna rotation: 5 rpm

Kabina 66 “Back Net”

Kabina 66 (Russian designator: 5N87; Cyrillic: 5Н87; NATO designator: “Back Net”) was an air defense radar system of the former Soviet Union

Interesting at this radar unit is the diametral attachment of 2 antenna systems. Every antenna is meant for another elevation angle. Since two equal radar units always turned a location synchronously, four height ranges were felt therefore (like a Stacked- Beam- Antenna).

The Kabina 66 was coupled with several height-finders (2 to 4 height-finders PRV-13 or PRV-17). The frequency is processed with four impulses but only two of these are transmitted. Two radar units work synchronizedly as a couple but also separate operation is possible. The rotary drive is hydraulicly carried out.
The power supply (300 kW / 400 Hz) is carried out of convertor or with diesel engines. A transfer needs 19 railroad plate freight cars.