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P-12 MA ("Spoon Rest A") radar in 1983.
Viewers of the historical Soviet radar device P-12 NP ("Spoon Rest B").

Under the designation P-12 ( Russian П-12 ) was a Soviet radar set that worked with extremely low transmission frequencies (VHF band). The NATO code was "Spoon Rest".

Several modifications of this radar device were made:

  • P-12 MA : oldest version on truck type ZIL-157 (NATO code: "Spoon Rest A")
  • P-12 NP : Hanger version in two hangers type 700G (NATO code: "Spoon Rest B")
  • P-12 NA : latest version on truck of the manufacturer Uralsky Avtomobilny Zavod (NATO code: "Spoon Rest C")

The main differences between these stations were the various options for coupling them to other radar devices, automated command and control objects, or weapon systems. The main area of ​​application of the truck versions was the anti-aircraft missile complex S-75 "Volkhov"

Radar device

Technical data P-12
Frequency range   150-170 MHz
Pulse repetition time   2.77 ms
Pulse repetition frequency   360 Hz
Transmission time (PW)   6 µs
Reception time   2.4 ms
Dead time   377 µs
Pulse power   160-250 kW
Average performance   up to 540 W
displayed distance   up to 360 km
Distance resolution   900 m
Opening angle   8 °
Hit count   over 15
Antenna round trip time   ≥ 6 s (continuously adjustable)

The blocks of a very effective interference protection system can be seen above the panoramic device. A very stable coherent oscillator working in a thermostat and two potential storage tubes were the core of this system. It was able to suppress fixed targets and non-synchronous impulse interference at the same time and was equipped with wind compensation (MTI) against chaff (radar deception) .

Web links

Commons : P-12  - collection of pictures, videos and audio files