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Description of the radar set, tactical-technical characteristics
P-12 Sichtgeräte Goniometer

Figure 1: Scopes of the “Spoon Rest B”

frequency: 150 - 170 MHz
(lower VHF-band)
pulse repetition time (PRT): 2.77 milliseconds
pulse repetition frequency (PRF): 345 Hz ±10%
pulsewidth (τ): 6 µs
receiving time: 2.4 milliseconds
dead time: 377 µs
peak power: 160 to 250 kW
average power: up to 540 watts
instrumented range: 200 NM
range resolution: ½ NM
hits per scan: > 15
antenna rotation: 6 … 30 seconds
(0 … 10 rpm.)


The P-12 (Russian designation: 1RL14, NATO designation: „Spoon Rest B“) is a rapidly deployable radar family in the VHF range. The basic version was included in the armament of the Soviet Army since 1958.

The different versions are:

The station could be synchronized with another radar using a coupling apparatus and display the echoes of both radars. The rotation of the P-12 was synchronized to the other radar via a multi-channel servo system. The transmitter then used the extraneous trigger pulse. The echo signals were fed directly into a second video channel in the display unit.

The P-12 had an effective jamming protection system with two potential storage tubes. The interference protection system could be configured differently in near range than in far range. The switching was done with a strobe-pulse, which was generated by a phantastron and could be controlled in the distance. The potential storage tubes were thus either connected in series for more effective suppression of clutter or they operated independently, one to select moving targets (SBZ) at close range, the second to suppress nonsynchronous interference pulses (UNS) over the entire range.

Picture gallery of P-12
Antennenwagen der P-12 MA

Figure 2: Antenna-truck of the “Spoon Rest A”
© 1997 Frank Roozendahl, license: GDFL and CC-BY-SA

Figure 3: Block diagramm of P-12 MA

Figure 4: Remote display