HF radio receiver R-311 “Omega”- Soviet shortwave radio for military use with self-powered.
The receiver was developed in the design bureau of the Aleksandrovsky radio plant since 1949 on the basis of the R-253 “Alpha” receiver. Serial production began in 1954, entered service in 1956. Production continued until at least 1975. Produced at least 60,000 pieces.
One of the most common tube connected receivers in the Armed Forces of the USSR. Intended for range 1 to 15 MHz in five scales. Receives AM, CW. The receiver is assembled according to a superheterodyne circuit with one frequency conversion on eight 2Zh27L pentodes.
The frequency range of the receiver is divided into five sub-bands:
(I) 1.0 – 1.88 MHz
(II) 1.88 – 3.30 MHz
(III) 3.30 – 5.58 MHz
(IV) 5.58 – 9.20 MHz
(V) 9.20 – 15.0 MHz
The receiver is a superheterodyne design with one frequency conversion.
2KN-24 battery and VP-3M2 vibration sensor (continuous operation time not less than 12 hours)
Battery 2KN-24 and anode battery BAS-80 (time of continuous operation not less than 24 hours)
AC 127 or 220 V through a VS-3 rectifier