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The radio receiver network lamp "5NS-20" from 1940 produced the Voronezh plant "Electrosignal". "5NS-20" is a (5-lamp, Desktop, Network, 20th development) radio receiver designed to receive local and / or long-distance radio stations in the range of average 187.5 ... 576 m (1600 ... 520 kHz) and long waves of 725 ... 2000 m (415 ... 150 kHz). An electrodynamic loudspeaker is installed in the radio receiver. Output undistorted receiver power 1.5, maximum 4 watts (distortion). The receiver works on metal lamps: 6A8, 6К.7, 6Г7, 6Ф6 and 5Ц4 (or 5Ц4С). The power consumed from the network about 60 watts. The radio operates on AC 110, 127 or 220 volts.