Radiola network lamp `` D-11 '' (11MG-2).

Network tube radiosDomesticRadiola network lamp console, with automatic change of plates "D-11" (another name "11MG-2" according to OST No. 370 A) from the beginning of 1938 produced the Voronezh plant "Electrosignal". "D-11" is a console radio, created on the basis of the "9H-4" radio receiver. The electric player has the ability to automatically change several installed phonograph records. Radiola "D-11" is intended for clubs, houses of culture, rural radio broadcasting centers. Radiola "D-11" is assembled on octal metal lamps and is powered from an alternating current voltage of 127 or 220 V, consuming 130 W when receiving radio or 170 W when playing records. Ranges DV - 750 ... 2300 m, SV - 177 ... 545 m, KV - 16.7 ... 50 m. Receiver sensitivity in all ranges of 50 ... 100 μV. Selectivity on the adjacent channel 24 ... 26 dB. The IF is 460 kHz. At any high frequency range, the receiver has two input circuits and a local oscillator circuit, 4 circuits are provided for the IF. The bass amplifier is push-pull, provides an output power of up to 12 W, with a nonlinear distortion of 10%. Loudspeaker 10GEM-1 with a powerful electric magnet, a cone diameter of 300 mm and a weight of 5.5 kg. The range of reproducible sound frequencies for radio reception is 80 ... 4000 Hz, when listening to records 80 ... 7000 Hz. The weight of the radio is 77 kg.