Power tube electric microphone `` Volga ''.
Electric players and tube electrophonesDomesticSince the beginning of 1957, the Volga network tube electric microphone has been produced by the plant No. 205 named after NS Khrushchev of the Saratov SNKh. The compact tube radio gramophone (electrophone) "Volga" is made in an oval cardboard box, pasted over with pavinol or leatherette. Its dimensions are 364x315x150 mm. The main components of the apparatus are the same as in the Yubileiny radio gramophone, but a more advanced electric motor is installed. The speaker uses a 1GD-9 loudspeaker mounted on the rear wall of the box. In the three-stage ULF, 6N8S and 6P6S lamps are used. To reduce distortion, the second and third stages are covered by negative feedback. Treble tone control is carried out in the negative feedback circuit. The rated output power of the ULF is 1 W, the maximum is 2 W. Background level -35 dB. The band of reproducible sound frequencies is 100 ... 7000 Hz. A full-wave rectifier based on a 6Ts5S kenotron was used to power the amplifier. The weight of the radio gramophone is about 6 kg.
