Transistor network electrophone '' School-Stereo ''.
Electric record players and electrophones on semiconductorsDomesticSince the beginning of 1985 the Grozny RTZ has been producing the transistor network transistor microphone "School-Stereo". Stereophonic electrophone of 3 complexity group "School-stereo" is intended for playing sound recordings from gramophone records of all formats, amplifying external signals and recording from gramophone records to a tape recorder. Rated output power 2x3 W. The range of reproducible frequencies in terms of voltage, with an unevenness of 3 dB - 56 ... 14000 Hz. Harmonic distortion at rated power 2.5%. Crosstalk attenuation between channels 35 dB. The maximum power of the ultrasonic frequency converter, limited by harmonics 10% - 10 W. Background level -50 dB. The range of tone control is ± 10 dB. The limits of the stereo balance adjustment are 8 dB. The electrophone is powered from a 220 V network. Power consumption is 40 watts. The weight of the microphone is 8.5 kg, one speaker is 4 kg. Dimensions of the model 420x370x165 mm, АС 250x220x360 mm. To increase the assortment, the plant produced such electrophones of the same design, electrical circuit and design as: "School EF-301S", "School EF-302S", "School EF-302S-1", "Sintar EF-302S" and "Sintar EF -302C-1 ".
