Transistor network electrophones "Concert-301" and "Concert-201".
Electric record players and electrophones on semiconductorsDomesticTransistorized electrophones "Concert-301" and "Concert-201" have been produced since 1972 and 1973 by the Moscow experimental plant "Agregat". The stationary two-unit electrophone "Concert-301" consists of an electric player "Concert-M" and an electro-acoustic unit "Escort". EPU III-EPU-28M is designed for three speeds of rotation of the disk; 33, 45 and 78 rpm. Other EPUs could also be used. In the photo, the EPU II-EPU-40 is used in the model. Pickup head GZK-661A. The range of reproducible frequencies at the output of the pickup is 150 ... 7000 Hz. Dimensions of the electric turntable 350 x 320 x 150 mm, weight 4.5 kg. Electro-acoustic unit "Escort" consists of ULF, power supply unit and AC where a broadband loudspeaker of type 4GD-28 is installed. The amplifier is based on nine transistors. Maximum output power 4 W, audio frequency range - 100 ... 10000 Hz. Block dimensions 350 x 320 x 125 mm, weight 4.5 kg. In 1973, the electrophone was modernized by improving the electrical circuit of the acoustic unit, installing an EPU type II-EPU-40 and, in this regard, transferred to the 2nd class. The new model became known as "Concert-201". About the model below.