Electric players '' GP-46 '' and '' GP-55 ''.
Electric players and tube electrophonesDomesticElectric players "GP-46" and "GP-55", respectively, from 1946 and 1955 were produced by the Moscow experimental plant "Agregat". The "GP-46" electric player (Gramophone Prefix 46 years old) is designed to play standard records at a speed of 78 rpm in conjunction with any radio receiver that has an adapter input for a magnetic pickup. Under the top cover, the letters "MMZ" were inscribed, a kind of visiting card of the plant, a logo. After the plant was renamed into a license plate, under the top cover there was "No. 615". The MS-1 synchronous motor, when turned on, began to rotate only with a slight manual unwinding. The electric player had an electromagnetic pickup with an output voltage of up to 1.5 volts and a reproducible frequency range of 100 ... 5000 Hz. The needles in the pickup used a gramophone, a loud or quiet tone had no effect on the sound quality in comparison with a gramophone. This was explained by the lower weight of the pickup, compared to the gramophone. An even lower load was provided by the PZ-1 piezoelectric pickup, which the plant has been installing on an electric turntable since 1950. The second version of the player has been produced since 1955 under the name GP-46U, according to some sources, GP-55. It was a two-speed 33, 78 rpm with a piezoelectric pickup, two corundum needles changeable by turning, depending on the speed of the record being played. The engine was already asynchronous with auto start.
