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The Sadko-501 38-track tape recorder has been produced by the Kuibyshev Maslennikov Plant since 1973.
The tape recorder is designed to record and play back phonograms on magnetic tape with a width of 50.3 mm and a length of 300 meters.
LPS is built according to a single-motor kinematic scheme using an asynchronous, reversible electric motor of the type KD-3.5A.
The transition from track to track is carried out by a special mechanism for moving the head block.
The speed of the magnetic tape is variable, from 7 to 11 cm per second.
The detonation coefficient is 0.5%.
Duration of continuous recording 12 hours 40 minutes.
The recorder has a visual phonogram search device that allows you to quickly and accurately find the necessary phonogram.
The tape recorder provides automatic adjustment of the recording level, manual adjustment is also possible.
Tone control is performed by treble and bass.
Rated power output 8 watts.
Frequency band 60 ... 10000 Hz.
SOI - 4.5%.
The speaker consists of two loudspeakers.
Power consumption 50 watts.
Dimensions of the tape recorder - 630x350x265 mm, weight - 19 kg.
The retail price of the tape recorder is 300 rubles.
From 1973 to 1975, ~ 10 thousand tape recorders were released.
The tape recorder was not in demand, and only because of the price reduction, to 150 rubles in 1975, to 75 rubles in 1977 and to minuscule 22 rubles 50 kopecks in 1985, the tape recorder was sold out.