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Since 1972, the Sonata-303 reel tape recorder has been producing the Velikiye Luki Radio Plant.
The tape recorder is an analogue of the Sonata-III model and the last lamp apparatus of the radio plant.
It is designed for 2-track recording.
The speed of the magnetic tape is 9.53 cm / sec.
The detonation coefficient of 0.3%.
Recording is made on type 10 magnetic tape. The duration of recording on reels with 375 meters of tape is 65x2 minutes.
The erase generator frequency is 60 kHz, the relative erase level is -85 dB.
The rated output power is 1 W, with a SOI on the equivalent of loudspeakers 5%, the voltage of the linear output is 0.25 ... 0.5 V. The operating frequency range is 63 ... 10000 Hz.
There is a treble tone.
Power consumption 75 watts.
The dimensions of the tape recorder are 379x303x164 mm, weight 9.5 kg.
A detailed description and electrical diagram of the model are given in the instructions and on the page of the Sonata-III tape recorder.