Reel-to-reel tape recorder '' Sonata-303 ''.
Tape recorders and radio tape recorders.Since 1972, the Sonata-303 reel-to-reel tape recorder has been producing the Velikie Luki Radio Plant. The tape recorder is an analogue of the Sonata-III model and the last tube apparatus of the radio factory. It is designed for 2-track recording. The speed of the magnetic tape is 9.53 cm / sec. Knock coefficient 0.3%. Recording is made on a magnetic tape of type 10. The duration of recording on reels with 375 meters of tape is 65x2 minutes. The erasure generator frequency is 60 kHz, the relative erasure level is -85 dB. Nominal output power 1 W, with THD on the loudspeaker equivalent 5%, linear output voltage 0.25 ... 0.5 V. Operating frequency range 63 ... 10000 Hz. There is a treble tone. Power consumption 75 watts. The dimensions of the tape recorder are 379x303x164 mm, weight is 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" recorder.
