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Since 1973, the portable reel-to-reel tape recorder Orbita-303 has been manufactured by the Leningrad plant Pyrometer. The portable four-track reel-to-reel tape recorder "Orbit-303" is intended for recording phonograms from a microphone, a pickup receiver, a television set, a radio line, and their reproduction. The tape recorder has the ability to work with movies and slide projectors. LSM is built on a twin-engine kinematic scheme. Speed "‹"‹of a broach of a tape of 9,5 cm / sec. The continuous recording time when using the No. 13 coils with a tape of type 10 is 4x45 minutes. Rated output power 0.5 watts. The band of operating frequencies 63 ... 10000 Hz. 1GD-28 or 1GD-40 loudspeaker is used. The tape recorder is powered by 8 elements 373 or an electrical network through a BP-12/5 rectifier prefix. The dimensions of the tape recorder are 310x210x105 mm, its mass is 5 kg. The first issues of tape recorders were called "Orbit-3".