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The radio tape recorder-prefix "Radio engineering MP-7210S" from I quarter of 1989 was produced by the Riga software "Radio engineering". Stereophonic MP "Radio MP-7210-stereo" is intended for recording of phonograms from various signal sources, with their subsequent reproduction through UCU. In the recorder-prefix there are systems of noise reduction and dynamic bias. The belt speed is 4.76 cm / s. Knock factor ± 0,19%. The effective frequency range on the LV for a magnetic tape with working layers of Fe2O3 and CrO2 is 40 ... 12500 Hz and 40 ... 14000 Hz. The total weighted signal-to-noise ratio on a magnetic tape with working layers CrO2 and Fe2O3 is 54 and 51 dB. Signal-to-noise ratio weighted with -60 dB noise reduction system. The ratio of the recorded signal to the erased -60 dB. Powered by MP from a network of 220 V. MP dimensions - 430x357.5x120 mm. Its weight is 6 kg.