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The portable cassette stereo tape recorder "Spring-212S" since 1985 was produced by Zaporozhye electrical machine-building plant Iskra. The tape recorder of the II group of complexity "Spring-212-stereo" (in the documentation and on the model case is simply "Spring-212") provides for recording stereo and monophonic phonograms with the subsequent playback of the recording through the built-in speaker. It is possible to: automatically stop the tape recorder at the end of the tape in the cassette or malfunction of the cassette, as well as during the operation of the "Memory" device; control the recording level by dial and peak LED indicators; use of two types of magnetic tapes; switching tape types; control of supply voltage by dial indicator; automatic adjustment of the recording level; separate timbre control on treble and bass. The noise reduction system provides a reduction in noise when playing a recording. The presence of a three-decade tape flow meter with a "Memory" device allows you to quickly find the necessary records and determine the tape consumption. Power supply from 8 elements 373 or from the AC network from the built-in rectifier. The case of the tape recorder is made of impact-resistant polystyrene. Includes two cassettes MK-60. Type of magnetic tape A4205-3 or A4212-ZB. The speed of the magnetic tape is 4.76 cm / s. The maximum recording or playback time is 2x30 minutes. The working frequency range when using a magnetic tape: Ð4205-3 - 40 ... 12500, Ð4212-ЗБ - 40 ... 14000 Hz. Knock factor ± 0,25%. The harmonic coefficient at the linear output of 4.0%. The relative level of noise and interference in the channel recording and playback: without the school when using a tape A4205-3 -50 dB, A4212-ZB -52 dB, with the USA -53 and -55 dB, respectively. Output power: maximum 2x4 watts, rated 2x1.5 watts. Power supply: from the elements of 12 V, from the electrical network of 220 V. The power consumption from the network - 10 watts. Dimensions of the tape recorder - 480x195x155 mm. Weight 6 kg. Price 320 rubles. The tape recorder was released in a limited series (about 300 copies) after which its production was transferred to the Zaporozhye tape recorder plant "Spring".