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The stereo-set-top box "Spring-102-stereo" in 1980 was experimentally produced by the Zaporizhzhya EMZ "Spark".
The device is made on the basis of a 2-motor tape drive with direct drive and has a through channel for recording and playback.
To control the modes of its operation, a logical system is used, which is triggered when the contacts of the key switch are closed.
The device is equipped with a switchable noise reduction device with an adjustable threshold, a meter of magnetic tape with memory, peak overload indicators, a push-button input switch, a hitch that turns off the engine at the end of the cartridge.
The model provides light indication of the operating modes of the CVL and adjustment of the speed of the tape within ± 3%.
The set-top box recorder is designed to work with two types of magnetic tape, based on chromium dioxide (CrO2) and iron oxide (Fe2O3).
Frequency range on a magnetic tape made of chromium dioxide 40 ... 18000 Hz, iron oxide 40 ... 12500 Hz.
Knock coefficient ± 0.18%.
Dimensions MP 464x380x140 mm.
Weight is 9 kg.