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Squelch "Episode-201" since 1982 produced the Sarapulsky plant named after Ordzhonikidze. NB is designed to suppress noise in the sound paths of electric guitars and other electromagnetic radiation, but can also be used to reduce noise in the recording and playback channels of tape recorders. The noise canceller consists of two channels, each of which has a noise cancellation control. The operating frequency range is 30 ... 30000 Hz. The nominal level of the input signal is 250 mV, the allowable limits are 1.5 ... 1000 mV. The harmonic coefficient of 0.4%. The power consumption of 10 watts from the mains. Dimensions 260x220x65 mm. Weight 2.5 kg. Price 70 rubles.