Dipton 1979
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Surround sound device "Dipton" was produced since 1979 by Lviv software named after Lenin. "Dipton" can serve as a prefix to a tape recorder, electric microphone, radio, radio, subscriber loudspeaker and other signal sources. With this device, monaural programs will acquire a new color, their sound will approach stereo. Converted by "Dipton" programs can be listened to through stereo phones or stereo amplifier speakers. "Dipton" is reliable, compact, easy to use. The prefix price is 50 rubles (initial 45 rubles). Sensitivity from a universal input 250 mV, broadcast 30 V. Harmonic coefficient of 0.5%. Signal to noise ratio 60 dB. The phase shift between the signals at the output in the frequency band of 20 ... 20,000 Hz is 90 degrees. Since the beginning of 1980, the Ryazan Instrument Plant also produced a similar surround sound device, with the name "Dipton-R" (Ryazan). ,null,ru,null,null,null,null
Documentation:
Information from collection of Valery Khartchenko