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Transistor "Russia-102-stereo" and "Russia-102-1-stereo" network transistors since 1980 and since 1985 produced Chelyabinsk PO "Flight". The stereo phone of the first group of complexity "Russia-102-stereo" consists of UCU located in one building, made on the basis of the UCU "Radio-020-stereo" and 2-speed EPU G-602S, produced by the NDP. There is an external portable speaker AC 25AS-2, each of which has dynamic heads 25GD-26, 6GD-6 and 3GD-31. EPU has a compensator rolling force, the control of the downforce of the pickup, auto-stop and lifter. In the EPU provides adjustment of the rotational speed of the disk and its control by the stroboscope. The microphone can operate in a pseudo-quad mode, for this purpose it provides an output for connecting additional rear speakers. There is a light indication of the overload of the power amplifier, stepwise as well as a smooth change in volume, the ability to turn off the loudness mode. Rated output power of at least 2x20 watts. Nominal frequency range of 30 ... 20000 Hz. Detonation coefficient EPU 015%. Power consumption 80 watts. Dimensions of the model 465x420x190 mm. Weight 15 kg. Price 355 rubles. The stereo speaker of the first group of complexity "Russia-102-1-stereo" is similar in design, wiring diagram and layout to the model "Russia-102-stereo". The difference in components and price. The microphone provides reproduction of mono and stereo records and consists of EPU - I-EPU-95SM, an amplifier and switching device, combined in one package and two speakers of type 25AC-309. The headphone has a super-drive direct drive motor, a disk speed control device with a stroboscope, downforce regulator, skidding force compensator, microlift, auto-stop, overload light indication, step-down volume, pseudo-quad sound. The frequency of rotation of the disk 33 1/3; 45 rpm The operating frequency range of the sound is 30 ... 20000 Hz. Knock factor - 0.15%.SOI - 0.5%. The relative level of boom with a weighing filter of -60 dB. The background level is -52 dB. Rated output power 2x20 watts, maximum 2x30 watts. Pitane is an alternating current network of 220 V. The power consumed from the electric network is about 80 watts. Electrophone dimensions - 465x420x185 mm. Weight 15 kg. Price 435 rubles.