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The power unit "Young Technician" (toy) since 1981 produced the factory "Uzhgorodpribor". With a load current of up to 0.5 amperes, the power supply unit provides a smooth adjustment of bipolar unstabilized voltage at the output from - 12 to 12 volts, alternating voltage from 0 to 10 volts and a step alternating voltage of 1.5, 3, 4.5, 6, 9, 12 and 18 volts. There is a short circuit protection.