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The stabilized power supply unit "BPS-220 / 127-9 / 12" was produced presumably from 1978 to 1992. The power supply unit is designed to supply radio or electrical equipment with a stabilized voltage of 9 or 12 volts with a consumed current of up to 200 mA and an unstabilized voltage from 0 to 24 volts with a consumed current of up to 1 A.