Power supply, 127-220/9 volts 25-30 milliamps. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Power Supplies
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The power supply is a combination of a full-wave rectifier and a parametric voltage stabilizer on a zener diode.
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The output voltage of the device is 9 V at a current of 25-30 mA. Quenching capacitors C1 and C2 determine the amount of current consumed by the device from the network. Capacitor C3 serves as a filter to smooth out ripples), and resistor R2 and zener diode V5 form a parametric voltage regulator.
Details. Diodes type D226; zener diode D814B or D809; capacitors C1, C2 types KBG, BMT.
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