Kikusui PAB Series Regulated DC Power Supplies are compact, light, transistorized series regulator type, and provides larger current rates for its sizes. The output voltage is finely variable for a range of 0 to the rated voltage with a 10-turn potentiometer or a combination of coarse and fine adjustment potentiometers. A voltmeter and an ammeter are mounted on the front panel. To guard against overload and shorting of the output circuity PAB Series are incorporated with a constant-current-type current limiting circuit which operates positively. The limiting current value is continuously variable for a range of 10$ - 100% of the rated current, and PAB Series can be used as a constant-current power supply. Two units of the same model can be operated in parallel in a one-control mode (master-slave mode) of operations thereby doubling the output current rating. Up to four unit can be installed on a 19-inch standard rack, using the frame and mounting brackets which are available as options.