This circuit was obtained in an 1975 English publication. It is a voltage regulator circuit for currents up to 5 A and an input voltage up to 70 V with output up to 60 V. The transistor 2N3055 must be equipped with an excellent heatsink. The output voltage is set in the potentiometer within the permitted range. We made some changes in the original circuit to enable its assembly with updated components.
