The variable voltage regulator lets you
adjust the output voltage of a fixed dc power supply between 1.2 and
37 V dc, and will supply the output current in excess of 1.5 A. The
circuit incorporates an LM117K three terminal adjustable output
positive voltage regulator in a TO-3 can.
Thermal overload protection and short
circuit current limiting constant with temperature are included in
the package. Capacitor C1 reduces sensitivity to input line
impedance, and C2 reduces excessive ringing. Diode CR1 prevents C2
from discharging through the IC during an output short.
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