The purpose of this circuit is to reduce the ripple of a power supply. The circuit is from a Radio Electronics from March 1985. The transistor must have a capacitance according to the source.
This circuit for cars with mechanical breakers (contact breakers) was found in the April 1969...
The voltage of 13.2 V is closer than what we find in a car battery than 12 V. Thus, a 13.2 V zener...
The amplifier shown in the figure is characterized by the very high input impedance, given by the...