This circuit was found in a Philips documentation from 1966. Its purpose is to drive the solenoid of an electric typewriter of the time.
This oscillator does not carry any resonant circuit, except for the one formed by the crystal...
This is the circuit of a small commercial amplifier from the 1970s from Philips Argentina. The...
This powerful high-fidelity amplifier was described in an article in Radio Electronics magazine in...