This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This circuit is from a 1977 documentation. It is powered by the power supply of the circuit under...
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....
You can adjust the frequency produced by a ring oscillator with three inverters inserting a...