This oscillator for the fifth overtone of a crystal was found in a Radio Electronics magazine from May 1970. Transistors are RF types, and the transistor determines the maximum frequency achieved.
This circuit was found in an old American publication. The transformer is the type of output found...
This circuit is from an old Popular Electronics, but it can be easily implemented nowadays, even...
This circuit produces signals that depend on the input control voltage. It is a Voltage Controlled...