This circuit was found in an old manual of integrated circuits. The operational is of the time, uncommon nowadays. The power supply must be symmetrical.
This blocking oscillator configuration was found in a 1964 American book. The circuit can be...
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
This transmitter, indicated for espionage applications, is permanently powered by the power grid....