We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
We found this configuration in a Radio Electronics from 1989. The circuit can be designed with...
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
This circuit sends its signals to short wave receivers and even FM outside stations placed nearby. As...