Found in a 1964 Electronic Design, this circuit shows how to modulate a signal with a dynamic low impedance microphone. The circuit operates in the FM range (88 to 108 MHz).
This two-transistor MW radio was found in a publication from 1958. It uses one of the oldest type...
Found in a 1988s Radio Electronics, this circuit uses transistors of general use to increase the...
This circuit can be applied to other 3-terminal regulators and equivalent transistors can be used....