Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio Electronics magazine from October 1989. The coils are indicated.
Found in a 1964 Electronic Design, this circuit shows how to modulate a signal with a dynamic low...
This circuit was found in a 1971s English magazine. We can still assemble it using BC548...
This circuit was obtained in a Popular Electronics of the 90s. The circuit uses integrated from...