This converter has coils according to the reception and converted frequency bands. We found it in the October 1989 Radio Electronics magazine in an article that teaches its construction.
In the figure we present a circuit of a microphone signal conditioner using the SSM2167 integrated...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
This circuit was obtained in an English publication of 1993. It is an amplifier for...