This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave band. We found it in the Radio Electronics magazine of February 1989.
This circuit can drive a loudspeaker with near 1 W of Power from 6 to 9 V supplies. The circuit...
This audio oscillator has its frequency determined by C1, C2 and the inductor. The inductor can be...
This variable high pass filter covers the range from 23 Hz to 700 Hz with the components used. The...