Simple FM Radio with improved audio gain
Simple FM Radio with improved audio gain circuit
Wind 6 turns of solid wire on a pen or pencil that is just under 1/2 inch in diameter. Remove the wire from the pencil and spread the winding to make a length of 3/4 inch. Solder C2 somewhere near the middle of the coil.
8521 28 August 2007
Circuit of simple, high quality preamp. Has all the facilities normally expected.
This circuit can be used to remotely monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator.