Noise reduction LM386
Low-frequency amplifiers with LM386 quite often appear in various receivers and transceivers of amateur design due to the ease of connection. However, this IC is characterized by relatively high noise, which can be suppressed by choosing a suitable connection. Even finished amplifiers can be easily modified. This modification was described by KA4UOS in Sprat No. 79, but first appeared in the Oklahoma QRP Group newsletter. Just add one resistor and a capacitor according to the diagram. In finished devices, they can be added to the bottom of the printed circuit board.
