The ‘-’ side of the new capacitor is connected to the circuit trace leading to the volume control. Mount this capacitor as close to the body of the new LM386 as possible. Keep all leads as short as possible. This modification results in very good speaker volume but will also require closer attention to battery quality and condition or else the audio circuits will cause oscillator instability. Two alkaline cells in parallel or a 12 volt supply are recommended. If the gain is too much, use a resistor to reduce the voltage supplied to pin 6 of preamp LM386
Finally, we remind you again that modification of any PC board puts you on your own, voiding your factory warranty, making your unit ineligible for factory repair. Make sure the receiver is working properly and that you understand how to use and repair it BEFORE making any changes in the original design. Enjoy it!
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