LM386 PDF Spec Sheet
Maximum output at 8 ohms is about half (0,5) Watt using +12V power.
12 volt operation; adjustable voltage gain via R3 and C4; optional AGC source.
All parts are included to configure the LM386 Amp kit for maximum gain.
This Audio Amp circuit can be configured for a differential or single ended input.
The suggested single ended input is to ground pin 2 of the 386 (holes provided) and
pin 3 should have a 68n capacitor to ground to prevent high freq oscillations and
to roll off the very high audio frequencies.
For maximum voltage gain, R3 should be a 0 ohms or a jumper wire.
C7 is not required and is not included in the kit.
Component holes at R4,D1,D2 and C8 are provided for optional AGC source parts.
A simple AGC circuit to control the Universal HF 612 mixer: Install the red LED at D2. Align the flat side of the LED with the PCB outline. Install a jumper wire at R4 and install a 220uF electrolytic cap at C8 with the negative side to ground. Connect pin2 of J4 to the AGC input on the 612 HF mixer.