Click for Information on International Mail ServiceLM386 Audio Amplifier KitLM386 Audio Amplifier KitLM386 Audio Amplifier Kit
Kits and Parts dot Com
Supplying Toroids, Electronic Parts and Kits to Engineers, Schools and Hobbyists

Home
Place Order
Customer Portal
Trimmer Capacitors
NPO Disc Capacitors
Polystyrene Capacitors
Silvered Mica Capacitors
Crystals - Matched
W3NQN Filters
WA2EBY Toroid Kit
Variable Inductors
Magnet Wire
Diodes
Integrated Circuits
Jacks Plugs
Transistors - Fets
Misc Parts
RFtoolkits
Organic 5Watter Kits
Transceivers for 17,20,30,40 Meters
Toroids
Retired Kits
Contact
FAQ
Build this LM386 Audio Amplifier for $8.





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.

Toroids, Ferrites