Kits and Parts dot Com
Supplying Toroids, Electronic Parts and Kits to Engineers, Schools and Hobbyists

Home
Quotes & Ordering
Trimmer Capacitors
NPO Disc Capacitors
Polystyrene Capacitors
Silvered Mica Capacitors
Crystals - Matched
W3NQN Filters
WA2EBY ToroidKit
Variable Inductors
Magnet Wire
Diodes
Integrated Circuits
Jacks & Plugs
Transistors & Fets
Misc Parts
RFtoolkits
Organic 5Watter Kits
Transceivers for 17,20,30,40 Meters
Universal Receiver
1Watter-30m QRPp Xcvr
1Watter-40m QRPp Xcvr
1Watter-160m QRPp Xcvr
Toroids
Retired Kits
Contact
FAQ
Quotes & Ordering
Build this LM386 Audio Amplifier for $8.





LM386 PDF Spec Sheet
Maximum output at 8 ohms is about half (0,5) Watt using +12V
adjustable voltage gain via R1 and C4
optional positive and negative AGC sources.
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)
For maximum voltage gain, R1 should be a 0 ohms or a jumper.
C6 is not required and is not included in the kit.
Component holes at R4,D1,D2 and C9 are provided for optional AGC source parts.
A simple AGC circuit to control the Universal HF 612 mixer: Install a 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 C9 with the negative side to ground. Connect pin2 of J4 to the AGC input on the 612 HF mixer.

Toroids, Ferrites