Schematic & Wiring Diagram

18W Amplifier Schematic Circuit

18W Amplifier Schematic Circuit Part List

P1_____________22K Log. Potentiometer (Dual-gang for stereo)

R1______________1K 1/4W Resistor

R2______________4K7 1/4W Resistor

R3____________100R 1/4W Resistor

R4______________4K7 1/4W Resistor

R5_____________82K 1/4W Resistor

R6_____________10R 1/2W Resistor

R7_______________R22 4W Resistor (wirewound)

R8______________1K 1/2W Trimmer Cermet (optional)

C1____________470nF 63V Polyester Capacitor

C2,C5_________100µF 3V Tantalum bead Capacitors

C3,C4_________470µF 25V Electrolytic Capacitors

C6____________100nF 63V Polyester Capacitor

D1___________1N4148 75V 150mA Diode

IC1________TLE2141C Low noise, high voltage, high slew-rate Op-amp

Q1____________BC182 50V 100mA NPN Transistor

Q2____________BC212 50V 100mA PNP Transistor

Q3___________TIP42A 60V 6A PNP Transistor

Q4___________TIP41A 60V 6A NPN Transistor

J1______________RCA audio input socket

Power supply parts:

R9______________2K2 1/4W Resistor

C7,C8________4700µF 25V Electrolytic Capacitors

D2_____________100V 4A Diode bridge

D3_____________5mm. Red LED

T1_____________220V Primary, 15 + 15V Secondary, 50VA Mains transformer

PL1____________Male Mains plug

SW1____________SPST Mains switch Advertisement: