18watt Audio Amplifier

High Quality very simple unit, No need for a preamplifier



Circuit Diagram:



18watt Audio Amplifier



Circuit Diagram:



Power Supply circuit Diagram



Amplifier parts:

P1 = 22K
R1 = 1K
R2 = 4K7
R3 = 100R
R4 = 4K7
R5 = 82K
R6 = 10R-1/2W
R7 = 22R
R8 = 1K-1/2W (optional)
C1 = 470nF-63V
C2 = 100µF-3V Tantalum bead Capacitors
C3 = 470µF-25V
C4 = 470µF-25V
C5 = 100µF-3V Tantalum bead Capacitors
C6 = 100nF-63V
D1 = 1N4148
IC1 = TLE2141C
Q1 = BC182
Q2 = BC212 50V 100mA PNP Transistor
Q3 = TIP42A
Q4 = TIP41A
J1 = RCA audio input socket



Power supply parts:

R9 = 2K2
C7 = 4700µF 25V
C8 = 4700µF 25V
D2 = 100V 4A Diode bridge
D3 = 5mm. Red LED
T1 = 30VCT, 50VA Mains transformer
PL1 = Male Mains plug
SW1 = SPST Mains switch



Notes:


Source : www.redcircuits.com