Sunday, January 16, 2011

18 Watt RMS Amplifier Using TIP41|42

This amplifier Circuit has output 18 Watt RMS into 8 Ohm and Frequency response 30Hz to 20KHz. It’s simple to build and you don’t need preamplifier. Besides that this Amplifier Circuit is also directly connected to Can some CD players, tuners and recorders tape. Do not exceed 23 + 23V supply. Of Q3 and Q4 must be mounted on heatsink. D1 must be in thermal contact with the Q1. Quiescent current (best measured with an Avo-meter in series with Q3 Emitter), is not critical. Adjust R3 to read a current Between 20 to 30 mA with no input signal.


List Component:
P1    : 2K   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   Trimmer Cermet (optional)
C1    : 470nF    Polyester Capacitor
C2,C5 : 100µF/3V Tantalum bead Capacitors
C3,C4 : 470µF/25V Electrolytic Capacitors
C6    : 100nF   Polyester Capacitor
D1    : 1N4148  150mA Diode
IC1   : TLE2141C  Op-amp
Q1    : BC182   NPN Transistor
Q2    : BC212   PNP Transistor
Q3    : TIP42A  PNP Transistor
Q4    : TIP41A  NPN Transistor

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