Mini-box 2 W Amplifier

Circuit diagram:

Parts:

P1_____________10K   Log.Potentiometer

R1,R2__________33K   1/4W Resistors
R3_____________33R   1/4W Resistor
R4_____________15K   1/4W Resistor
R5,R6___________1K   1/4W Resistors
R7____________680R   1/4W Resistor
R8____________120R   1/2W Resistor
R9____________100R   1/2W Trimmer Cermet

C1,C2__________10µF   63V Electrolytic Capacitors
C3____________100µF   25V Electrolytic Capacitor
C4,C7_________470µF   25V Electrolytic Capacitors
C5_____________47pF   63V Ceramic Capacitor
C6____________220nF   63V Polyester Capacitor
C8___________1000µF   25V Electrolytic Capacitor

D1___________1N4148   75V 150mA Diode

Q1____________BC560C  45V 100mA PNP Low noise High gain Transistor
Q2____________BC337   45V 800mA NPN Transistor
Q3____________TIP31A  60V 4A    NPN Transistor
Q4 ___________TIP32A  60V 4A    PNP Transistor

SW1___________SPST switch

SPKR__________3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance