Low-cut and Bass controls
Output power: 40W on 8 Ohm and 60W on 4 Ohm load
Amplifier parts:
R1______________6K8 1W Resistor
R2,R4___________70R 1/4W Resistors
R3______________2K 1/2W Trimmer Cermet
R5,R6___________4K7 1/2W Resistors
R7______________220R 1/2W Resistor
R8______________2K2 1/2W Resistor
R9______________50K 1/2W Trimmer Cermet
R10_____________68K 1/4W Resistor
R11,R12_________R47 4W Wirewound Resistors
C1,C2,C4,C5______47µF 63V Electrolytic Capacitors
C3______________100µF 25V Electrolytic Capacitor
C6______________33pF 63V Ceramic Capacitor
C7______________1000µF 50V Electrolytic Capacitor
C8______________2200µF 63V Electrolytic Capacitor (See Notes)
D1______________LED Any type and color
D2______________Diode bridge 200V 6A
Q1,Q2___________BD139 80V 1.5A NPN Transistors
Q3______________MJ11016 120V 30A NPN Darlington Transistor (See Notes)
Q4______________MJ11015 120V 30A PNP Darlington Transistor (See Notes)
SW1____________SPST Mains switch
F1______________4A Fuse with socket
T1______________220V Primary, 48-50V Secondary 75 to 150VA Mains transformer
PL1____________Male Mains plug
SPKR___________One or more speakers wired in series or in parallel
Total resulting impedance: 8 or 4 Ohm
Minimum power handling: 75W
