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Skema Rangkaian 25Watt Mosfet Note:
- Q6 & Q7 must have a small U-shaped heatsink.
- Q8 & Q9 must be mounted on heatsink.
- Adjust
R11 to set quiescent current at 100mA (best measured with an Avo-meter
connected in series to Q8 Drain) with no input signal.
- A
correct grounding is very important to eliminate hum and ground loops.
Connect to the same point the ground sides of R1, R4, R9, C3 to C8.
Connect C11 to output ground. Then connect separately the input and
output grounds to power supply ground.
List Component
R1,R4_________47K 1/4W Resistors R2____________4K7 1/4W Resistor R3____________1K5 1/4W Resistor R5__________390R 1/4W Resistor R6__________470R 1/4W Resistor R7___________33K 1/4W Resistor R8__________150K 1/4W Resistor R9___________15K 1/4W Resistor R10__________27R 1/4W Resistor R11_________500R 1/2W Trimmer Cermet R12,R13,R16__10R 1/4W Resistors R14,R15_____220R 1/4W Resistors R17___________8R2 2W Resistor R18____________R22 4W Resistor (wirewound) C1___________470nF 63V Polyester Capacitor C2___________330pF 63V Polystyrene Capacitor C3,C5________470µF 63V Electrolytic Capacitors C4,C6,C8,C11_100nF 63V Polyester Capacitors C7___________100µF 25V Electrolytic Capacitor C9____________10pF 63V Polystyrene Capacitor C10____________1µF 63V Polyester Capacitor Q1-Q5______BC560C 45V 100mA Low noise High gain PNP Transistors Q6_________BD140 80V 1.5A PNP Transistor Q7_________BD139 80V 1.5A NPN Transistor Q8_________IRF530 100V 14A N-Channel Hexfet Transistor Q9_________IRF9530 100V 12A P-Channel Hexfet Transistor
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