60 Watt MosFet Audio Amplifier

Posted on Feb 6, 2014

R1_47K 1/4W Resistor R2_4K7 1/4W Resistor R3_22K 1/4W Resistor R4_1K 1/4W Resistor R5, R12, R13_330R 1/4W Resistors R6_1K5 1/4W Resistor R7_15K 1/4W Resistor R8_33K 1/4W Resistor R9_150K 1/4W Resistor R10_500R 1/2W Trimmer Cermet R11_39R 1/4W Resistor R14, R15_R33 2. 5W Resistors R16_10R 2. 5W Resistor R17_R22 5W Resistor (wirewound) C1_470nF 63V Polye

60 Watt MosFet Audio Amplifier
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ster Capacitor C2_470pF 63V Polystyrene or ceramic Capacitor C3_47 µF 63V Electrolytic Capacitor C4, C8, C9, C11_100nF 63V Polyester Capacitors C5_10pF 63V Polystyrene or ceramic Capacitor C6_1 µF 63V Polyester Capacitor C7, C10_100 µF 63V Electrolytic Capacitors D1_1N4002 100V 1A Diode D2_5mm. Red LED Q1, Q2, Q4_MPSA43 200V 500mA NPN Transistors Q3, Q5_BC546 65V 100mA NPN Transistors Q6_MJE340 200V 500mA NPN Transistor Q7_MJE350 200V 500mA PNP Transistor Q8_IRFP240 200V 20A N-Channel Hexfet Transistor Q9_IRFP9240 200V 12A P-Channel Hexfet Transistor R1_3K9 1W Resistor C1, C2_4700 µF 63V Electrolytic Capacitors (See Notes) C3, C4_100nF 63V Polyester Capacitors D1_400V 8A Diode bridge D2_5mm. Red LED F1, F2_4A Fuses with sockets T1_230V or 115V Primary, 30+30V Secondary 160VA Mains transformer PL1_Male Mains plug SW1_SPST Mains switch To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 90W High Quality power amplifier design is presented here. Circuit topology is about the same of the above mentioned amplifier, but the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as the output pair, and well renowned high voltage Motorola`s transistors are employed in the preceding stages. The supply rails voltage was kept prudentially at the rather low value of + and 40V. For those wishing to experiment, the...

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