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25 Watt Power Amplifier based MosFet

2015-01-01 15:09  
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25 watts power amplifier based MosFet 300x233 25 Watt Power Amplifier based MosFet

25 Watt power amplifier based MosFet,? can be connected directly to the signal source and does not require pre-amplifier to drive. The amplitude of the input signal must reach the level of 200 mV. This signal is normally present on the linear output recorder, CD player, computer sound card and other devices. To adjust the volume can be placed at the entrance to the potentiometer 10 kohm. Trimmer adjustable quiescent current. It must be within 100 mA.

Technical data:
Output power :? well in excess of 25 Watt RMS @ 8 Ohm (1KHz sine wave)
Sensitivity : 200mV input for 25W output
Frequency response : 30Hz to 20KHz -1dB
Total harmonic distortion @ 1KHz : 0.1W 0.014% 1W 0.006% 10W 0.006% 20W 0.007% 25W 0.01%
Total harmonic distortion @10KHz : 0.1W 0.024% 1W 0.016% 10W 0.02% 20W 0.045% 25W 0.07%
Unconditionally stable on capacitive loads

Power supply for this 25 watts power amplifier based MosFet can be found here.

Parts list :ResistorR1,R4 : 47K? 1/4W
R2 : 1/4W
R3 : 1K5? 1/4W
R5 : 390R?? 1/4W
R6 : 470R?? 1/4W
R7 : 33K?? 1/4W
R8 : 150K?? 1/4W
R9 : 15K?? 1/4W
R10 : 27R?? 1/4W
R11 : 500R?? 1/2W Trimmer Cermet
R12,R13,R16 : 10R?? 1/4W
R14,R15 : 220R?? 1/4W
R17 : 8R2??? 2W
R18 : R22?? 4W Resistor (wirewound)CapacitorC1 : 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 CapacitorSemiconductorQ1-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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