25 Watt Power Amplifier based MosFet


25 watts 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 :
Resistor
R1,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)
 Capacitor
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
 Semiconductor
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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