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25 Watt MOSFET Audio Amplifier

2015-01-01 22:28  
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25 Watt MOSFET Audio Amplifier

 

25 Watt MOSFET Audio Amplifier

 


High-Fidelity Amplifier. Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need. # 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. # An earlier prototype of this amplifier was recently inspected and tested again after 15 years of use.


25 Watt MOSFET Audio Amplifier












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