MOSFET Amplifier IRFP240/IRFP9240

Vertical mosfets need about 3,5V gate voltage to start conducting, low voltage drop on 0,33R or 0,47R source resistors have no efect on class AB bias thermal stability. You need source resistor with multiple output devices for current sharing with high output power.
Thanks again for the analytic explained.
Terry and others, you must redrawn the pcb. after this.
 
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There is pcb design with BC546 in line with outputs.
 

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