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Discussion in 'Amp Tech Center' started by DennisM, Oct 15, 2020.
I always set it slightly cool for my taste as I hate burning the valves out so fast. When I repair or re-valve any Fender, I set the bias as per the service manual.
I set a fixed bias PP amp so the plate dissipation is close to 70% max and play it some. Then try it a little higher and lower and find what sounds best.
i try and hit that ballpark 60-70% figure, but then set it so that i get a good compromise between minimizing crossover distortion or minimizing hum.