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E7B08

What is the procedure for tuning a vacuum-tube power amplifier having an output pi-network?

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AAdjust the loading capacitor to maximum capacitance and then dip the plate current with the tuning capacitor
BAlternately increase the plate current with the loading capacitor and dip the plate current with the tuning capacitor
CAdjust the tuning capacitor to maximum capacitance and then dip the plate current with the loading capacitor
DAlternately increase the plate current with the tuning capacitor and dip the plate current with the loading capacitor