6A164 C
Characteristics of a vacuum tube operating as a Class C amplifier:
A.Low plate circuit efficiency, about 25%; practically no grid driving power; plate current flowing for 360 degrees of each cycle; practically no distortion of the output waveshape
B.Plate circuit efficiency, about 50-60%; plate current flows slightly more than 180 degrees of each cycle; medium power output
C.High plate circuit efficiency, up to 80%; plate current drawn in bursts; great distortion of output waveshape
D.None of the above
