Vacuum tube push-pull amp cathode current comparison of class AB and class A

Switching between class AB and class A operation at 1kHz sine wave
1:1 DC probe, display 0.2V/div over 4R7 resistor in cathode of fix biased 6P3S / 6L6 push-pull
AB class // Ua:430V Ia:20mA
A class // Ua: 340V Ia:60mA