I have a 1942 MG that won't go past about 975 rpm. Following some other threads, I checked the voltages at terminals E1 and E2 inside the DC control panel. With the spindle running it is about 128 dcv regardless of speed control knob position. Measuring terminal GS1 to GA2 varies with knob position from about 20 dcv to 350 dcv. I notice the top center ap relay functioning, but I don't ever see the top right or top left ones move. Thank you for any knowledge of what to check next.