Why does the VPI motor thump

Perhaps my system being totally balanced (all XLR connections) including turntable and everything else has something to do with it???

String, you're using a SDS. That isolates the motor. No thump. So does a variac and performs the most important functions of a SDS (isolation and voltage reduction) though manually.

Bpoletti...thanks for the answer

@Stan (Stringreen) -- does your Classic 3 motor get very warm to the touch? Been playing my TT. It occurs to me that the new 300 rpm motor gets pretty warm to the touch, actually quite warm. The old 600 rpm motor, while warm, did not get as warm as the 300 rpm motor.

I'm trying not to use the word "hot", but the motor almost feels hot after use.

Any thoughts or comments??

Thanks

Bifwynne.....Actually, I have a modified Superscoutmaster rim drive.....doesn't get warm at all. Never heard of an overheating complaint from others I know who own a Classic 3