Direct Drive

@richardkrebs 

better DD TTs use a 3 phase motor,

Can you provide a list of any DD TT's that use a 3 phase motor.

The platter will slow down and a belt, thread, tape or rim drive, would slingshot the paltter up to momentary over speed once the high stylus drag reduces.

Thats funny.

My TT platter is 26kg, that you would think that immediately after Horowitz has banged out a C1 fortissimo on his Steinway, that the 26kg platter would suddenly take off into overshoot like your direct drive software going wonky is fanciful.

A heavy platter like that used on the Final Audio, will lower the rates of deceleration, acceleration. High inertia reduces the magnitude of speed changes, it does not eliminate them. 

The connotations of the words "immediately and "suddenly" aren't appropriate and I did not use them.

DD TTs using three phase motors. The new Technics, the SAT, VPI. I'm not sure about the NVS and the Monarch, but would be surprised if they weren't three phase, given their quality. Then of course there is the motor I build and install into my K3 design 

DD TTs using three phase motors. The new Technics, the SAT, VPI. I'm not sure about the NVS and the Monarch, but would be surprised if they weren't three phase, given their quality. Then of course there is the motor I build and install into my K3 design 

@richardkrebs 

So none of the 3 phase motored DD TT's are available under US$40k.

Any of the vintage use DD's use 3 phase motors ?

It would appear that the 3 phase argument you proposed is only as relevant in as much that only about 0.0000001% at most of DD TT's ever sold actually use a 3 phase motor. That would mean statistically your argument is irrelevant.

Where do I get 3 phase when my house is only single phase? Surely AC motors are asking for trouble.