Linear Power Supply?

Thanks @lewm . My Roadrunner shows me 33.333 + .003 in operation and occasionally shows dead on 33.333 for stretches. I wonder if an LPS would tighten this up any more, if it matters. My measured W/F via Analog Magik is .06, which may in my estimation get even better if I were to upgrade my VPI inverted bearing to a ceramic ball and matching thrust plate.

By more precisely I meant would the motor run at a given speed with less measurable variance.

I do have a question into SOTA so I’ll see what they come back with.

I see much discussion out there about using LPS but nothing concrete about direct TT benefit. I do want to have some details on this as I don’t want to rely on an emotional response of mine.

SMPS technology may he applied to a high end power supply. Iirc CS Port uses them ( although they are run by a retired industrial power supply engineer )...but in general it seems a decent LPS is the easiest way to get into a better quality PS.

Yes better PS make a difference to turntable motor systems. 

A linear power supply is extremely simple.  It uses a transformer, diodes and capacitors and regulators to create a DC output from the incoming AC.

It's the oldest type of such converters and is in most high end audio gear.

A switch mode power supply is more complicated, much higher efficiency, much smaller, lighter and noise can really vary based on design.  Done well it's noise can be equal to or better than the best linear supplies.  Most are not done well. :)

I also have a Condor/Roadrunner. To get it more precise, level the plinth and platter better, and lube the bearing. I usually get 0.04 on Analog Magik or 0.02 on WFGUI by doing so on my VPI.

FWIW, the older Phoenix Eagle/Roadrunner used a LPS similar to the one SOTA has developed. Same case, even. The only difference between the Phoenix LPS and the SOTA LPS is that the latter has connections for both boxes.

Also, when I had the Eagle/Roadrunner, I had to separately ground the LPS. YMMV.

Like I said, it's a matter of individual perception.  Is there likely to be a measurable  advantage to the LPS vs the existing SMPS, in terms of noise in the audio signal or speed control accuracy?  No, I don't think so. But will you hear a difference? Maybe, because of how our brains work.  Brinkmann has for years offered a tube-based motor controller as an optional extra cost item compared to their standard solid state motor controller.  I can't think of a reason for it, but many end users report an improvement with tubes.  (The present situation is not analogous, of course.)