Is the Technics SP10R motor controller using a switching power supply

It apparently does use a switching PS but I don’t know about the variability of the voltage.

This from the Technics website:

To reduce the noise reaching the pickup, the switching power supply is equipped with a unique technology that provides a voltage supply with minimal noise by a newly developed "unwanted noise reduction circuit".

I’ll add, perhaps more to the point, that the Mk3 I bought was 100v. I was planning to run it with a Monarchy AC regenerator, which allows output voltage selection from 100 to 120. You could do the same with your R. I think Monarchy closed shop but you can probably find one used if you look. It was not expensive, something like $600, as I recall.

@ddriveman, the SP10Mk3 plinth should be a drop in for the SP10R. I ordered my Artisan Fidelity Panzerholtz plinth for a Thalmann-refurbished SP10M3 that was "lost" at the FedEx depot 22 miles from my home in No Cal the day before delivery. This was in June 2020, when shippers were suddenly overwhelmed by the pandemic. I have my suspicions. Anyway, because I bought the Mk3 from someone in Michigan and had it shipped directly to Bill in VA, who then shipped it to me, I never even got to see it. So near but yet so far! With the plinth already being made, I decided to pivot into the R. Luckily, one unit happened to be sitting in the Technics warehouse here in the States. Someone had ordered it and then suddenly backed out, likely because of a change in finances due to Covid. The typical wait had been around 3 months. Chris at AF received it within days from Technics and dropped it into the plinth, QED. Yours should fit no problem, although the grounding-rod arrangement Albert uses might need some relatively minor adjustment.

I find the R to be oddly sensitive to AC, which would seem to fly in the face of reason. Its speed never wavers, of course, but its sound can be subtly more or less tense depending on power cords and especially AC quality. Don’t ask me why. This is not the case with my other two turntables, a Brinkmann Oasis and a Nantais Lenco. I like the R best plugged into the Monarchy. Based on this experience, I’d be hesitant to use a stepdown that doesn’t reconstitute and stabilize the AC. But that’s me. Plenty of people report good results with them on their Technics.

@lewm , I never said he NEEDED anything. Just mentioned an option. And yes, as I said, the "Monarchy thing" is indeed a regenerator....

Lewm, thanks for that, and your points are well taken. A step down can certainly do the job, and with the added benefit of isolating from the mains.

A glance at his system page suggested to me that the OP is a pretty sophisticated audiophile. I figured he knew about step downs, which are not esoteric, but perhaps not the Monarchy, which is a pretty nifty gizmo--and cheap for its type-- that not only regenerates the AC but can step it down (and change frequency) if one wishes. Just trying to add to the info pool.