Plinth ideas for DENON PD-80 DD turntable

  are 100 volt and i have 1000 watt step down transformer

have you the brand or link for research?

@best-groove Those russian toroidal step-down transformers are cheap:

Here you can find 1600w version, i use the same, but 1000w.
They are all available for japanese (100v) or for american (110v).
Stepdown auto-transformers from 220/140 to 100 (or to 110v) depends on the version. 

New models designed for audio:
"Unlike the auto-transformer, the transformer provides galvanic isolation of the load circuit from the mains. The transformer acts as a filter for impulsive noise arising in the primary network."

you can read here about 100w version and here about 400w version.

I have 2 1000W step/down/up transformers — and never use them. No need. I live in the US and most products — Asian, British, European — make US versions because the market is so large. At present I need only one, for my DP80, and it can be very small: more convenient, smaller than my SUT. The only other time I recall that I needed a big transformer was many years ago: a 100V Luxman tube integrated, never imported here.

If I lived overseas, however, it would be as essential to a good audio system as an amplifier. I was planning to live elsewhere, and acquired a whole collection for that purpose, maybe 20 in all, from very big to small. But sadly that relocation didn’t happen. Though born and raised here, my country, as it is now, doesn’t feel like home.

I wish someone can spread the light on step down transformers subject. 
I've been using cheap and small (made in china) before, but upgraded to the big and heavy local monsters long time ago. I use powerful stepdown transformers, because i connect at least 2 turntables to each stepdown device and i want to be abble to connect even 4 turntables to ONE stepdown trans if needed. 

The majorty of step-down transformers on the market are "auto-transformers" according to their internal construction, i don't know if the term "auto-transformers" is what you use in english. 

But i'm curious why another principle is better (especially for the amplifiers)? As the oppisite to auto-transformers there are different ones with "galvanic isolation". 

"Unlike the auto-transformer, the transformer provides galvanic isolation of the load circuit from the mains. The transformer acts as a filter for impulsive noise arising in the primary network."  

Personally i'd like my stepdown auto-transformers to be a bit quieter, but i think for a turntable stable vontage is much more important. I don't use any power conditioners in my system. 

@pbnaudio thanks Peter. BTW: how do you lubricate DP80 motor?

The bottom bearing "holding" plate comes off by removing 3 screws, so its pretty easy.

What lubricant do you suggest, Peter?