Isolation platform for non suspended turntable?

I made a DIY sand box from 3/4 MDF with a seperate plinth for my turntable motor and table. If you have a friend with a shop you can make one for $75 or so. Mine holds about 75 lbs of sand and does and excellent job of eliminating vibration. I also have it on a beefy, DIY, cherry pillar, Birch, European pilewood, two shelve unit that is extremely stable, which looks fantastic. All of this rest on a cement floor with a pad and carpeting over it.

The actual cost is really much cheaper, mine cost around $25.00 or so.

You simply must try one of Geoff's Promethean Base isolation devices under your 'table. This thing works magic under my Spacedeck. It is on the order of a component upgrade. Seriously.

Oz

Is it the platform that your table is picture with, the one with the springs?

Adding a spring-type base, or one with rubber, or one with air bladders, is simply making your turntable a suspended turntable, instead of an unsuspended one.

If you want to make the most of your unsuspended turntable, then you should look at stands which are generally suited to unsuspended turntable use. These would generally be a high-mass rigid stand that is relatively low to the floor, but still high enough to be convenient for changing records.

Adding a suspension under a TT, has never had any attraction for me.