Isolation platform for non suspended turntable?

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.

I would tend to agree. That is why I have my Well Tempered on a two shelf, solid cherry post stand (My design) that is spiked. It also rests on a (DIY) 75lb sand box that has a separate plinth for the motor.

However, if Ozzy62 says this spring suspension has improved the sound of his table I won't disagree with him. The proof is in the pudding!