DIY TT

I went a different route.  I used the motor housing, platter and bearing from a VPI TNT 4 and built my own plinth. I also used a 300 RPM Hurst motor and VPI's one speed pulley. Feet are also VPI for now .  The plinth is 21"x16" and 1 1/2" thick.

@pindac 

The plywood board has been replaced with a 1 3/4" maple platform spiked to the wall shelf.  It had some scraps around that just happened to fit, and was intended to be  temporary. 

The second piece of acrylic was also the temporary shelf material.  I have not decided what to replace it with  It is too thin to support the weight of the new wooden platform and the heavier plinth without bowing slightly.  But that's more of a practical issue than an isolation issue, I'm not having any issues at all with any structural vibrations reaching the plinth.

@pindac 

I have tried glass, marble, and granite in the past, but not with this plinth.  I have found MDF to be preferable to either of those materials as a base shelf material.  However, I don't have a suitable sized piece of MDF right now to use as a base shelf.

@mijostyn 

I don't need that kind of isolation.  No structure borne vibrations make it to the plinth.  The sub floor is a cement slab.  Springs of any sort do not provide any positive sonic benefit.  In any event, if I did need a suspension as you describe, I could always go back to my venerable Logic DM101 😀

@pindac 

I'm sure we would get along great.

I've found that the choice of materials is extremely dependent on the environment.  When my listening room was on a suspended floor, my old Logic DM101 (similar to Linn/AR/Ariston), but also similar to Sota (3 point suspension hung from springs) worked best at isolation when using either a low or high mass stand.  Where my tables are now, foot falls and structure borne vibration aren't much of an issue.  The platforms are more about preventing airborne vibration from reaching the platter and arm, and also about the ability to precisely level the plinth and platter.

@mijostyn

In the video, the turntable is on a floor stand. Mine is not. I do not have any vibration or rumble issues in my setup, Springs isolate in both directions, and while they may help in some situations, can also prevent passing higher frequency vibration from the platter/plinth back down to any platform or subchassis that a turntable might have.

If I recall correctly, which I may not have, you experience this as feedback some time ago and had to take other measures to mitigate it.

@mijostyn 

Battle?  I thought it was a discussion, an exchange of ideas and experiences.

I have the Sota Total Eclipse  package on my tnt, and it is a fine drive system. I may consider it for the DIY table.