DIY TT

Looks like the study of the Vintage Models has brought the 'Trekkie' fan out as well 😀 

Townshend Audio offered their damping trough separately in the late-80's/early-90's. I've never seen one for sale used, but one could be taken off a "sacrificial" Townshend Rock table and used on any other design. The cheapest Rock to find used is the Mk.3.

Not a Trekkie, but more of a techie maybe?

 

@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.

@vinylzone Thank You for the information and the knowledge of your exchanging the Plywood Board to the Substantial Piece of Maple Wood.

If a an additional piece of Acrylic is available of a suitable dimension, a option will be to consider a CLD Layer at this position in the structure, the doubling of the thickness will improve the structural property and it should be able to take the added weight of the Maple.

Acrylic in 8mm thickness has measured very favourably for damping and dissipation when assessed as Plinth Material, I am awaiting to see further measurements when it is used with a 0.8mm thick, double sided Teflon Tape.

As a First Tier in a Sub Plinth, the CLD design could prove to be quite a valuable choice.

 I use Cork Footers under a 30mm Thick Granite as my first Tier, and have one other not so commonly used material as a Tier sandwiched between Granite and Plinth with Two different design footers separating the sandwiched Tier.

@holmz The additional information and the variety of thoughts offered  from different end users, is always a welcome way to extend ones understanding and knowledge of products used. 

Being too insular in my experience is not going to bring inspiring discoveries.