Support table or shelf for turntable

Since your table is obviously not subject to footfalls. I suggest you might want to consider what I have done, which is to use a Brightstar Audio isolation platform, which is basically a sandbox. I believe that may really help in your situation.

I also use a Target wall mount platform for isolation from the floor to support my Garrard 401, which has a heavy plinth of MDF, and is clad in solid Purpleheart, the face being 1" thick, side and top panels between 5/16" and 1/2" thick, and is coupled to the Brightstar with Edensound Bear Paws, which are 3" X 3" solid brass footers, and weigh 6 lbs. each.

This has worked well for me. This may have been mentioned in this thread already, but adding dampening (weight) to your support table may also help. 

Best of luck, regards,
Dan

No idea what your current table looks like, but just remember everything can pick up vibration, though the table and shelf you posted (particularly the table) don't seem to have many large surfaces to pick vibrations up, other than their 'work' surface. So they're probably better than what you've now, but no garauntee they'll not have any other issues

@slaw , @toddverrone,  you can see my table in systems. ( no one seems to loom there)
https://systems.audiogon.com/systems/1593

@islandmandan Thanks Dan. I’ll look into your suggestion. Although, with the new slate, when it arrives in a few weeks, I was hoping for something less massive and "constructed"... trying to keep it simple. Taut and rigid. The good news is that I have procured an Audio Grail 401 for the slate plinth.

Took a quick look, I find it fascinating that since you feel the oak is causing the "pick up" of vibrations that you use marble slabs under your TT footers?

In my experience this is a double negative. Marble adds mass but acts as a microphone.

What material isolates the oak shelf from the rack? What are you using as the rack legs interface to floor?