Support table or shelf for turntable

A spring suspended platform isn't cumbersome at all if made well. Check out my system page. I think my platform looks rather nice. Even on a shelf on a concrete wall, there are seismic and airborne vibrations.

Todd, looks good. Does the table not roll away?! Might be more of a challenge with my 60 pound turntable!

noromance,
I love your Eico monoblocks! I just gave my daughter my Eico ST-40 integrated. However, not original so heavily modified.

Anyway, I'm moving towards the decoupling approach for my gear as mentioned by geoffkait and others. I've had tremendous success using decoupling springs with my subs to solve mechanical feedback issues through my turntable.
Kenny

@noromance ha! Yeah, the wooden balls are a little misleading. I sanded divots in the platform to keep them in place and they have some Teflon tubing inserted into a hole in the top that goes into the bottom of my TT plinth to keep everything stationary and still allow a bit of wiggle. I mostly did that because I removed the power supply and motor from the plinth and mounted them on a wood and granite mount I made. That necessitates keeping the plinth and motor mount in the same place relative to one another. For your use, you could just make an isolation platform and plop your TT on top, done and done!

Very often, the table reacts not to the up/down movement of the floor, but to its horiontal - left/right movement.  You can eliminate this by placing a piece of appropriate size wood to affix the table to the wall behind it.  You'd be surprised at how helpful this can be.