tt isolation help

Trip, The springs are McMaster-Carr P/N 96485K125. They are 1-15/16”D x 4”L and use .148” diameter wire ground flat at the ends. They compress 23.7lbs/inch, up to a total deflection of 2.88”. So a 50lb load compresses each spring about half way down and leaves .88” of unused travel before the spring binds. I use six of these underneath a heavy sandbox. The springs can be moved around to level the TT.

This reminds me that I have an old set of Audio Technica spring footers as well. They are better suited than the McMaster-Carr springs to being placed directly under a component. The MC springs work best when mass-loaded by placing a heavy plinth layer beneath the component and the springs. This ensures that the springs work at a very low frequency and do not ring.