Do equipment stands have an impact on electronics?

dlcockrum
431 posts
11-04-2016 11:33am
Hi Geoff,

It seems that many manufacturers of spring-type footers have a range of loads for each offering. I understand that matching the spring to the exact load is optimal, but is there not a range for each spring that would deliver significant gains?

I also specify a range of loads. It wouldn’t make sense otherwise. Since the resonant frequency is a square root function of load and spring rate the iso device is not terribly sensitive to load for a given spring rate; of course one can add mass to obtain the desired load in the case a component is a little lightweight for a given set of springs, no? For example, if one were to use a maple board the mass of the maple board would be added to the mass of the component to get the total load. I have some customers with VERY heavy turntables, you know, big VPIs, Verdiers and Ravens, and monster amps circa with VERY HEAVY marble slabs on my springs for the isolation. In such a case the mass of the large marble slab is quite significant when coming up with the number of springs required. Which reminds me: the number of springs is another variable, spring rate is not the only variable. There are many ways to skin a cat.

You got it. The spring loaded inner portion of my footers are the part that rotates. It provides the ability to level and provides stability compared to a spring alone.   I suspect this would help against those nasty p waves in particular should they ever beckon to keep the gear from rocking like a horse.   You rotate the inner portion to the height desired. These things work like a charm and would cost a fortune today. Who knew Radio Shack had it in them?

Because they move they will generate polarities of shear one of which is interference.  Tom

Geoff, don't be such a cynic.   You sound jealous!  Calm down.