Why does the VPI motor thump

...just thinking....maybe because my system is totally balanced may have something to do with the silence of switching off my VPI

In my earlier post I incorrectly said I spoke with Matt, it was in fact Mike. Here is his response regarding the cap value he recommends.

"We use a .001 microfarad capacitor across the on-off switch because it usually works with most components to eliminate the pop, you can change that to a .01 microfarad cap and that usually helps or eliminates it with some of the other components available."

This is the reply I received from Mike at VPI in 2010 after I had this problem with my Classic 1. It completely fixed my thump.

VPI Customer Service
11/26/10

The pop is system dependent and since we have no idea what a customer has we install the cap that works 80% of the time. You need to change the on-off bypass cap to a .01 microfarad 400V non polarized cap. We usually install a .001.

Mike

I mute my phono pre before turning on the TT, so I have no idea if my TT would "thump" if my phono pre was not muted.

More importantly, ... I have no intention of "testing" my set up to see what would happen if I didn't mute the phono pre. Why would I want to take a chance of damaging a speaker or downstream component because of a TT thump or transient or accidental tone arm drop??

So what if the TT thumps when switched on. What's the issue?? Who cares? Why is this even a question?

People care because it's annoying