Why does the VPI motor thump

My TT motor on/off switch has no capacitor and it never thumps.

Of course it's battery powered and not connected to the electrical system.

<:-)

...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?