Change the capacitor across the on-off switch from the .001 microfarad installed to a .01 microfarad. That is also the recommendation from VPI. Worked great in my system, thump instantly gone, now I can turn it on/off at any volume. Just unscrew the trap door under the on/off switch, the capacitor is across the on/off switch with screw on insulated electrical connectors. I found it easier to take the platter off and then tilt the turntable on it's side on the carpet against the couch with the trap door at the top. I emailed VPI and they actually sent me the capacitor, but you can get it at any radio shack for less than a $.
Loud pop when I use the turntable on/off button
I hooked up a new Manley Chinook phono pre-amp yesterday and when I press the turntable's on/off button I am getting a loud pop sound.The unit seems to be working,I need help with the on/off problem.I never had this problem with the Belles 120A that the Chinook is replacing.Turntable is VPI Classic One with Lyra Delos cartridge.