Why does the VPI motor thump

Why is it when I turn off my VPI motor I hear a thump through the loudspeakers? The only direct connection to the stereo is the belt.

last_lemming04-16-2014 5:38pm

elizabeth Details Discussions Posts This discussion Message User 6,726 posts 04-17-2014 at 05:26am Copy Comment URL Report Comment Edit Delete The thump is the collapse of the magnetic field. Some caps work better than others at killing it (basically slowing the collapse ofthe field down with the cap in there.) So even the same TT with the same supposed cap one might not thump and another one will. Cap have BIG variances. the 'good' one may be well over rating by 15%. the poor ones well under by 15% so that is a 30% variance. VPI folks may be annoyed at being asked to fix it. But they should do more to stop it. It is a FAULT, and not a normal TT feature..
elizabeth Details Discussions Posts This discussion Message User 6,726 posts 04-18-2014 at 07:55am Copy Comment URL Report Comment Edit Delete I have owned four turntables in the past six years. (I still have three of them. NONE of them ever makes/made ANY noise through the system when turning them off. Via many different phono boxes and configurations.. So I have to say 'muting' the preamp is for crap which behaves badly. And NOT a standard practice.