OK I did some testing last night. Zaik's theory that static builds up simply via platter rotation turns out to be correct in my case - after a 20 minute spin without the stylus engaged I still get that static cling. I then neutralized with Zerostat & per my wife's suggestion I applied Endust for Electronics (an antistatic cleaner/spray) to the platter top & sides with a lint-free paper towel. After another 20 minute spin, the static was back again although the charge was not as strong as before, so at least that helps.
Measuring the spindle-to-ground resistance I get an infinite reading, so I'm going to run a separate ground wire from the bearing-carrier back to the phono stage ground. This may help despite the use of insulating mat; the spindle contacts the record's center hole tightly enough that this could theoretically do some good. Then again this grounding didn't help Mot's problem, but I'll try it anyway & cross my fingers.
Herman's suggestion regarding the static drain-brush is certainly worth trying as well; nice idea.
Zaik I must agree the cover-issue is certainly problematic; this VPI is a suspended table with the cover hinges fastened to the base which is spring-isolated from the deck, so may or may not be an issue. I'll have to experiment with sonic comparisons of cover-open, cover-removed, & cover-damped per your suggestion.
Thanks to everyone for chiming-in here with their theories & suggestions; much appreciated.
Measuring the spindle-to-ground resistance I get an infinite reading, so I'm going to run a separate ground wire from the bearing-carrier back to the phono stage ground. This may help despite the use of insulating mat; the spindle contacts the record's center hole tightly enough that this could theoretically do some good. Then again this grounding didn't help Mot's problem, but I'll try it anyway & cross my fingers.
Herman's suggestion regarding the static drain-brush is certainly worth trying as well; nice idea.
Zaik I must agree the cover-issue is certainly problematic; this VPI is a suspended table with the cover hinges fastened to the base which is spring-isolated from the deck, so may or may not be an issue. I'll have to experiment with sonic comparisons of cover-open, cover-removed, & cover-damped per your suggestion.
Thanks to everyone for chiming-in here with their theories & suggestions; much appreciated.