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Old 21st June 2010, 02:32 PM   #21
SY is offline SY  United States
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Originally Posted by Conrad Hoffman View Post
I've always thought a path to ground is a good idea.
Why? It isn't like the top (friction) surface of the record is grounded. And most platters don't have conductive surfaces, either.
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Old 21st June 2010, 04:20 PM   #22
jlsem is offline jlsem  United States
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Correct me if I'm wrong, but on some of the Technics direct drive turntables the mat is a conductive rubber compound. And most of my friends (who have much better resources than myself) use Micro Seiki Cu180 copper mats on their SP-10 MkIIIs and swear by them. The static discharge wire from the headshell to ground is more often than not a pig in a poke. Of course they all have metal bearings so it may be a moot point.

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Old 21st June 2010, 05:01 PM   #23
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Well, even for a metal platter, the vinyl record itself is an insulator.
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Old 21st June 2010, 05:04 PM   #24
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Well, even for a metal platter, the vinyl record itself is an insulator.
What if the records gone gold or platinum?
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Old 21st June 2010, 05:51 PM   #25
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What if the records gone gold or platinum?
Then it's not vinyl anymore.
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Old 21st June 2010, 07:55 PM   #26
stevieg is offline stevieg  United Kingdom
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What force makes the platter mat stick to the record? If not static electricity?
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Old 21st June 2010, 09:20 PM   #27
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Sometimes static, more often plain old London forces.
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Old 22nd June 2010, 06:41 AM   #28
stevieg is offline stevieg  United Kingdom
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Would there be a difference in the noise made when peeling the felt mat away from the vinyl which could help me distinguish between static electricity and London forces?
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Old 22nd June 2010, 07:09 AM   #29
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Sounds like a losing battle here Sy. There's good evidence to show static build up on records either due to the belt drives acting like VDG's or through static build up from spinning in dry air.

If the vinyl is acting as an insulator and holding charge then surely all that needs to happen is for it to touch something grounded to earth- like the bearing spindle.
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Old 22nd June 2010, 09:26 AM   #30
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If the vinyl is acting as an insulator and holding charge then surely all that needs to happen is for it to touch something grounded to earth- like the bearing spindle.
That doesn't make sense to me. If the spindle is conductive, the only part of the vinyl that touches it is the center hole. Since the vinyl is nonconductive (i.e., near zero charge mobility), how would the charges from the rest of the vinyl get to the ground? Has someone actually published any evidence that static buildup is reduced when the spindle is grounded?
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