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September 27, 2021, 06:29:59 AM

Author Topic: Record slow down  (Read 664 times)

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Offline aragorn723

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Re: Record slow down
« Reply #15 on: September 14, 2021, 10:28:58 AM »
Yup.  Hopefully this will be a top notch part.  Apparently there's shipping delays now, ordered these parts back on the 8th.  Can't even get an update on where they are.

Dave

Offline aragorn723

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Re: Record slow down
« Reply #16 on: September 15, 2021, 03:51:29 PM »
Update-parts came in today.  No instructions included, but it was just a few screws to take out the old bearings. The new ones spin noticably better without the platter installed.  Listening to some vinyl now, and the speed variation is gone.  Seems to be more detail too.  Wasn't expecting that.

Dave

Offline Doc B.

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Re: Record slow down
« Reply #17 on: September 16, 2021, 08:54:41 AM »
Quote
Seems to be more detail too.  Wasn't expecting that.

Yup, better bearings with lower friction have that effect. It's the same with the ball bearings we provide in our tape path upgrade kits to replace the fixed guides in Technics and Otari tape decks. Resolution increases.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline aragorn723

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Re: Record slow down
« Reply #18 on: September 18, 2021, 12:17:04 PM »
What is happening here, is smoother platter rotation resulting in the stylus tracking better in the grooves and playing more detail?

Dave

Offline kgoss

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Re: Record slow down
« Reply #19 on: September 18, 2021, 04:38:29 PM »
With a turntable ideally the only vibration would be coming from the stylus in the groove. By eliminating the bad bearing you eliminated vibration that was competing with the groove modulation.   Vibration control and elimination is at the heart of turntable design.

Did they send you any lubricant with the new bearing?
Ken Goss

Offline aragorn723

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Re: Record slow down
« Reply #20 on: September 19, 2021, 05:49:51 AM »
there's no separate bottle of lubricant, they must have applied it before hand at the factory.

Dave

Offline Deluk

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Re: Record slow down
« Reply #21 on: September 19, 2021, 09:01:10 AM »
There are plenty of "exotic" oils available to suit this job but a couple of drops of Mobil1 0-10 sae will do the trick. There is bound to more than enough left in a used can at a local garage.

Online Chris H

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Re: Record slow down
« Reply #22 on: September 19, 2021, 09:37:53 PM »
Vibration control and elimination is at the heart of turntable design.

Title of a book co-written by the founder of Rega sums it up, "A Vibration Measuring Machine"