Record slow down

A

aragorn723

New member
Today I was listening to some records and noticed that they are slowing down.  The record player is a Uturn Orbit, and is 3 years old.  Is fixing this as simple as replacing the belt?

Dave
 
Was hoping someone could help on here.  I did send a note to Uturn but probably won't hear anything till Tuesday with the holiday coming.  Curious about your question though Paul, seems to imply it might not be the belt.  You would think belt tension is constant throughout the whole record.

Dave
 
Have you got a little strobe plate you can drop on the spindle? Useful to have far a $ or 2. You can then check the speed at any point on a record.
How is the bias set on your arm. String and weight? Magnetic? Might be a problem there.
 
Never heard of a strobe plate, is there one you recommend?

As far as the cart, I followed their directions.  Mounted the cart, hooked up the wires, then checked the alignment.  After that, I set the tracking force to 1.75g iirc.  Afaik there is no separate bias setting on the Uturn.

Dave
 
That must be very bad QC by Orbit unless there has never been any oil in the bearing. They normally last "forever" in normal use. I'd be politely asking them for a free replacement.
 
I agree with DELUK. That is appalling... This is a turntable manufacturer and they send out product with bad bearing and spindle...  :(
 
Can't complain too much really, they charged me $10 for a new spindle and the main bearing since the table just went out of warranty.  Agreed though, probably was defective from the start.  My bicycle bearings last longer than that and have thousands of miles on them.  The Uturn has about 400 hours of use.

Dave
 
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
 
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
 
Seems to be more detail too.  Wasn't expecting that.
Click to expand...

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.
 
What is happening here, is smoother platter rotation resulting in the stylus tracking better in the grooves and playing more detail?

Dave
 
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?
 
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