2. analog
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SDS question

Hello friends,
I was checking my turntable speed today using my KAB speed strobe and found that my table was running quite slow. I had the VPI SDS calibrated at 59.85hz and I thought I had the speed perfect. Today, I needed to adjust it to 60.03hz to get it dead accurate again.
What might cause such a big change to have to be made? I was wondering if it might be the weather (it has turned cold recently here in Chicago)?
Any thoughts would be appreciated.
Thanks.
tfkaudio
jameswei
883 posts
 
Stringreen,

I would have to agree that "the brass piece" is the motor shaft, especially since you said Harry recommended putting oil on the shaft. I don't have a Scoutmaster, so I have only looked at web images of the motor, and they seem to support the brass piece being the shaft, too.

As Markd51 noted, one may need to remove the pulley by loosening an Allen Set Screw in order to get the oil to the shaft.
sberger
146 posts
 
That's exactly what I did. It's actually 3 set screws, 2 in the shaft, and, once the shaft is removed, a very small one to lift out the brass nut. I then dabbed a swab with motor oil and brushed. Not that simple, but there it is. I hadn't even given thought to doing this since I acquired the motor a couple of years ago, so it was certainly about time.
tfkaudio OP
591 posts
 
Thanks again to everybody. I had always wondered how to go about oiling the motor, since there is almost no space between the pulley shaft and the motor base. The VPI manual really should have explained it just like Sberger did!

Cheers.

Tom
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