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Technics SP-10mk2 oscillations

A peculiar thing going on with my SP-10mk2. Without the platter, the rotor oscillates  at high frequency and amplitude while turning at 33rpm. At 78rpm, the oscillations are much less so. With the heavy platter on, oscillations disappear. No gridding noises, etc. Anyone experienced a similar issue or can share any helpful tips? Thanks in advance.

Ray

 

rays19
totem395
390 posts
 

Some manufactures state,

"damage may occur if running with plater removed"

 

czarivey
5,781 posts
 

That's exactly how people get nice vintage piece to turn it to junk quick.

rays19 OP
9 posts
 

Thank you @best-groove, @lewn, @atmasphere for the insightful comments, really appreciate it.

lewm
12,625 posts
 

Rays, you’re not the first guy to make this mistake, so don’t feel bad about it. I hope your SP10 was not damaged. Most likely it was not if you ran it only briefly sans platter.

rays19 OP
9 posts
 

@lewm, the SP10 is fine! I'm relieved that it wasn't anything wrong with my motor as I initially thought. Thanks again!

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