I have a slight twist on the OP's question, in that I have a 70's era Thorens 145 belt-drive turntable that I have introduced a center weight to. As was pointed out, this weight does not affect the platter speed at all, it just takes a slight moment longer to come up to speed, so, no issues there.
However, on these Thorens tables the center spindle is not overly long, so, with anything at all other than the original rubber mat (which is quite thin) elevates the record to the point where there is hardly enough spindle to engage the hole in the middle of the weight (the weight I have also has a slight taper on the underside I suppose to help someone guide it onto a spindle).
I try to get it centered which helps most of the time but there are times when the weight is rotating a bit off-center. It does not affect the sound at all, but, just curious if there is any other thing it might be doing?
Also, some may be worried about VTA, but, we are talking a slight slight elevation here, not enough to change the VTA requirement. Even with the factory mat on the table the spindle barely clears the center piece on that table (which is also the 45 adapter if turned over).
Thanks for any thoughts or comments.
However, on these Thorens tables the center spindle is not overly long, so, with anything at all other than the original rubber mat (which is quite thin) elevates the record to the point where there is hardly enough spindle to engage the hole in the middle of the weight (the weight I have also has a slight taper on the underside I suppose to help someone guide it onto a spindle).
I try to get it centered which helps most of the time but there are times when the weight is rotating a bit off-center. It does not affect the sound at all, but, just curious if there is any other thing it might be doing?
Also, some may be worried about VTA, but, we are talking a slight slight elevation here, not enough to change the VTA requirement. Even with the factory mat on the table the spindle barely clears the center piece on that table (which is also the 45 adapter if turned over).
Thanks for any thoughts or comments.