When you have these wow/flutters variations in your turntable is time to update some points in your system.
I also recommend you a tool similar to Dr Feickert platter speed program and Adjust+ LP to check changes on values.
I usually improve these values taking care a lot the belts. You should move your non direct drive turntable everyday to avoid any kind of belt deform.
You also need to re-oil your turntable bearing.
If yo have an AC motor you need a good frequency generator to control Hz fluctuations. If you have DC there is nothing to do.
Indeed you can buy an outer ring to improve the moment of inertia, trackability and effective platter mass.
All of these points are interesting if you are a vinyl lover
I also recommend you a tool similar to Dr Feickert platter speed program and Adjust+ LP to check changes on values.
I usually improve these values taking care a lot the belts. You should move your non direct drive turntable everyday to avoid any kind of belt deform.
You also need to re-oil your turntable bearing.
If yo have an AC motor you need a good frequency generator to control Hz fluctuations. If you have DC there is nothing to do.
Indeed you can buy an outer ring to improve the moment of inertia, trackability and effective platter mass.
All of these points are interesting if you are a vinyl lover