Platter wobble


I have a Technics SL-BD20D and the platter has a noticeable wobble while spinning. ive tried a couple mats - cork and acrylic - which made the wobble much more apparent.  The rigid acrylic platter would not lay flat on the platter. 

Anything I can do? Is there a way to test what the issue is?  Is there an quality aftermarket platter that I can use?

Thanks!
leemaze

Showing 3 responses by geoffkait

The way I figure it since many LPs are not flat it will all average out. 
So, what material is the platter? At one point you said acrylic but that was probably a typo. Maybe time to upgrade the TT.
Does the platter lay flat on a table? If so the problem is probably elsewhere. One thing that might work, if the acrylic platter is warped, is placing the platter between two sheets of glass and weighting the top sheet of glass with 5-10 lb. weight. Place the “platter sandwich” in oven at 150-200 degrees for 10 minutes. See if that works. If not, replace the platter. Maybe the platter is still on warranty.