Thanks to both of your for your responses. I'm confident in the belt size, but I will try your method of letting the platter spin freely, to see if it stops in the same spot each time. There are some caps in the motor control circuit which I did not replace. That may be my next step. Again, thanks for the tips... very helpful.
Rotel Turntable speed
I purchased a Rotel RP-2500 turntable used and it won't keep a constant speed. I've searched the web and tried all the suggestions I could find. New belt, cleaned pots, greased spindle, and replaced (what I assume to be) the DC filter capacitor. The fluctuation in speed seems to follow a pattern (if that makes sense) - as if it slows down and speeds up at the same platter orientations each revolution. Could the platter be bent? I don't know if it's an electrical or mechanical problem at this point. Any clue if that motor can be substituted? Any other suggestions before I get rid of it? It's a good table otherwise...
Thanks