If the source of wow is the belt, how does it sound like? My BC9000 has the issue, I can't seem to find the thing causing it... It is altering speed (up and down) about 3-4 times a second, it sounds like a subtle vibrato. The deviation is not that great, it is not over 5% I think.
Beocenter 9300, Beogam CD50, Beocord 5500, Beomaster 3400, Beomaster 4400, 2 Beogram 4000, Beomaster 8000, 2 beogram 8002, Beovox S-75, Beovox MS150.2, Beovox RL6000, Beovox S-35, Beomaster 6000, 2 Beocord 9000, Beocord 8004, Beocord 5000, Form 1, 2x Beolink 1000, Beo4, MX3500, LS4500. Born 1993.