HK T-60

spray deoxit onto pitch control and jerk it back and fourth. if it doesn't help, do that under chassis.

How old is the belt?

I think you have good advice from above. If you are interested in the T-60 historically, you might want to keep it. I don't think it would be exagerating to say it was famous for filling a gap between the lower end and the top turntables. With the Ito tone arm, suspended platter, and heavy base, several times its price was required to exceed it sonicly, and it caught the attention of The Absolute Sound which gave it a good review.

I used to own a T60 and I remember reading about speed control issues (mine did not have them). What I remember is that owners changed out all of the caps and cleaned the pots and this resolved the issues. I can't remember which site, but it may have been Audiokarma.com. I hope this helps.