Hello all this is my first post here, and it's a request for help :-) my grandpa gave me his old Beogram 1800 (this one: http://213.206.141.235/prod_details.asp?pid=276 ) this Christmas. The problem is that the speed is changing (i think) and so the pitch is also varying, which is quite annoying. So the speed seems to be good for a while, then it