Hello,fellow users,
Some of you might remember a litlle setup I was building ( http://bit.ly/ekycq9 ).
Today I have a question concerning the turntable part of my setup.

Everything started when I wanted to give vinyl a try.After reading so many positive comments about it,I got a Technics SL-J1 to listen to my classics I have on my computers mostly in MP3,a bit in FLAC.Note that since I listen to a lot of things but mostly disco,funk,soul of pre-1985 a lot of my music was actually recorded to vinyl originally.

At first I had an old kenwood amp with a phono input that worked fine.A basic test gave me a reasonnable sound quality with records(using the SL-J1)
After a few months of not using it,I got a Behringer pre-amp and a Denon AVR-4xx receive and now I have a serious pitch problem.

You can get the original recording from my tt to my computer of one of my vinyl,saturday night fever,track 1(a fifth of bethoven by Walter Murphy) here: http://bit.ly/dXQ45A

Here is a slowed down version with an edited pitch to show the problem: http://bit.ly/fqtb38

In short,the pitch changes constantly during the reading.The needle seems stable,and I do not see any apparent problem.This is my very first turntable,but it looks like the speed is changing.Or maybe its the pre-amp?

Any help with this matter would be appreciated,thanks!


Video in use 1: http://bit.ly/dEqG82
Video in use 2: http://bit.ly/hjseK0

Pictures:
http://bit.ly/ezFCHJ
http://bit.ly/ealpJi
http://bit.ly/grGPZ1