2. analog
  3. 183763-1294

Meandering Pitch, Where’s The Problem?

As I’ve mentioned in other posts, I’ve been modifying a Thorens TD 160 MK1. It is and will remain a dedicated mono table. Currently, I’m using the original TP 16 MK1 tonearm with an AT 33 mono cartridge. I will eventually replace the TP 16 with an Origin Live tonearm and EMT mono cartridge. I still however like playing records while in it’s current state. What I’ve experienced with a number of classical records is pitch instability. Primarily when playing piano recordings. There are certain passages that are a problem and I’m not exactly sure the cause. My cartridge is aligned using Baerwald. I understand that with some records, especially very old mono vinyl, that the pressings could be off but if that were the case, then the entire album would be an issue. I do need a new belt but I’ve still had this issue with a brand new Thorens or Origin Live belt. Just wondering what others think and if there’s an antidote? Thanks!

goofyfoot

Showing 1 response by clearthinker

clearthinker's avatar
clearthinker
1,582 posts
 

Hey everybody, let's get clear about off-centre spindle holes.  Do you have speed instability on EVERY record?  if so, it can't be off-centre records - they can't all be off-centre.  Anyway, you can see an off-centre record when it's in play - the arm swings a little left and right.

So if you have the problem on all or most records; some you will hear more than others - eg piano, as above - then it's your turntable.  Posts above rightly say change the belt, check the motor.  Also take off the platter, flush out the bearing pit , clean the spindle and add new correct oil per maker's instructions.

It's nothing to do with cartridge set-up - if that's wrong, you will hear other faults.

More to discover