I've opened it, and everything seemed normal (as far as I could see - the connections inside the arm bearing are impossible to see). When I try to wire the arm with the chassis, nothing changes.

As I could read on Graham Slee's site, there is a tag from my left channel ground connected to the chassis of the cartridge. According to Slee, it could give a hum loop when the arm is well earthed. I didn't remove the tag as it has always been there, probably since my grandpa bought it back in the seventies or sixties.

Please, help!

Thanks

• Graham Slee's site