Ground Hum with Rega RP6, Exact and TT PSU.


Greetings.

Just purchased a Rega RP6, Exact, TTPSU and I am getting a HELL of a hum. I am using an Aragon 47K Phone pre amp. I unplugged the wall wart and the cable which goes from the table and it is still there. I seems to get worse when I turn it on and the tonearm gets close to the center of the arm spindle and it picks up a lot of motor noise. Just sold a 28 year old Linn Axis with a Signet Cartridge and never had this issue with just the normal hiss associated as you turn up the volume. It's not noticeable a lower volumes but it is there during quiet passages and it is extremely annoying. The table sounds way better but the noise is very intrusive and honestly I am disappointed after dropping almost $2000. Thanks in advance
pivetta

Showing 1 response by lwal22

Inside rega arms, at the back where the counterweight stub is threaded in, there is a ground wire attached to a tiny copper shim. The shim is held in place by tension in the deepest threads of the arm tube/stub connection. This wire comes lose and, bam, exactly the symptoms you're describing.  Tough to access and resolder but it will very likely save hours of searching for a source of hum.