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Reduce audible hum Pro-ject RM-5

I have just upgraded my system, being on a budget I have the following now.
Turntable Pro-ject RM-5
Phono pre amp Pro-ject tube box SE II
Pro-ject speed box
Goldring 1042 cartridge
Audio quest copperhead cables
Valve Audio exclame' 100 integ amp
VMPI RM2 speakers

Here is the problem. I notice a hum musically at about low A when listening at pretty high volume only occurs when the stylus in on the vinyl. It does not sound like rumble as it is very constant. Interferes with quieter passages of music.
Recommendations???
oceanica1

Showing 1 response by newbee

newbee
4,794 posts
 
Probably hum caused by your cartridge and or TT motor is not shielded. Quite often it appears as the cartridge approached the motor. In running a Grado on a favorite TT at the begining the hum was not present, but on the last 1/3d of the LP the hum started. There was no problem with some other cartridges. On another TT the Grado was/is very quiet. I think it takes two to tango.

Alternatively, are your TT and IC's isolated from other components, especially those with transformers. This can be a big problem as well.
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