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Phono Hum w/ Pro-Ject Debut III

I am experiencing phono hum with my Debut III. Phono leads are going into my phono inputs in my Sunfire Theater Grand II. I think I am getting AC feedback from cable routing in the back of the system. The ground wire is connected from the TT to the Sunfire. I started moving the phono leads away from the AC lines and the hum has lessened but it is still there. Is there a good way (material) to shield the phono leads without changing out the leads themselves?
epeabs
epeabs OP
13 posts
 
As far as the cartridge, it is a brand new Ortofon 2M Blue. The hum was present with the old Ortofon OM-5E as well.
sbrownnw
700 posts
 
What interconnects? Did you try some shielded ones?
epeabs OP
13 posts
 
The interconnects are the stock ones that are pre-mounted from the factory on the Debut III. I didn't know if there was a way I could "shield" them myself? without having to install or solder better ones in myself.
epeabs OP
13 posts
 
I just borrowed a Cambridge Audio P640 phono pre amp and I still had hum. I was hoping to rule out that my Sunfire phono pre was the issue. I do notice that when I firmly grasp my phono leads out of the TT, I get an even louder hum. Maybe just crappy leads from the TT?
andyprice44
133 posts
 
This may help and it might not but, worth a shot. I have heard that many cable companies use a PTFE shielding in the cable itself. This can be also found as teflon tape or plumbers thread tape. It is white PTFE tape. I used this to shield a cable I was having hum problems with and it helped it significantly. Give it a shot. Teflon tape can be found at any hardware store for cheap.

Andy
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