Scott...thanks for the update. I was pretty sure it didn't have anything to do with the power supply.
If you have to dress the cable just right in the retainer clip to keep it from humming, then there has to be a break somewhere in the cable. Either in the cable jacket or at the point where the cable enters the tonearm itself.
It seems you have it solved for now, but it really should be fixed permanently. I would take the arm off and send it back to The Sound Organization, (the Rega importer here in the states) and have them fix it or replace it. Is it still under warranty?
This will probably just continue to get worse until you fix it for good.
If you have to dress the cable just right in the retainer clip to keep it from humming, then there has to be a break somewhere in the cable. Either in the cable jacket or at the point where the cable enters the tonearm itself.
It seems you have it solved for now, but it really should be fixed permanently. I would take the arm off and send it back to The Sound Organization, (the Rega importer here in the states) and have them fix it or replace it. Is it still under warranty?
This will probably just continue to get worse until you fix it for good.