Turntable hum??? Help

Just getting back into vinyl, and seem to be getting a hum that increases in volume as the passive preamp potentiometer is raised in volume. Played with ground wire from turntable to phono amp with no luck, and was trying to see if any of the tonearm wires were bad and can see nothing wrong or loose. Could it be the solid state phono stage and it's power supply? The table is a Well Tempered and the phono stage is the Gram Slee 2 SE. Any help would be appreciated!

Thanks!

R.