My phono cable from turntable to phono pre (Audio Sensibility impact SE) is different from the rest of my interconnects (Vintage Western Electric). My next cable upgrade will be to all Audio Sensibility cables through the system.
I didn’t want to touch the cables it just happened by accident and that is when I noticed the hum. The vintage western electric is a simple cloth sheathing however there is no noise when I use a different power cable and try the same experiment. Hence the question of the power cable being the cause of this and if that indicates a faulty cable. Hope this clarifies.
The cables touched near the center of their runs. It is a high current cable for use with amplifiers.