@dramatictenor & @sleepwalker65- I don think there is any extra source causing the hum. When I had the Exact 2 Cartridge in the arm, I also had a power conditioner which was used for a projector and DVD player. It was one shelf below the turntable in my rack. When it was powered up, that cartridge humid even more. When we swapped cartridges, no hum at all any time powered up or not. At the end of the day, the seller & I got the issue rectified by changing the cartridge. There’s a ton of info about hum issues from the Rega’s and the Exact 2 Cartridge. There’s also another upgraded power supply which supposedly helps this problem. At this point, I’m going to stay right where I’m at. I’ll be totally honest, although I love the sound of vinyl, I’m still having a rough time with the snap crackle and pop associated with it. Even after washing the albums and with 34% RH in the home, still get them pops. It’s a very hard decision and it’s still up in the air, but vinyl for me may be short lived :(