I moved my rig closer to my PC and as soon as I did I got a hum. Perplexed I thought my amp had problems so I plugged it in elsewhere w/ no hum.

Last night I was @ my PC w/ the monitor off playing my Tele once I turned on the monitor I got the hum. I could turn my back to the monitor and the hum would reduce. So you might want to check to see if your PC is making the interference.

good luck!