Morte615
Active Member
I have an installation that over the last few years were picking up an AM radio station through the system anytime they plugged something into the floor pockets on the stage. This year they redid all the jacks and wires under the stage and included shielded XLR wire for the connections. Just last night though I heard the return of the radio station, it only happened when I had a 50' XLR cable plugged into a direct box on one end and the center stage floor pocket on the other (there are 3 floor pockets on the stage and 2 power pockets, in either of the other pockets nothing happened.)
If I unplugged the direct box the station went away, I was told that this used to happen all the time when they plugged a keyboard in to the stage pockets also.
So any suggestions on ways to get rid of this? An idea floating around here is to connect the shield on the cable to earth ground but I am worried it may introduce a ground loop then (and we already have enough problems with that as it is.)
If I unplugged the direct box the station went away, I was told that this used to happen all the time when they plugged a keyboard in to the stage pockets also.
So any suggestions on ways to get rid of this? An idea floating around here is to connect the shield on the cable to earth ground but I am worried it may introduce a ground loop then (and we already have enough problems with that as it is.)