Many thanks for everyone's responses. The owner said the problem was static with a hum. I'm not sure if he is right. I suggested for him to assume the line from the house is okay and have the gate company just splice a new wire from the feed from the house to the control pad at the gate just to see if the problem is resolved. Sure enough, that fixed it. The little jumper is only 15 feet long, so somewhere between those points is the problem. Still not sure what it was.
Thanks to all,
Byron
