When I bought my present house three years ago, there was an omnidirectional tv antenna mounted on a mast beside the house. The wires had been cut to it. I have satellite service so I haven't used the antenna, but I am considering using it. I took it down to inspect it. It is round, about 20 inches in diameter or slightly more. All the labels have worn away. It has a short piece of coax that has been cut off. It also has a short piece of what looks like telephone wire. It is three wires, one black, one white, and one yellow. Does anyone know anything about these and can you tell me what the other wires are for.