I have a question about a antenna i installed it's a terk slimline outdoor antenna.My channnels come in very well, but i have a problem when vehicles drive by my house it messes with the picture.My house is about 30 feet from the road and i have to have mounted on the front of the house facing the road in the direction of my towers.Do i need a amplifier or is there another way to fix this problem. Sometimes i get a alot of traffic and this can be a annoying problem. Any help would be great thanks!!!!!