I use a passport 8500 non x-50 s7 antenna as a back up detector. However, recently it has been falsing to KA band almost every trip in the car. No there are no devices in the car itself nor is it police. So my question is what should I do with it. I called Escort and they wanted $80 to repair it. I do not think it is worth much more than the cost of fixing.... Any ideas?