Got a replacement 300mm coil from Mary at Whites and it kicks butt. My old super 12 was overloading a lot and got so it would over load at 2 RX. Called Whites talked with Mary ,she fixed me up a usual. Those are some great people. Makes ya wonder how they make money taking care of things with customer service the way they do. Thanks to all the great people at Whites Metal Detectors! Words dont say enough for there service. Yazoo