If you have been following my Garrett ATX rebuild thread at http://www.detectorprospector.com/forum/topic/462-garrett-atx-strip-down-rebuild/ you will have seen that I sacrificed a Minelab Commander 12' x 15" DD coil for the project.   So may as well get an education on what Minelab has in there! First the coil, then with top cut off. The inner portion is completely wrapped in conductive paper which creates the electrostatic shielding.     Tear that all off, and you see a foam oval. Flip