Seven 30cm x 20 pyramid ‘irradiators’, all facing inward in what I understand is a ‘B’ field. Crystals used are quartz, amazonite, local quartzite, amethyst, jasper, blue lace agate, tigers eye, tourmaline, moonstone. The cable is co-axe, and is raised due to the ground arcing when the tesla coil was attached (looked cool with these purple lines connecting things)