Stuff:\rbr-neodymium ball 13mm\rbr-Rodin interferencje coil, torus outer diameter 134,59mm, inner diameter 42mm, wire diamater 0,55mm\rbr-DDS signal generator 0-5Mhz, stability ± 1 × 10-6, accuracy ± 5 × 10-6\rbr-amplifier Crounh ONE 600W, here used just one channel at minimum amplification\rbr-power supply for amplifier - PC PSU Seasonic 750W