Interference to commercial and MOD services
These devices radiate high power RF signal that interfere with service and will likely end up with be being prosecuted resulting in a criminal record , a large fine, and exceptionally a prison term. These devices can be made in crystal controlled at 13.56MHz or 27.12MHz the 13.56MHz is a practical choice for resonance tesla coils, though the design is a little more complex. Please don't use these devices you WILL get into trouble, Don't ask how I know.