but, i was taught that when you de-tune a radio, the stitac you hear is actually radio frequencies so ? i also saw a video on youtube where a man uses 3 coils in the same´╗┐ way you use one, but he tunes them all to the same frequency. i mean, the natural resonant frequency or something like that, and he was (claiming) to draw energy from the background radio waves that are all around us. what do you think about that? possible? or maybe connect multiple coils in series??