There's a book written in the 90s by Dan Davidson, called Shape Power. It mostly seems like pseudoscience, but it reads like an hdr manual, complete with pyramids, witness stuff, flat coils, etc. In alternative science circles, apparently there was a hypothesis that elementary charged particles like electrons and protons are toroidal vortices, and it made me think of poo's device. Pulsing dc through the coil may be an attempt to create an artificial simulated charged particle on a large scale. It also occurred to me that we can't necessarily ignore the effects of the interaction of the original radio waves with the signal in the coil.