Yea, i'd be interested in it too, i posted a video in another thread, where a guy was pulsing a coil next to 3 magnets, and when he pulsed the coil at 7.8 Hz the magnets went crazy, if you designed something around that idea, with some pickup coils to collect the energy when the magnets interact with the earths magnetic field.... i think it would be worth trying, could even give you COP > 1
Maybe for fun, i will order 2 inductors......
See if i can pickup some waves / voltage...