the schumann resonance is perfect but what will you do when you are not around the Earth? all planetary bodies resonate at different frequencies. the perfect power source works anywhere.
just something I wanted you to think about.

still not a perfect energy source because when you use energy from the earth it slows down earth's rotation just a tad. at so,e point earth will lose all its spin or most of it and sit around like its sister venus.

from our good old friend wiki.

In the normal mode descriptions of Schumann resonances, the fundamental mode is a standing wave in the Earth–ionosphere cavity with a wavelength equal to the circumference of the Earth. This lowest-frequency (and highest-intensity) mode of the Schumann resonance occurs at a frequency of approximately 7.86 Hz, but this frequency can vary slightly from a variety of factors, such as solar-induced perturbations to the ionosphere, which comprises the upper wall of the closed cavity.[citation needed] The higher resonance modes are spaced at approximately 6.5 Hz intervals,[citation needed] a characteristic attributed to the atmosphere's spherical geometry. The peaks exhibit a spectral width of approximately 20% on account of the damping of the respective modes in the dissipative cavity. The eighth overtone lies at approximately 59.9 Hz.

Jerry

I have never tried this set up. Years ago , I was into Amateur Radio. One day there were thunderstorms in the area. I had a wire aerial about 20 metres long. I connected a spark plug between the aerial and earth . For about 10 minutes , I had a more or less continuous spark . If you try this circuit, adjust the gap of the spark gap to be as small as possible without touching .

Hey folks, I translated a rough translation of Calculo using Google translator.  Anyone able to take a look at it and see if it makes sense?  I am not the greatest at understanding these things.  (new to this forum too, so bear with me)  Thanks,

Brian

Tesla_2006:
Hi, there is a web site show an antenna can get up to 5 KW power levels or any more power from Ionosphere

 http://radiantenergy.tk

       Don't bother with this site.   GOOGLizing the address as "radiantenergy.tk' gives an error that it's unavailble because of something called 'robots.txt'.
 
 
You might make a note to yourselves to ignore this.
 
--Lee