ZPEnergy.com - Are concentric capacitors capable of overunity?

Due to Dr Harold Aspden's lectures and essays he claims that concentric capacitors are capable of overunity. In his theories about the vacuum energy he discribes what the aether really is.
It is a crystalline structure of cold plasma (ions) that covers all of universe. The explanation feels pleasant though it gives a deacent possibility for EM waves to work in the vacuum.

If the vacuum were a nothing, there would not be possible to spread waves of any sort.
Waves craves a media. Consider a star 20 light years from us, what amount of photons would it have to produce to fill a sphere of 40 light years from us. Continously for billions of years. I dont believe that is possible without burning out before that. With a media there would be different.
The photons dont have to transport all the way. Just push charges to eachother.

In this theory he tells that the ions can be made to follow the charges spinning in a circle and by that achive inertia. In a concentric capacitor such as a Leyden jar there would be possible to charge the capacitor and get almost the twice back when dishcarging.
Dr Aspden gives a possible way to tap the aether energy, and there are also examples of inventions that might have used this phenomena before. Such as Daniel McFarland Cook of Mansfield Ohio 1871, Dr Henry Moray 1925 and The Testa-Distatica machine from Switzerland.

I went curious about the phenomena and made a simple test. I made a capacitor from a 20mm PVC tube, winded with alu.foil and LDPE plastic as dielectricum.
The capacitor were coupled into a OP-amp. RC oscillator, and was compared with a ceramic capacitor of the same value. ( about 1.9 nF)
However I did not see any difference in behavior between the two types.
A question is: Is it necessarly to apploy high voltage such as Tesla-values to see the phenomena or does it behave the same for any voltage. I used 24v.

Is there anyone who reads this that have experience in this topic or have any aspect of Dr Aspdens capacitor theory, there would be fine to hear of that.