The important details of the experiments performed are shown in Table 1. Experimental details were selected to provide statistically significant data. The largest gap length was based on the physical dimensions of the setup, surrounding walls and rating of the voltage equipment. The power supply for the experiments is shown schematically in Figure 4. An electronic signal synthesizer (A), was used to supply a sine wave to the amplifier (B). The amplified signal was then fed into the resonant tank circuit composed of the tuned inductor (C) and the capacitor stack