So far, no one managed to increase the voltage at the cell without increasing the current. The cell is a resistor, more voltage = more amps. Its not about physics or theory, its about engineering to build a circuit capable to do this... And coating at the tubes does not work... The whole purpose of this is use water as dielectric and charge it with high voltage. If you coat the tubes you are not going to charge the water, you are going to charge this white coating, destroying all the purpose of stans work.