Brilliant... and you beat me to the punch on this. In England, I worked with two other guys and we managed HHO production with custom tuned cavities on 12v and 400ma which was sufficient to run a 6cyl Rover (car) on pure water. The cell was so efficient, that it would produce enough gas to launch several dozen HHO-powered bottle rockets on a sincle set of D-batteries. Keep up the good work! (and send me a tube or two to play with and I'll send you a really good 12v Multifrequency PWM circuit)