I am working on a new tube type cell. Instead of the typical tube in tube design mine will be a 3 tube design (a tube in a tube in a tube) What I am wanting to do is to make the center tube neg. and the inner and outer tubes positive. Clear as mud right!

Instead of the typical pwm I was wondering if its is possible to make a pwm with 2 outputs that switch back and forth with some sort of pot. to control the switching freq.. The 2 outputs are connected to the inner and outer positve tubes with the common neg. connected to the center tube.

I am thinking that the switching current should help to dislodge gas bubbles, keep amp draw down and help keep the cell cool.

Let me know what think!!