@Sebosfato
Thank you for welcome me.
The picture is named "nuova cella" at page 11 ..and my You Tube channel is "kenterprise1". Can't offer a link, I can't access YT from China, where I'm now.
I was looking "around" among the ozone generator producers and I found at least one who build a system - water cooled ozone generator - that could be easy converted into a HHO generator as Tutanka proposed. It have a inner enamel coated SS electrode, a outer SS electrode and inside a SS sintered third electrode can be fixed and grounded.
I add the PDF file with a system commercial description I get it from factory.
In any case a ground in the " water body" is a must to create real gas..I did it on my ( silly) experiments by simply short-cutting the circuit.
On his tubes Meyer have some slices ...it could be used to increase the exposed surface of ionized water to a - missing- third electrode as ground connection? Is an idea only, I never study Meyer's systems - too complicated...
As I said I bust the fuses since I had 220 V AV/ 50 Hz variac as power source but - visually -gas production exceed anything I had before. A step-up transformer at higher frequency PWM ( or AC) may solve the problem.
I 'walk" more on Dingel way, due similarity: low technical expertise and equipment!

and maybe I should post there from now.
I just saw that picture and replied to clarify some things.