A Confession

[DaveWM]

Originally Posted by Hagstar

Well the tripler is putting out 3 times the input voltage, 4 times would be near 30K. I would assume they are designed the same but the quadrupler would have 2-3 extra stages. As for design they are doing what they were designed to do as far as I can see- replace flybacks by turning horz. output voltage into high voltage- weren't they used this way originally at factory?

John H.

I have only seen SS triplers used in SS circuits, so comparing the output of a SS horz transistor to the plate of a horz out seems like there could be some difference in the voltages applied to the tripler. On top of that I cant say for sure but I think they were attached to a winding on the fly back that was not at the same level as the horz out from the SS or tube if so used. So the fly could have been adding some beyond the horz out level.

Regardless IF you are maxed at 22.5v with no shunt current, and you are in the experimenting with using triplers to replace flybacks, then it would seem at least worthy of trying a quadrupler IF you want to get more HV. I suppose there maybe some other limits as to what you are getting out as far as power in/power out, but without trying I don't know if I would say it can't work. One last thing, 30kv is about where old flyback systems maxed out anyway, so if 4 times would be 30k you would be right on target for unregulated voltage.