[morzh]

Also as I found out, the bridge does not bring voltage high enough (well, I knew the formulae, but then with filter cap it depends on the load also).
The doubler works real well, plus, yes, it lets the negative wire through which makes it the common point.
And I like the fact that simply changing the caps ratio you can variate the voltage fairly widely.


Oh...and if you want that comtrolled rise, you then probably should make the tube D2 (the horizontal) diode.