In fact, the circuit from post #10 is the only one that's working as shown, all others are at least missing capacitors. Is it so difficult to draw the schematics completely?
Circuit #10, is basically a modfied standard center tapped transformer dual supply circuit. If most of the power goes to the lower output voltage and only a small amount to the other, the transformer efficiency can be increased by using a bridge rectifier for the low voltage and a doubler circuit for the high voltage.