[sdiy] Variable Voltage Regulator as replacement?

[Seb Carr]

> 
>     I have also used zener diodes in the ground leg.  Like if I need a 10 volt
> regulator, you put a 5 volt zener in the ground leg of a 5 volt regulator.
>
>
>
Up to what point does this work e.g. could i put a 43.0v zener in the ground
leg of a 5v regulator to get a 48v supply for phantom power, or is this
taking things way too far?

Thanks

Seb Carr