Tube Audio Design (Paul Grzybek) Tadac dac question

Does anyone out there know the DC voltage requirement for the late Paul Grzybek's Tadac tube dac? I own one and want to add a linear power suppy. 
According to the online specs, this DAC has a torroidal transformer and solid state regulation.

Why do you need a LPS?

Because the outboard power supply is a switching wall wart. 
It's the prototype. Ugly as sin but sweet sound. The same except it uses an outboard power supply.
Most wall warts are marked with their voltage output and whether they output AC or DC, but if not it could be easily measured with a basic meter.

Right. Except the wart go lost in a move.