Step-up transformer for Dynavector 17D3?

Anybody using a step-up transformer with their Dynavector Karat 17D3?

my system:
Rega P25 turntable w/ RB600 tonearm, with modifications
Dynavector Karat 17D3 cartridge
Heed Audio Quasar phono preamp
VTL TL2.5 preamp
McCormack DNA 0.5 SE
Paradigm Reference Studio 100 v.2 speakers
Gabriel Gold interconnects
Wireworld Equinox III++ speaker cable
XLO reference series type 10 power cable (on phono pre)
Purist Audio Design Dominus power cable (on preamp)
DCCA Reference Master power cable (on amp)