High voltage high frequency transformer

A shielded transformer winding assembly comprising:

• a first winding formed on a first printed circuit board, the first printed circuit board including at least two first board alignment elements formed therein;
• a casing including an inner portion and two tabs that extend outwardly from the inner portion, wherein the tabs are arranged to form a notch between the two tabs;
• and
• a lower winding spacer disposed in one of the tabs and supported by the casing, the lower winding spacer including a stepped mounting member including first mounting member portion and a second mounting member portion, the second mounting member portion having a smaller outer perimeter than and extending from the first mounting member portion;
• wherein the first winding is disposed within the casing and on the lower winding spacer such that the second mounting member portion extends through one of the at least two first board alignment elements and wherein the first printed circuit board is supported by the first mounting member portion.