First half primary Np/2 winding: space evenly over the bobbin.
Cover with one layer of tape
Wind first half of balancing section Nb/2, spread over half
width of the bobbin, start on floating pin A and return to floating
pin C
Wind second half of balancing section Nb/2, by starting from
pin C and finishing covering the bobbin width; return to floating
pin B. Cover with two layers of tape
Wind Ns1, Ns2 and Ns3 (6 turns, 9 strands split over three pair
of pins) starting on pins 9, 8 and 7 and ending respectively on
pins 4, 5 and 6. Apply spacers according to safety requirements or
use triple insulated wires (TIW). Cover with two layers of tape in
case of ECW wire, with one layer only in case of TIW.
Shield: wind a single-turn copper foil (8mm width, 0.05mm
thick) and connect it to terminal C. Cover with one layer of
tape
Finish by winding the second half primary Np/2; space evenly
over the bobbin. Cover with one layer of tape
Add copper foil shield around the assembled core connected to
floating pin C, cover with tape.