Shared Ground

Uses the same lengths of wire for single or double stack configuration.

Prepare the wire ends.

Slightly offeset the end of the twisted pair.

The twisted section will be a bit over 3" in length.

Wind onto the core in a counter-clockwise fashion.

Cross over the core at turn 11.

Remove the enamel from the wire where it will be soldered.

Solder the primary side wires. You will also solder the ground side of the secondary at this time.

Make a wire jumper to connect from the G pads in the toroid block over to the CP pad. You may consider soldering this ground jumper in at the same time as the primary and secondary grounds. I ended up soldering the jumper at the CP pad on both the top and bottom of the board.

Checking the completed board with a nanoVNA.

The completed board.