hello Allen,
I see, I'm a little late, but after looking to my built? of ATU100 I want to share some thoughts and tips...
The binocular core gives some challenge to wind by people with only two hands...?
Windings must not overlap! As primary winding I used a piece of RG58, one side of the shield of both parts soldered to ground.
The toroid cores have to be counter clockwise wound to fit to the PCB. The windings spread over 3/4 of circumference.
I hope it helps anyway...
73
Immo
Immo, DL5KB