Windom balun made with Amidon ferrite
toroids.
Note: This design is for 80 meter
as a lowest band. If you want to make it for 160 meter increase the toroidal
core windings to 2 x 16 turns or use Amidon FT-140-43.
See also the enhanced OCF 2014
balun here
Windom balun made with surplus ferrite
rods