I am in the process of making a 1:1 balun for QRP use and this has made me
think! I have seen many balun designs and construction articles. A fair
proportion of theses advocate twisting the wires before winding on a toroid
core. I have never seen a clear explanation as to why they are twisted.
Does it improve the balance? Does it affect the coupling? Is it better to
twist or not to twist - that is the question.
Dick G4BBH