(some newsgroups removed) Rich Seifert wrote: (snip)
(and later wrote)
I could get out pencil and paper and go through it.
It seems to me that in the series configuration the current in the center conductor of the coax is the same as in one wire of the balanced line. Also, that the transformer has to be configured so that the shield is at 0VAC. Again, with out actually drawing it on paper, I believe that indicates a 1:1 transformer.