Twinlead, ladder line, and other symmetrical lines are often called
"balanced" lines -- as you've done here. But it's important to realize
that there's nothing about these lines that causes the currents on the
lines to be equal and opposite (or "balanced"). Imbalanced currents
cause feedline radiation. Symmetrical lines can be unbalanced, and coax
can be balanced. To learn a little more about this, see "Baluns: What
They Do and How They Do It" in the _ARRL Antenna Compendium_, Vol. 1.

Roy Lewallen, W7EL

You are correct - as usual - so - if the transmission line (up to the point
of connection to that conglomeration) was carrying a balanced current (
equal in voltage and opposite in polarity at corresponding points ) - then
the aforementioned line could continue to assist with the migration of
electrons along the path of conductance in a balanced manner.
;-)
that's why a half-wave of coax can be used at a particular freq as a 4-to-1
balun - where the braid is 'left behind' but the current continues with the
voltage doubled - thus quadrupling the impedence matching ability... ...
and all that stuff



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