Reg Edwards wrote:
But a Choke Balun hss no impedance or voltage ratio. It is incorrect
to refer to it as having an impedance ratio such as 1-to-1.
But I do not understand what is meant by a Current Balun.

Reg, the words, "choke" and "current" have become synonymous
when used as an adjective to describe baluns. A choke-balun
*is* a current-balun, usually a 1:1. N:1 current baluns exist
where N is not equal to one. Sometimes, an extra winding on
the toroid ensures that the currents are balanced.

Perhaps Roy, who is very good at it, could define what is a Current
Balun if there is such a thing. And while he is about it, Voltage and
Choke Baluns.

Try: http://www.eznec.com/Amateur/Articles/Baluns.pdf

Also: http://www.w2du.com/r2ch21.pdf

Current baluns balance the feedpoint currents and voltage baluns
balance the feedpoint voltages. Since unbalanced currents cause
radiation from the feedline, current baluns are considered
superior for amateur radio applications. The W2DU choke balun is
a member of the subset of current baluns.
--
73, Cecil http://www.qsl.net/w5dxp