A properly operating choke (current) balun will cause the currents in
the two conductors to be balanced (equal and opposite) at both ports. So
I guess you could call it a balbal if you want.

Why would anyone want a device that causes the currents at both ports to
be unbalanced?

Roy Lewallen, W7EL

RB wrote:
Good replies. Thanks.

So: does the commonly available choke balun (round cylinder with coax
connectors on each end, and ferrite beads inside the cylinder) allow us to
put unbalanced feed in one end, and get balanced feed on the other?

Or, are they ununs?