[Elecraft] Coax-Fed Antenna for KX1 with ATU

[Stuart Rohre]

Very good point Charles,
Harmonic pattern is certainly going to be multi lobed and pretty hard to
notice unbalance current.

Why L. B. Cebik finds that unbalance current in an End Fed Zepp was only 10
per cent, which was surprising and perhaps function of feeder length too.
No, I am not against unbalance current, unless it causes Rf in the shack.
Just pointing out conventional transmission line balun is not going to
remove it from the elements.

A good point was made that the impedance transformation of the "balun" was
what it was doing that was helpful, and the size did not put too much weight
on center.   I wonder if open wire would be just as forgiving of what it was
loaded into.  Probably based, on the Cebik Zepp example.

Antennas are fun,  probably any one with match issues could correct the
mismatch to his tuner by adding some feedline to move things around ie the
hot spot, to get the impedance within range of the tuner.  Just that doing
that with coax carries a bit more loss penalty than open feeders.  Since you
may have unbalance anyway, I would use lower cost feeder---open wire line
and live with any imbalance current.
-Stuart
K5KVH