[Elecraft] ATU efficiency and the Elecraft T1

[Stuart Rohre]

L. B. Cebik, W4RNL, explored the "im balance" of the end fed Zepp antenna, 
a half wave with open wire feed where one side of the wire connects to 
nothing, and the other to the antenna end element.

That would seem to be the extreme case of current imbalance but he found 
typically, there is only 10 per cent less current in one conductor at the 
rig end, than the other.  The line seems to divide the power available, 
rather than one wire being a true zero current.

This was done for a floating system, or a closed system, ie dipole in space, 
no other ground.  That would pretty well approach the floating system you 
have used on rock.

Stuart
K5KVH