[TowerTalk] To get a truly balanced antenna feed

[Steve Hunt]

Some readers may be interested in measurements made on a "real world" 
antenna - a 100ft doublet centre-fed with window-line.

At the shack end of the window-line, the equivalent star-network 
impedances measured at 3.5MHz were:

Z1 - Window-line Leg 1 to Star Common: 15.1 - j79
Z2 - Window-line Leg 2 to Star Common: 1.6 - j109
Z3 - Star Common to Ground: 30.7 + j110

A perfectly balanced system would show Z1 = Z2
Z3 is related to the common-mode impedance of the system to ground.

Steve G3TXQ