Why is a transmitter dipole's ends the max/min voltage instead of the middle?
On a dipole there is a spread of current and voltage, in very simple words: at the end of the dipole, no current is built up b/c it is an open end, so there the voltage rise to a maximum. The impedance at the ends of the dipole is very high compared to the impedance at the feed point.
I think, the wikipedia Web site explains this quite well.