Tom Bruhns wrote:
There is no such thing as "the voltage" between the ends of your
excited dipole at an instant in time.

Perhaps they meant the voltage 'across' the ends of the dipole. The
ends should always be an electrical half-wave out of phase, right?
There should only be two instants of time during a period when the
difference in potential from end to end is zero.

What are you saying exactly, Tom?

73, Jim AC6XG