Roy Lewallen wrote:
Of course, the feedpoint impedance will
be different if you choose another feedpoint.

Here is the confusing quotation:

The impedance of the antenna doesn't change with the feed method
(assuming of course that it has a single feed point)

A center-fed dipole has a "single feed point". An off-center-fed
dipole has a "single feed point". The feedpoint impedance of the
antenna does indeed change depending upon where that single
feed point is located.
--
73, Cecil http://www.qsl.net/w5dxp