Tom Donaly wrote:
What he believes is that
since he can't detect any harmonics emanating from a sinusoidally
fed dipole, the current along its length must be a sinusoid.

The non-existence of harmonics is prima facie evidence
that only single frequency sinusoids exist. A properly
functioning antenna system is linear. Any perceived
non-linearity is an illusion.
--
73, Cecil http://www.qsl.net/w5dxp