While we are on the topic of harmonics:
If a rig does have spurs or harmonics in the output the antenna MAY not radiate much of it.
A 40M dipole will radiate 15M spurs or harmonics. The same will be greatly attenuated if harmonics/spurs
are present on say 20M or on a frequency that the antenna is not resonant.
I have not done experiments on this thought but some of you may have given it more thought or
even done some tests.
Bengaluru, South India.