On Jul 1, 11:53*am, Roy Lewallen wrote:

But a helically-wound radiator *is* a naturally resonant radiator if
wound to make it so. It just isn't straight.

That is true, but a resonant, helically-wound, electrically short
radiator does *not* have the radiation resistance of a straight, self-
resonant radiator of about 1/4 wavelength -- which can make a large
difference between the two forms in the amount of available energy
radiated vs. that lost in the r-f ground system.

RF