On Oct 11, 12:50*pm, "Dave" wrote:


the cushcraft 40-2cd and the xm-240 use them just after the loading coil.
They can also be mounted at the tip of the elements. *They use two *18-24"
long aluminum rods in an X configuration. *More rods, or adding a wire
around the tips adds more capacitance.

The tips is a better location for the hats. You get some degradation
if you
mount the hat just above the coil.
You can check W8JI's mobile antenna info for the why's..
BTW, you generally will use the same techniques for these as you
would a mobile whip..
A half size dipole is basically just two mobile whips end to end to
make a
dipole. All the techniques used to maximize mobile antenna performance
can be applied to half size, or smaller dipoles.