Jerry wrote:
Finally, I have seen screwdrivers mounted on the ladder
in the horizontal facing rearward and high enough to stay
away from other vehicles. Then it was braced with another piece of non
conductive material in that position
OR slanted up towards vertical. This, of course, kept it
out from bridges but let it operate well. Use a stiff upper
whip.

Another idea is to locate the antenna on top of the vehicle and
install a very large top hat one foot above the coil. That would
limit the height of the antenna system to about four feet above
the top of the vehicle. I once tried an experiment of a 6'x14'
piece of 1/4" hardware screen mounted four feet above the cab
of my pickup used as a top hat for my High Sierra screwdriver.
It minimized the amount of coil required and put out one heck
of a signal. Field Strength measurements indicate that it would
have placed at the top in a 75m mobile shootout.

A 6'x14' top hat would actually be easier to implement on an RV
than on a pickup.
--
73, Cecil http://www.qsl.net/w5dxp



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