Counterpoise is required for most antennas to operate "effeciently" (have
you ever tried to load a 1/4 wave whip (without one)? Makes great dummy
load! Dont radiate worth a darn! Needs the full "1/2 wave" to radiate
effectively say that as can be done with loading coils, ect to shorten the
effective length, or a ground media for the 1/4 part to work against (tho,
at vhf there are SOME 1/2 wave , base coupled antennas that need no counter
poise-- but then talking 75 meters- 125 foot tower to do that!!



Cecil wrote:
Jim wrote:
And, one other idea !! (found on the bay of "e"), and available
elsewhere-
a mount for 2 of these (or the hustler, and an Iron Horse, ect) "1/4"
wave
antenna -- first antenna goes to center of coax, second goes to shield!!
makes a dipole, about 15 foot long, and can be mounted to mast
(conductive,
or plastic, same diff! tho the impedence will be quite low (because of
these loaded
whips), and the effeciency will be also not the best, at least would be
an
effective counterpoise!! and, to boot, parts available to build adaptor
at
rip-off shack!! got whole thing off epay for about 50 bux, +
shipping!!
Jim NN7K

What do you consider to be the purpose(s) of a counterpoise?
--
73, Cecil http://www.qsl.net/w5dxp



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