feeding vertical dipoles
 

Anyone have an idea as to how much the radiation pattern will be altered
if the coax feed runs down the vertical dipole as opposed to coming out
from the feedpoint at a right angle ? Tnx for the help.

Gary

On Thu, 02 Dec 2004 21:28:03 -0800, Angela & Gary
wrote:
Anyone have an idea as to how much the radiation pattern will be altered
if the coax feed runs down the vertical dipole as opposed to coming out
from the feedpoint at a right angle ? Tnx for the help.

Hi Gary

Not so much that you would notice. It might upset tuning, but even
there it is a toss up. About the only screw up would be that the
lower element goes to the coax center conductor, and your coax shield
makes contact with it while both drop in vicinity.

73's
Richard Clark, KB7QHC

Angela & Gary wrote:
Anyone have an idea as to how much the radiation pattern will be altered
if the coax feed runs down the vertical dipole as opposed to coming out
from the feedpoint at a right angle ? Tnx for the help.

Gary

You probably won't be able to notice any difference, as long as the
coax doesn't touch the lower element. Spacing of an inch or two is
all that should be necessary.

I have a vertical dipole for 10 Meters. The lower section consists
of a ~2 inch pipe and the coax is run inside the pipe, to the center
of the dipole. The upper section is a thinner rod, because it's not
needed for support like the bottom section is. Each element being a
different diameter poses some problems in matching, but in the end,
it works very well.

Martin - K7MEM

--
Martin E. Meserve - K7MEM
http://www.k7mem.com