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I was wondering if anybody out there is using two mobile whip antennas
on top band. The antenna would have max gain at 90 degrees but it should provide good local contacts if placed at a height of 70 feet. If one draws a circle as a radiation fields one could see where the maximum gain is i.e. 90 degrees. Now if you draw an antenna field with less than half the gain the max would still be at 90 degrees but the gain loss at say 15 degrees is minimul at best. In my case when modeling my particular dipole I can make tremendous strides in efficiency if I attach wires at the end of the dipole that hang to the ground But when comparing gain say at 15 degrees horizontal there is no worthwhile increase in gain ie less than 10% of the difference ! It would appear to me that if you are unable to put in a large area of a ground system one would do better with shortened dipoles but well away from ground Comments Art |
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