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I have been using an 80 meter loaded vertical for a couple of years with
moderate success. The ground system is a dozen 'untuned' radials 40 or so feet laying on the ground. The feed line is about 100 feet of RG-8 coax. The SWR in the shack is about 1.1 to 1. I have done some research on the antenna and based on it parameters it should have a radiation resistance of about 4 Ohms. This says that the coil and ground are absorbing on the order of 45 Ohms. This is 10db performance loss. I have limited space and the most common solutions are not available to me. From a practical perspective it would seem to me that building a 40 foot center feed loaded dipole and putting it in the attic or on the roof would probably perform somewhat better. Is this a reasonable assumption? Would burying the radials and connecting them to several 4 square foot buried screens substantially help the ground system? Thanks, Dan kb0qil How high is the antenna, where is the loading coil placed, what is its value, and Q? Frank |
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