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I am helping to install a 135 foot dipole on a hillside for HF
activity. The antenna will be at least 45 feet from the ground in any direction. I can believe EZNEC so far as the effects of ground on impedance. but I am at a loss when it comes to considering the patterns on the various bands. The ridge is about 200 feet from the antenna. This is for a club member who recently upgraded to General Class. Since the ridge is close to the same height and south of the antenna, I am guessing that the computed charts will be a good representation of the northern half of the antenna. NVIS should not change much. The terrain may work as a reflector for over the pole operation. I am afraid the antenna will be of little use to the south. I expect we will eventually need to do the best we can with an antenna on the top of the ridge. When the snow melts I will try to climb the ridge for a look-see. It will likely be difficult to install due the dense trees. Any comments, advice, suggestions etc. are appreciated! John Ferrell W8CCW |
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