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MTV wrote:
Steve, One thing I found out AFTER I'd put up my HF beam is that 1) I'd mounted the beam too close to the tower, abt 4" - just enough to clear the tower, or 2) I should have located the top egg insulators on the guy wires right next to the tower instead of 3-5' below. Methinks the guy wires at the top of the tower may be resonate on 10-15 meters and raised the SWR being so close to the HF beam. I also put VHF/UHF beams on top of the mast about 3' above the HF beam but their SWR is a very wide band 1:1. If I had to do it over again I'd use a longer mast, which I could have done since the lower part of the mast is secured at least 3' below the rotator bushing. Marv W5MTV He makes a good point. I was responding only to the antenna elements, boom and mast. The environment surrounding it needs to be reasonably clear, and that includes height above ground. tom K0TAR |
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