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"M. van Wijk" pa5mwremove all(incl) between @home.nl wrote in message ... Hello, I just moved to a new location. My backyard has some 20 trees spread around at a distance of 5 to max 10mtrs between each of them. I would like to opt for a full size 40mtr(7Mhz) vertical and have (only)the 2 following options her: 1) full size 1/4 wire vertical inside fishing pole, mounted in a tree at a foot height between 7 and 10mtrs from ground level. Some 4 elevated radials will be added. 2) full size 1/4 wire vertical at ground level, parallel to a tree at a distance of 0.5 till max 1 mtr. Ground screen will be some 16 pcs of wire buried in the surrounding ground. I have no clue about any effects of trees here. They are not pine trees. There are lots of other parameters in the whole picture, but the trees is a totally unkown factor for me. Please share me your experiences. Thanks in advance. '73 Mark, PA5MW Mark, I had a 40 m 1/4 vertical hanging from a tree branch. Feedpoint was about 8 meters above ground with 4 radials. On the average, performance was equal to the 40 m dipole at 15 meters. It was about 3 meters from the tree trunk. If you are going to have buried, or ground mounted radials, you would need a lot more than 4. Oh, BTW, the tree is 25 m tall. Tam/WB2TT |
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