Albums: WA7DUH And WB7CNV Tower Construction
WA7DUH And WB7CNV Tower Construction
Photo essay of tower project at the station of Linda WB7CNV and Steve WA7DUH. They live just outside of the Richland and West Richland city limits in Benton County. Project is to initially erect a 65 ft guyed tower, but to design it for 75 ft or higher. Benton County has an ordinance controlling "communications facilities" (BCC 11.65) which includes "communication towers and antennas." Many of the requirements are exempted for amateur radio towers and antennas not exceeding 65 ft.P1020499.JPG
Adam loves Jessica Kabota.
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Yes, the droop is normal. Note the middle driven element has not been installed in this picture. The tree has to be removed.
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Mast installed is 2 inch high strength galvanized steel about 8 feet long.
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The #4 solid wire and the copper strap is also run to the house electrical ground and into the ham shack entrance.
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Assembling an inner guide and support tube that is slid into the large end of the element tubes to provide a consistent diameter for the beryllium tape that must slide in and out.
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A completed element. 30M & 40M beam operation is achieved by pushing the beryllium tape through the sweep and down the "return" side, creating a resonant folded element. Thus these elements are only 40 feet wide instead of the 62 feet that would be required if they where straight out.
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Director element EHU and element return fixture.
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Rubber boots hold the elements into the EHU sockets.
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The tower base hole. 2x4's above the forms hold up and align the top rebar grid. There is also lower grid sitting on concrete blocks. The tower base that will be submerged in concrete floats in the center of both the top and bottom rebar grids. Temporary guy ropes hold the tower in perfect plumb. Grandson Adam approves.
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A better view of the rebar cage.
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How is this supposed to go???
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Rebar cage for guy station is lowered onto concrete blocks that elevate up off the bottom.
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It looks like coax in this picture, but it is Phillystran, a non-conductive arimid fiber guy wire. Good for about 4,000 lbs pull.
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After assembling 1 of the active elements on the grass by the tower in about 3 hours, assembly was moved into Steve & Linda's shop where an assembly line could be set up, as there are 6 of these to make. Time was reduced to about 1 hour per unit.
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Many parts to each unit..
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Boom joiner on the SteppIR Dream Beam DB18E). Colored dots on the pieces helps the assembler to find and line up the proper pieces.
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A view of the trench heading down to the ham shack. That white bottle in the picture is copper anti-seize/anti-corrosion goop that is used liberally on ALL copper-to-copper connections.