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.P1020733.JPG
Installing the driven element return fixture.
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Rebar grid construction for tower base.
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Steve WA7DUH; Peter's wife Tacy (on the end); Gary W7TYQ and Dave W7DJE trying to program a 2M handi-talkie; and Peter AC7SB.
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Lower painted line marks the height of the concrete.
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Left To right: Gary W7TYQ (Yreka CA), Dave W7DJE (Florence, OR) and Steve WA7DUH install the rollers on the hazer. Gary and Dave drove up to help Steve & Linda put this antenna up on the tower.
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Rubber boots hold the elements into the EHU sockets.
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Coax switching unit. All three active elements may be driven.
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Distance between this driven element EHU and the element return fixture is critical. Houston, we have a problem. The driven element is centered on the mast, which means it will loop around the tower. This will cause great difficulty with the tower guy lines.
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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.
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Diagonal rebar wires are used to keep the grid square.
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Steve is a slave driver. Time for lunch!
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Holes for guy station anchors are 6ft long,4 ft wide and 4 ft deep. Concrete blocks are used to hold the rebar cage up off the bottom 6 inches so they are embedded in concrete when poured. Painted lines indicate the level of concrete when poured.
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It's 104 today, so sweat band and wet neck towell in use!
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The engineered specs call for #7 rebar (7/8"). Are we holding up a 2000 ft TV station antenna?
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Mast installed is 2 inch high strength galvanized steel about 8 feet long.
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Originally tried to lift rebar cage from a single point, but it caused the rebar cage to deform. A lifting frame was then built which pulled up vertical instead of an angle.
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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.