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.P1020422.JPG
Trying to fix a cave in. Sandy soil.
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#4 solid copper over to the house electrical entrance ground. Found more irrigation, Spinkler valve control cable (run in water pipe PVC) and some Romex (indoor only) that the previous owner had run to some outdoor lights. Gotta fix all that.
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Each of the 3 tower grounds are out abot 7 feet from each tower leg, with #4 solid copper and 1 1/2 inch copper strap back to the tower, over to the house electrical ground and down to the ham shack. Two inch rigid non-metal conduit is also buried in the trench to hold 4 runs of LMR-400 coax.
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W7TYQ (Gary) tightens everything down after applying antiseize paste.
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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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OK, how to these hollow fiberglass tubes go together??
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Dave W7DJE helps measure out an element tube. These nesting tubes are pulled out, and the ends are trimmed to length with a hacksaw.
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Adam loves Jessica Kabota.
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Guys from Speedy Angeles Concrete, LLC out of Pasco WA do the work. They have the equipment and muscle, and did the job for a good price.
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Many parts to each unit..
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The guy rods have 6 x 6 x 1/2 in steel plates to keep them from pulling out of the concrete guy station blocks. Picture shows drilling the 3/4 in holes for the rods. I need a slower turning drill press.
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Yea-- this is the way to handle concrete.
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Boom now mounted on the mast, which is mounted on the hazer (antenna elevator) using the thrust bearing (on top) and the Hygain rotator. The antenna will be pushed closer to the top of the mast assembly is complete.
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The reflector EHU and element return fixture mounted on boom.
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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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Here is the house ground rod as we found it. It doesn't meet code. Only one ground was found or wired into the electrical panel, but code requires two, with at least 6ft separating them. The solid copper wire is also too small, and the one rod was not 6 inches below grade. So we fixed that up.
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Gary (W7TYQ) Dave (W7DJE) and Peter (AC7SB) attach the reflector Return Element Support to the boom.
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Let's break off some bolts with an air driven impact wrench. Luckily the manufacturer provided spares.
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Both the EHU and Element Return fixture must be leveled, then torqued to specifications.