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.
138 images Submitted by WA7DUH Steve St... on Sat, 08/04/2012 - 11:19am

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Uploaded on 09/13/2012 - 7:03pm by WA7DUH Steve St... 665 visits

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Uploaded on 09/25/2012 - 11:01am by WA7DUH Steve St... 663 visits

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Rebar cage for guy station is lowered onto concrete blocks that elevate up off the bottom.

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Uploaded on 08/14/2012 - 5:24pm by WA7DUH Steve St... 661 visits

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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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Uploaded on 09/13/2012 - 7:03pm by WA7DUH Steve St... 650 visits

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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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Uploaded on 09/25/2012 - 11:02am by WA7DUH Steve St... 635 visits

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Many parts to each unit..

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Uploaded on 09/25/2012 - 10:59am by WA7DUH Steve St... 633 visits

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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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Uploaded on 09/25/2012 - 10:58am by WA7DUH Steve St... 622 visits

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Uploaded on 09/15/2012 - 7:35pm by WA7DUH Steve St... 615 visits

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Uploaded on 09/25/2012 - 11:04am by WA7DUH Steve St... 614 visits

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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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Uploaded on 09/03/2012 - 6:27pm by admin 601 visits

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Although not called for in the assembly manual, on recommendation from Brian W7BJN, a glue bead is placed at each nesting tube junction to prevent them from sliding back in over time. Constant movement in the wind at the top of a tower can cause them to work in according to Brian. Made sense to this crew.

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Uploaded on 09/25/2012 - 11:01am by WA7DUH Steve St... 596 visits

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Uploaded on 09/25/2012 - 11:03am by WA7DUH Steve St... 592 visits

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Uploaded on 09/03/2012 - 6:26pm by admin 591 visits

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OK, how to these hollow fiberglass tubes go together??

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Uploaded on 09/25/2012 - 11:01am by WA7DUH Steve St... 587 visits

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Uploaded on 09/15/2012 - 7:34pm by WA7DUH Steve St... 587 visits

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Time to pour concrete. The concrete truck can only reach one guy station, so a motorized wheel barrel is used to transport 8 yards of concrete into the main tower and guy station holes.

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Uploaded on 08/14/2012 - 5:29pm by WA7DUH Steve St... 585 visits

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Uploaded on 08/14/2012 - 5:30pm by WA7DUH Steve St... 579 visits

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One of three ground tower ground rods. The are each connected to a tower leg with both a #4 solid copper wire (per NEC) PLUS a 1 1/2 inch low RF impedance copper strap. Once connections are made, the ground rod is then driven down so it is at least 6 inches below grade.

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Uploaded on 09/03/2012 - 6:26pm by admin 577 visits

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Uploaded on 09/25/2012 - 11:02am by WA7DUH Steve St... 568 visits

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Uploaded on 10/10/2012 - 5:38pm by WA7DUH Steve St... 567 visits

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Uploaded on 09/25/2012 - 11:03am by WA7DUH Steve St... 565 visits

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Uploaded on 09/25/2012 - 11:01am by WA7DUH Steve St... 564 visits

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Uploaded on 09/25/2012 - 11:03am by WA7DUH Steve St... 563 visits

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Uploaded on 09/25/2012 - 10:58am by WA7DUH Steve St... 563 visits

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Uploaded on 09/25/2012 - 11:02am by WA7DUH Steve St... 560 visits

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Uploaded on 08/14/2012 - 5:24pm by WA7DUH Steve St... 559 visits

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Uploaded on 09/25/2012 - 11:03am by WA7DUH Steve St... 557 visits

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Coax switching unit. All three active elements may be driven.

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Uploaded on 09/25/2012 - 11:01am by WA7DUH Steve St... 557 visits

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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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Uploaded on 09/25/2012 - 10:57am by WA7DUH Steve St... 555 visits

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Uploaded on 09/25/2012 - 11:03am by WA7DUH Steve St... 554 visits

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Uploaded on 09/25/2012 - 11:00am by WA7DUH Steve St... 554 visits

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Installing the driven element return fixture.

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Uploaded on 09/25/2012 - 11:00am by WA7DUH Steve St... 553 visits

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Driving those ground rods down at least 6 inches below grade with a power hammer.

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Uploaded on 09/03/2012 - 6:26pm by admin 550 visits

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Yea-- this is the way to handle concrete.

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Uploaded on 08/14/2012 - 5:30pm by WA7DUH Steve St... 546 visits

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A very thick polifin heat shrink tube locks each joint into place.

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Uploaded on 09/25/2012 - 11:02am by WA7DUH Steve St... 545 visits

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Uploaded on 10/10/2012 - 5:40pm by WA7DUH Steve St... 544 visits

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Uploaded on 10/10/2012 - 5:38pm by WA7DUH Steve St... 542 visits

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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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Uploaded on 08/14/2012 - 5:30pm by WA7DUH Steve St... 542 visits

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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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Uploaded on 09/03/2012 - 6:26pm by admin 539 visits

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WB7CNV (Linda) bows properly to the tower gods.

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Uploaded on 08/14/2012 - 6:13pm by WA7DUH Steve St... 536 visits