Installation - Some photos of an HD-70 Tower being installed in Central Iowa.

Amateur Radio Station - K0KT, Ames, Iowa

Special thanks goes to Bill / K0KT for providing the following narrative.


Dan Simmonds, President of ANW Towers (second from the left) delivered this shipmenthimself.
Also shown are locals Dave KI0Q (local tower and climbing expert),  Denny (buildingcontractor for
the new house) and his son Jamie. The locals came over to help unload the truck and willalso
help with the construction and erection of the HD-70.
 
 

All of the stuff will be stored in the garage until the concrete has cured. In additionto the HD-70,
Dan also delivered the 2 7/8 inch diameter 22 foot long 1026 DOM high-strength carbon steelmast in
the foreground and 150 feet of Nello 25N tower sections, that are just behind the HD-70sections.
These Nello tower sections are for three Array Solutions AS-25N-80 verticals to beused for an 80-meter
triangle array. As you can see in the picture, the top section of the HD-70 has a rotatorplate as well as
a mid-plate. The mid-plate will stabilize the long mast, should the rotator ever haveto be removed. The
thrust bearing has been installed on the plate at the top of the tower. Also note theclimb-protection
panels to the right. Everything shown in this picture was ordered through Array Solutions
 
 

This is the rebar for the pad and pillar base, surrounding the base section. Note the4-inch
conduit and the #4 copper wire that will run back to the single-point ground at theresidence.
 
 

Here you can see the forms for the pad and pillar base. Making these forms requiredextra time
and effort, but the smaller footprint of the pad and pillar base appealed to KA0IOR(K0KT's wife).
The base section was leveled with a laser level, but checked with an old-fashioned 4-footbubble level.
Note the 2x6s and stakes that were used to keep anything from moving when concrete ispoured.
 
 

This is the beginning of the concrete pour. A second truck was on its way with the
rest of the concrete that was needed.
 
 

Concrete is being added around the edges for the pad, and the pier is being finished.
 
 

A couple of months later, house construction had been completed, the concrete had cured, and it
was time to put up the new tower. The first step was to lay out the seven 10-foot sections, in order.
 
 

Tower erection was a new experience for Denny's crew. Here they are doing a dry-run using only
the bottom section to make sure everyone knows what to do the next day when it is time to lift the
entire tower with the crane.
 
 

The skid-loader is being used to position the sections as they are bolted together. Note the
big bucket of bolts that came with the tower.
 
 

This photograph shows the 22 foot 1026 DOM high-strength carbon steel mast and the
Prosistel PST71D rotator. Note the climbing steps (large bolts protruding from the top tower edge)
on the HD-70 and the Safety Lifeline System (3/8" x 19 galvanized aircraft cable) running to the
top of the tower. K0KT will be safely connected at all times when he climbs his tower. The steps
on the mast above the top of the tower are temporary and will be removed after all of the
antennas have been installed.
 
 

At the end of the day, the HD-70 and an OptiBeam 4-40 4-element 40-meter Yagi are both ready
to be lifted when the crane arrives in the morning.
 
 

All of the tools and parts have been set out, ready for the lift. The #4 copper wires are the ends
of the three 60-foot lightening-protection radials that were installed for the tower.
 
 

This is the beginning of the lift.
 
 

Here the HD-70 is nearly vertical.
 
 

After the crane lifted the HD-70 to vertical, it was moved over the base and here is being guided down.
 
 

The crew is tightening the bolts on the first leg to be attached. Everything went very smoothly
for this novice crew. Obviously only two people would have been needed, but all wanted to be
here for this part of the project. From the time of the arrival of the crane to this point took only
about 30 minutes.
 
 

Getting antennas up and down a non-guyed tower is relatively easy, but because the crane
was there it was also used to lift the OB4-40.
 
 

Dave, KI0Q, is attaching the OB4-40 to the mast.
 
 

Later in the day the rest of Andy's family stopped by to see the work. His sons wanted to
climb the tower! Clearly, it was time to install the AN Wireless climb-protection panels.
 
 

Now the HD-70 will be impossible to climb without a 10-foot step ladder.
 
 

View from the street. Neighbors have commented on the beauty of the installed antenna system.
 
 

Here is picture of the completed HD-70 and antennas from the top of one of the 80-meterelements.
With a wide margin for safety, relative to the maximum design load of the HD-70, thetower supports
an OB4-40 at 80 feet, an OB16-2 at 71 feet, inverted vees, and VHF/UHF antennas.



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