Dan Simmonds,
President of ANW Towers (second from the left) delivered this shipment
himself.
Also shown
are locals Dave KI0Q (local tower and climbing expert), Denny (building
contractor for
the new house)
and his son Jamie. The locals came over to help unload the truck and will
also
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 addition
to the HD-70,
Dan also delivered
the 2 7/8 inch diameter 22 foot long 1026 DOM high-strength carbon steel
mast in
the foreground
and 150 feet of Nello 25N tower sections, that are just behind the HD-70
sections.
These Nello
tower sections are for three Array Solutions AS-25N-80 verticals to be
used for an 80-meter
triangle array.
As you can see in the picture, the top section of the HD-70 has a rotator
plate as well as
a mid-plate.
The mid-plate will stabilize the long mast, should the rotator ever have
to be removed. The
thrust bearing
has been installed on the plate at the top of the tower. Also note the
climb-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 the
4-inch
conduit and
the #4 copper wire that will run back to the single-point ground at the
residence.
Here you can
see the forms for the pad and pillar base. Making these forms required
extra 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-foot
bubble level.
Note the 2x6s
and stakes that were used to keep anything from moving when concrete is
poured.
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-meter
elements.
With a wide
margin for safety, relative to the maximum design load of the HD-70, the
tower supports
an OB4-40
at 80 feet, an OB16-2 at 71 feet, inverted vees, and VHF/UHF antennas.
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