FORT BRAGG PROJECT
 

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3rd Special Forces Group
(Airborne)

Fort Bragg, North Carolina
 

Turn-key Installation

 120' Rohn 65G Tower
Log Periodic Yagis
Prosistel 'Big Boy' Rotor, TIC RingRotors
Custom Guy Anchors, Mast & Rotor Clamp
Array Solutions Antenna Switching
ICE Grounding Products

 

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Letter Of
Recommendation

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  • The antenna system features stacked phased large log periodic antennas which are controlled by the Array Solutions StackMatch, four long wires and three NVIS antennas also controlled by a custom control system using two StackMatches and a SixPak RF Matrix. Tower is 120 feet tall with two star guy brackets. All Antennas rotate individually.

  • Top Log antenna is 60+ feet long with longest element of 77 feet. (6.5-30Mhz)

  • Mid and lower Logs are 42 feet long (13-30Mhz)

  • 4 Long wires are 900 feet long and 40 feet up Terminated in 600 ohms.

  • The long wires are fed with Array Solutions Baluns (2-30 Mhz). 

  • 3 NVIS 234 foot dipoles (2-30 Mhz) are feed with Array Solutions Baluns and 600 ohm feed lines.

  • Radial field of 60 radials ~75 feet long installed for the long wire feed point.

  • This system has already proven itself in making long and short haul communications very reliable.

    •
Antenna System Photos
 

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The Crew
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Paul Nyland - K7PN
Owner of Custom Metalworks		 Jay Terleski - WX0B
Owner of Array Solutions
Zach - KD7QBU (aka. 'The Cube') Sgt. Denny Osgood
 

Project Construction Photos
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Digging the anchor holes Guy anchors designed and built by
Custom Metalworks
Pouring yards of concrete! The pour continues...
K7PN posing with finished guy anchor WX0B with Spaz the cat
Pier pin tower base
WX0B trying to communicate while the
C-130s fly by during an exercise		 Apache helicopters fly by
Chinook helicopters carrying
artillery pieces		 More Chinooks...  The one on the
right is carrying a Humvee
Custom mast assembly for top
Log Periodic yagi		 Another view of the mast
Prosistel PST-71 BigBoy rotor with
custom made mast clamp and rotor plate		 TIC RingRotor mounted above the
bottom anti-torque guy bracket
K7PN operating the boom truck crane Raising the lower part of the tower
Up goes the lower part of the tower The lower part of the tower is held in
place by the crane while the guys
are connected to the anchors
Here's Zach, KD7QBU,
tensioning the guys		 Preparing to install the
upper part of the tower
Setting the upper tower sections Jay and Zach building antennas
The big crane arrives to install the antennas Up goes the top of the tower
The top of the tower going up Top of the tower swinging into place
Securing the top of the tower Up goes the middle yagi
Middle antenna swinging into place Securing the middle yagi
Preparing to pick the top yagi Setting the top yagi
Securing the top yagi Top antenna in place and all trussed up
K7PN rappelling back to terra firma Ready to pull a few feedlines!
That's 10 spools of LMR-600
View of the tower from the radio shack K7PN manning the winch at the other end
of the feedline and control cable pull
 
Zach attaching one end of the
wire antennas to the cross arm
at the top of a telephone pole		 One of the end insulators
used on the wire antennas
Copperweld antenna wire spooling fixture Wire antenna installation crew
Radial system at the feedpoint
of the long wire antenna system 		Cable enclosure at the base of the tower
Close-up of the cable enclosure 3rd Special Forces provided us this
tent which served as our job shack
 
Some of the troops we met while
 building the antenna system.
There's Spaz the cat in the foreground		 The truck is all packed and ready
for the long drive back to Oregon

 

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Last modified on June 18, 2008 14:40:23 PM