Tower #2 is now operational (8/20/00)!
The second tower is also Rohn 45. There are 8 sections plus about 2 feet sticking out of the concrete base. The tower was built on a concrete slab that used to be the floor of a barn behind the current garage.
Here are some shots of us getting things together...
The tower sections arrive after a trip to be re-galvanized. |
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N9VA sets up the mast mounting hardware. There are two Rohn TB-3 thrust bearings used to hold the 170lb mast. NI9E and KA9WXN are checking over the hardware. |
N9LLT and NI9E drive one of the 7 8' ground rods while N9VA and K9YNF supervise. |
Stacking the first few sections...
N9VA and I put up the first 50 feet as pretty much a two-man operation. This is yet another place where a 20hp garden tractor can come in handy! You can see the concrete slab where the barn once stood. Part of the original fieldstone wall is visible to the right. |
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Setting up the guy hardware. There is a set of guys at 35' and another set at 75'. Anchors are 8' long galvanized rods with a 8" helix on the end and are rated for around 10K lbs pullout in undisturbed soil. Guy material is 3/8" fiberglass rod from Polygon. The ends are 1/4" EHS steel cable. | |
Here's a shot facing south. Tower 1 is on the left and tower 2 is on the right. You can also see an R5 mounted to the silo - comes in handy once and a while. Thanks to Ted, N9LLT for most of these pictures. |
Here's a series of shots showing the 20m antenna going up the tramline. | |
We were lucky to pick a day with winds less than 15MPH. | |
View from the ground. N9VA is on the tower. | |
Up she goes. All the pulling is done by the tractor. One man on each tag line and one on the tip line to roll the elements around the guys | |
Got it! | |
The finished product. Plays great for an antenna at 80 feet. |