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Re: [TowerTalk] Raising a TH-11 DX antenna

To: w8qwdave@casair.net, towertalk@contesting.com
Subject: Re: [TowerTalk] Raising a TH-11 DX antenna
From: TexasRF--- via TowerTalk <towertalk@contesting.com>
Reply-to: TexasRF@aol.com
Date: Thu, 16 Jun 2016 11:20:34 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Dave, you have to have competent ground help to do all of the weight  
lifting. With upwards of a hundred pounds of weight the man on the tower can  
only help.
 
Unless you have obstructions near the tower you should be able to mount a  
pulley up on the mast to use in lifting the antenna. The higher, the better. 
As  the antenna reaches the top, the tower man can manipulate the elements 
around  the guy wires, one at a time while the ground help slowly raises the 
antenna.  The elevated pulley is key in allowing the antenna to be moved 
around to clear  the guy system. An additional rope (tag line) is helpful to 
allow the ground  help to pull the antenna away from the tower as needed.
 
The tram system works well but for antennas the size of a TH11 you can  
install the antenna in less time than rigging the tram setup.
 
These are my opinions; as in every task, there are multiple methods that  
will work.
 
73,
Gerald K5GW
 
 
 
 
In a message dated 6/16/2016 9:52:17 A.M. Central Daylight Time,  
w8qwdave@casair.net writes:




I have one of these beast that I have resurrected and  am ready to put on 
top of a 70' Rohn 45 tower.  The tower is properly  guyed and 
steady as a rock.  My question though is how to get the  antenna from the 
ground to the top of the tower.  

At Dayton this  past spring I bought the ARRL's book on towers and antennas 
and have been  reading about "tramming" the antenna to the 
top and then placing it  accordingly.  That seems attractive but this is a 
very heavy antenna and  my concern is the strength of the 
mast to hold the rope tight while the  antenna is making its way to the top.

My understanding is that in the  "tramming" method the antenna is carried 
to the top by a sling (more or  less)and then put in place 
once it reaches the top.  

The  other method involves sliding the antenna up two ropes spaced apart at 
the  bottom of the tower, beyond the guys wires.  This 
sounds good but  there are phasing tubes on the underside of the TH_11 that 
could be (most  likely would be) damaged in this method.

I've thought abut paying a guy  to bring in his crane (lots of height and 
lifting capacity), but that's  another cost that I'd like to 
avoid if at all possible.  

So,  I'm open to suggestion and the wisdom of the group's experience.

Thanks  in advance.

Dave,  W8QW
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