[TowerTalk] HY-Gain TH-11DX

[K7LXC@aol.com]

In a message dated 11/27/2005 8:16:52 A.M. Pacific Standard Time,  
towertalk-request at contesting.com writes:

>  Hi all, I have been thinking about Putting up a HY-Gain  TH-11DX. My tower 
is a Rohn 20G at 50'. I have a few questions.
How much  twist will the 12.5 sq.ft. windload put on the 20G tower? 
 
    A lot. Rohn limits 20G to 2 square feet of  antenna @ 70 MPH - it's a 
"Home TV Tower".
 
>  Will it just twist the tower into failure.


    Probably.

>  Do I need to put up 45G or 55G.
 
    Not necessarily. Rohn 25G will take that kind of  load but not 20G.

>  I would like to go up to 70'.
 
    Rohn only gives specs up to 40'.

>  I have a 5'x5'x4' base for the tower I have up now, Would  that work for 
45G?
 
    Sure. Grind out whatever is sticking out of the  concrete now and then 
use a flat base on the bottom. You can drill out the  concrete for anchor bolts; 
epoxy them in, then bolt the plate to them and  you're good to go. 




Get a Rohn catalog -  available free on cd from _www.rohnnet.com_ 
(http://www.rohnnet.com)  or you can look up the  appropriate pages on the website 
catalog - and follow their specs. Then you'll  avoid violating the LXC Prime 
Directive to "DO what the manufacturer says". 
 
Cheers,
Steve    K7LXC
TOWER TECH -
Professional tower services for commercial and amateur
Cell: 206-890-4188