I am in the process of erecting a Rohn 25G to 30 feet with a house bracket. My
question is how long should the mast be within the tower? I have a thrust
bearing top plate and a good rotor for the load, but should the mast extend 2
feet below the top plate or 6 or 8 or 12 feet. Would there be a real advantage
to letting the mast go below the next tower joint down (10 ft). DX sells a
high budget mast they they won’t cut, it is 22 feet long. I don’t think I want
to have a mid sized triband 10 or 12 feet above the top plate/thrust bearing.
My plan is to place the antenna at about 5 feet above the top plate/bearing
Speak to me someone who knows. Please. All advice greatly appreciated. Clif
AA6FE.
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