I'm thinking of putting up a 3 element beam on a Rohn 25 type tower.
What is the rule of thumb for how much of the mast pole should stick out of the top of the tower? Should it be kept as short as possible, or is there any problem with having the pole 10ft+ above the top of the tower? I really need another 10 feet to have the antenna fully clear the peak of my roof, and I'd rather not buy another tower section, if I can get the extra height directly from the mast pole.
Also any suggestions on mast pole material. I was hoping to get something that was 1.5" OD, however it seems most poles are only 1.25" OD
What is the rule of thumb for how much of the mast pole should stick out of the top of the tower? Should it be kept as short as possible, or is there any problem with having the pole 10ft+ above the top of the tower? I really need another 10 feet to have the antenna fully clear the peak of my roof, and I'd rather not buy another tower section, if I can get the extra height directly from the mast pole.
Also any suggestions on mast pole material. I was hoping to get something that was 1.5" OD, however it seems most poles are only 1.25" OD