You never know what you'll find when dismantling a tower... I was recently involved in dismantling the antennas of a silent key. One was a Mosley trap tribander on 50 feet of Rohn 25G, bracketed to t
Well, I'll 'fess up to being involved with a club that had 30 feet of Rohn 25 on top of a 9-story office building in downtown DC where the base of the tower was free-standing, held in place only by "
At least two up here. I have nearly the same situation you describe. 50' of 25G bracketed to the house. Base is 4 ft in the ground, buried in 1.5-inch crushed stone. No guys installed -- none needed
FWIW, Rohn manufactures a drive in base for 25G that does not require any concrete. It is part number SDB25G and is similar to a regular concrete base plate except that a large flanged spike is welde
[snip] Bob, out of curiosity, how many house brackets and at what height? [snip] 73 Malcolm KR4HP -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Admi
All ya'll I have 2 cents :-) If the engineering and cost analysis says, "CONCRETE" then concrete is warranted. If it says, 'pier pin', that's the way to go. If a spike base and two house brackets mee
Whoops!!! I didn't look far enough. In the 25G parts list, Rohn "stars" this base along with others that "...must be bracketed or guyed at all times." 73 Malcolm KR4HP -- FAQ on WWW: http://www.conte
Yep, the lateral forces at the base of a tower are quite small. The GUYS take the horizontal load, transfering it to a vertical load on the tower. It is my understanding that the limiting factor in t
If you put up a guyed tower without a concrete base (bottom section just stuck in the ground), be sure to check guywire tension on a regular basis. One well-known contester had a TH6DXX on about 50'
One bracket about 3 feet below the peak of the roof (where the extension of both tower sides project onto the house). I used stock angle iron and U-bolts. Inside, 2x10 backing plate tied via cable t
OK, but how high is the roof. :-) Seriously, I (and I suspect others) am curious about the height of the bracket above the ground. 73 Malcolm KR4HP -- FAQ on WWW: http://www.contesting.com/towertalkf
Robert- Do you understand that you did not answer the question? I would like to know how high, also. Bill- W4BSG (Who also has a driving curiosity) Bill Aycock W4BSG Jackson County, AL EM64vr W4BSG i
to the needed. Base to bracket: 30 ft Above bracket: 10ft flat-top section. Above flattop: 10ft mast w/tribander Rotor (CDR-22) about 2ft below flattop One leg of dipole at 38ft. Base is 3-4ft below
Jeez, you guys must get very light winds. Towers like those listed above wouldn't last a week in GI. They wouldn't even last a day in the Winter time. Play it safe guys, put some concrete in the base