I have been using Brite Zinc for about 5 years on my Rohn 55G tower in Aruba. The product is easy to apply and it dries hard. Unfortunately for me it gets salt blasted off in less than a year, howeve
I have seen the cables of crankup towers break pretty quickly in that environment. You didn't say what your application is. If there is not a lot of windload or height, perhaps an aluminum tower woul
Did you contact the manufacturer? Perhaps they sent you the gamma match for their 10m or 20m antenna. A short history and then to the question.... What a nightmare!!!! In 2004, AA6PW won a 3-element
This is a very tragic event and it must have been horrific for the father to witness. I have the same antenna and I installed it myself using a crane on a 160' Rohn 65G tower about a decade ago with
Why would the impedance change with a different driven element. The reflector and director lengths and spacing are not being changed and I thought that is what sets the impedance. If I remember corre
I would definitely check with one of the ARRL volunteer attorneys or the ham-law reflector on Hawaii's single 90' tower restriction. I recall KH7R having a number of towers. You might want to check o
How often did you have lightning damage before you added the porcupine? John KK9A Not true in my case. Before I installed the porcupine my mast bleed off the charge. A number of years ago I added the
I bought a Rohn TB-3 four years ago and when I received it and turned it by hand and it would often lock up. I returned it and got a replacement, which turned a little easier. I installed the bearing
IMHO the tower base designs that utilize some sort of undercutting/belled out at the bottom are stupid and potentially dangerous. In some designs the base is 6-9 feet deep and being that far down to
I've used dozens of the 58R-112S Polyphaser clamps and I don't think that $14 /each is unreasonable when protecting your system from lightning. The tower that I had in Illinois was hit by lightning n
Try a porcupine or rabbit's foot. Seriously, build your antennas strong enough to not get bend and don't worry about it. By thankful it's not a parrot chewing on your cables. Well here is a new wrink
The original question ( http://lists.contesting.com/archives//html/Towertalk/2006-07/msg00834.html ) inquired if the angle of radiation could be changed by adjusting the element lengths of 3 element
The original question ( http://lists.contesting.com/archives//html/Towertalk/2006-07/msg00834.html ) inquired if the angle of radiation could be changed by adjusting the element lengths of 3 element
The original question ( http://lists.contesting.com/archives//html/Towertalk/2006-07/msg00834.html ) inquired if the angle of radiation could be changed by adjusting the element lengths of 3 element
I'm not sure why my message posted three times when I only sent it once. Yes, I meant using an elevation or azimuth rotator won't change the angle of radiation. This is assuming level ground, if your
Using a release is a good idea, however I have never used anything. Concrete shrinks a little when it hardens and I never had problems removing wood forms. John KK9A <snip> One quick question for the
You may not feel the same in five years. 100' is a good for 20m most of the time but not for 10m during a sunspot maximum, where 30' to 40' may be significantly better. John KK9A Jim Lux and others h
I'm guessing that the earth was already disturbed from installing the 9 ft square x 1 1/2 ft. thick footing that the manufacture (AN Wireless) recommends. John KK9A ties, etc. and plywood for the for
We need more information. What is the material, wire or tubing? If wire, is it insulated or bare? If tubing, what taper schedule? Will it be installed horizontally or in a "V"? What height will it be
I use one at P40A to turn a homebrew 4el 20m (36 ft. boom) and a 2 element 40m Optibeam. Anybody out there with first hand experience using the Yaesu 2800 rotor? What kind of results have you guys ha