You are only partly right, Bill. The issue was not negligence. That issue had been taken out of the mix with the advent of Manufacturers Strict Liability in Tort beginning with the Yuba Power case in
Nice response Jim. One comment regarding the statement that "The composite wave strength may be greater or less than that from the driven element alone. . ." This may be true in the sense that the fi
Well it is not a T-match, Pete. A T-match does not have a split driven element and th ends are indeed attached tot he driven element. Doesn't sound like a Beta match either since there is no direct c
Bill It is a very clever arangement which is consistent with my last post. I think I would prefer to use a 1:1 balun for the feedpoint, however, rather than what is essentialy a common mode filter ma
Bob You do not give the dimensions of your roof. I will say, however, that my experience with the metal roof was very good. I had a 40x50 metal shop in Ellensburg that I mounted a pair of verticals o
Allen There are two primary issues to consider between steel and aluminum. They are torsional rigidity and yield strength. Since aluminum has about 1/3 the Young's modulus of steel it will require a
Frankly Pete I have found these comments neither "useless" not "crap." Yours, on the other hand . . . 73 Bill W7VP -- Original Message -- From: <HFDXJUNKIE@aol.com> To: <towertalk@contesting.com> Sen
Since August 9 I have received 375 posts on this forum. I stopped counting when I got past 100 that arguably did not relate to the theme of this reflector. Use of inflammatory language with respect t
Jim This is still measuring it with a micrometer, marking it with a piece of chalk and cutting it with an ax. 73 Bill W7VP You've already paid for it... http://aa.usno.navy.mil/data/docs/topocentric.
This is my third try at getting info on the Create RC3-5 conbtroller. Mine is not working properly. I hope there is someone out there who can direct me to a schematic and instructions for the thing.
My warmnest thanks to those who sent me information on the Create RC5-3 rotator controller especially those who emailed the instruction manual and the contact infomration for Create in Japan. As sugg
There is actually more to it than that Jim. Whenever there is a combination of a spring, a mass and a dampening source there is the prospect of dynamic oscillation. In so cases the potential oscillat
Thanks for your insight Steve. Now if you would please provide us with a similar analysis in the buckling modes. It may take a bit more math (differential equations?) but the thought experiments ough
The following was Steve's question to me and my response which was snet off the reflector. Steve said:"Bill, Are you an engineer? If so, can you devise a case, using a reasonable tower and guy system
Steve First I did not claim to be an expert. Quite the contrary. I am only one who has doubts on the basis of my experiences. At one time many years ago I had a free standing Universal tower made fro
Hi Roger Let me summarize the loads on the tower. Remember that in the equilibrium condition the sum of the forces and the sum of the moments have to equal zero. 1. Compressive load from the weight o
Hi Steve Your way is much better of course if you can run the double guys. The only benefit of running the single guy to a "Y" is that the resulting force vector associated with the twisting moment i
Jim If you are referring to the Rohn TA45 then that is exactly what I have done using angle sections only I have placed the torque triangle at the location of the rotor since that is where the twisti
Hi Bud: "With horizontal guy wires, high winds add no downward force on the tower legs; the only downward force at *any* time is dead weight of the tower and the antenna (which you already have in yo