C. Dwight Baker wrote: Good Morning and Merry Christmas to all the brave souls defying their XYLs to answer this request. I have installed 105 feet of 4 inch PVC from my shack to the tower. My questi
Jim, You might consider "Stuf", the Teflon grease that you fill the inside of the connector with. With PL259s, I would carefully tape, in advance, the back end of the connector/jacket junction, and t
Here's a little trick for making a "close visual inspection": Before screwing the PL259 onto the coax, pop out the center pin/dialectric combo by inserting a small blunt object, like a small nut driv
There's a tower manufacturer in Iowa which isn't well known in the ham market but deserves a look by anyone contemplating an R45/R55 class guyed installation. Sabre Communications - http://www.sabrec
Hi Bill, I would think a *cradle* made out of a pair of 8' or 10' chokers would work, as long as you can get one of them out just past the current center of gravity. Even if you don't quite make the
Actually, it's available in a number of sizes, and 5/16" is popular for guying ham towers (although 3/8" is more common). Strength-wise 3/8" rod is halfway between 5/16" EHS (11,000 lbs) and 3/8" EHS
Since this has been discussed extensively before, I hesitate to ask this.... But I would really like to see an example (with a little analysis) of a self support structure of ANY kind that is comprom
I sure haven't seen them. Yes - with guys you convert almost ALL of the bending moment into guy tension and straight downward force. The numbers (on a simplified model) don't give any support to the
Hey, smashing idea. Just don't make the antenna TOO strong, or it might appear to the tower to be a "guy" wire ;) Steve K8LX _______________________________________________ See: http://www.mscomputer
So it's claimed. If you look at the numbers, the increase in downward force is insignificant, compared to leg strength and to what the down-wind leg experiences in the un-guyed state. Steve K8LX ____
One man can unroll even a 5000' roll of rod - easy. The key is to NOT "unroll" it, but leave the coil laying on the ground, and feed it through a nearby elevated *eye*. My *eye* is an 18" long piece
OK. In the case of the thread subject, I still don't see the worry. The change in stress distribution is mainly one of relief. What component of the tower can see an increase in stress? The very top
Good example - just the type of thing I was looking for, except that it has so much flex that it's wind area is reduced (through extreme bending) way before failure. Heck, the tip may hit the ground
Guy wire is normally pre-tensioned at 10% of minimum breaking strength. Some of what you wrote is conjecture, just like my theory is. Just think of this as an academic exercise then. If it turned out
This is the question I'm interested in. Because if it turns out that it's difficult to design even a ridiculous structure that is weakened by guys, some good light will be shed. It seems to me that a
Of course. But that's not what were on about here. It's a reaction to the oft repeated flat out statement that guying compromises the integrity of a self supporter, without, AFAIK, a single documente
tube. without an Err, no. Keep in mind the concept of "sensible guying" it and a push Again, this isn't sensible guying. Steve K8LX _______________________________________________ See: http://www.msc
Just for the hell of it, I looked around the garage and spied a few scrap pieces of 1/2" & 5/8" 6061 aluminum, so did a crude experiment. In a large vise I clamped a short piece of 5/8" tube, vertica
Errr, how about a self supporter that's already installed? Commercial towers are beefed up all the time when load requirements change. Adding guys to an existing tower should not be rejected out of h
Jim, Thanks for going through those calcs, it's much appreciated. Just a couple of questions: Why did you choose 60% guy anchors instead of the commonly recommended 80%? I agree though that 60% is pr