Gents, I have a pile of Rohn 25 that I'd like to use to support the ends of a 160 mtr dipole. No other load other than the tower itself. The center is supported by a TriEx freestanding tower. What's
Using the handy equations at http://home.earthlink.net/~w6rmk/math/catenary.htm or, more particularly, the 40m example at the bottom of the page and scaling up... assuming you use AWG 12 copper wire,
height is 40 feet - with a 1.5 ft^2 loading - no ice. Scott --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com]On Behalf Of KDM Sent: Friday, Novemb
1.5 sq ft @ 70 mi/hr is 19 pounds.. If tension is 40 odd pounds (see previous mail with catenary calculation), you're probably a bit overloaded... _______________________________________________ ____
OK - I was assuming that the dipole was going to be at the center and draped inverted V style. I didn't think about using multiple towers - guess that is what happens when I assume. When set up as an
Is this worth the effort? I think a top loaded vertical or inverted "L" would work much better. John KK9A Gents, I have a pile of Rohn 25 that I'd like to use to support the ends of a 160 mtr dipole.
I suggest that you taper the mast. I would go with ~20 ft of freestanding R25 (2 straight sections and 1 short top section) and then stick a 20'ft piece of 2" schedule 40 aluminum water pipe out the
Hello Ken I think you would over load that 40' when you climb it.20 to 30 feet of 25G is pretty shakey when your on top with no guys.Just my .02 cents. Joe K4XZ JOE PATRICK SENIOR PLUMBING/MECHANICAL
THe Rohn Catalog recommends temporary guys when climbing....but the big question is - how do you guy the top if you can't climb it? Hello Ken I think you would over load that 40' when you climb it.20
You would place the guys at the 20ft level. THe Rohn Catalog recommends temporary guys when climbing....but the big question is - how do you guy the top if you can't climb it? Hello Ken I think you w
That's why I recommend 20' of unsupported R25 followed by 20' of reinforced aluminum mast. I use a couple of rotator clamp shells on the rotator shelf of the R25 short top section along with an old T
If you raise the ends to the same height as the center, assuming it's 100' high or so, you will have a bi-directional antenna instead of an omni-directional one. You'll gain about 2dB's broadside and
question is - how do you guy the top if you can't climb it? You don't need temporary guys if the base is in concrete. With Rohn spec'ing guys every 33 feet or so, you're going to have 4 sections or s