[TowerTalk] yagi antennas breaking elements

[Richard Smith]

 Hello Jorge,
I have been using Hy-Gain monobanders, the 20, 15, and 10 meter models, for decades. The installation of ropes in the element tips really works for their designs. The tips are 7/16" O.D. aluminum tubing, and the ropes are 5/32" polyester. The ropes are very lightweight, and they dampen the oscillations enough to keep the tips from breaking.
The ropes add probably less than 1% to the weight of the yagis. The manual instructs the ropes to be 72" long, which extend from the end of a tip continuing inside the next larger telescoping section.
The 15 meter manual can be found at:
LJ-155CA.pdf (dxsupply.com)

Without the rope installed, the 15 meter Hy-Gain yagi tips break within a year or so. With the rope installed, I have not had a tip break after 10 years.
73, Rich, N6KT/PJ4K
    On Tuesday, January 17, 2023 at 01:46:03 PM PST, Jorge Diez - CX6VM <cx6vm.jorge at gmail.com> wrote:  
 
 hello

I have had a problem with my M2inc antenna, 15M6DX over the years.

I has 6 or 7 times different elements tips beaking, really is
unbelievable that this happen, and seems is worst now, actually I have 3
tips broken in the last weeks

I am in a windy location, maybe the vibration is causing this.

What will be a solution for that?

I heard about a rope inside the elements, but will add weight to it

Others are using expanding foam

What do you think about that?

thanks in advance!

--
73,
Jorge
CX6VM/CW5W
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