[TowerTalk] Re: Antenna element vibration damping - How

[Jan Erik Holm]

Jiri Sanda wrote:
,>
> To later responses.
> Jan - I would like to see some designs that DOES NOT vibrate at all. 
> Until now I have not seen such a beast !!!
> To kill the vibration with some rope or wire is fairly easy and does not 
> represent any significant cost or problem to put in.
> 
Yes I know. The first Yagi I built 30 years ago lost the elements after
just 2 weeks due to vibrations/resonance, was then fixed with ropes since
at that stage I didn´t know better.
These days I don´t need ropes since my elements doesn´t vibrate.
 >
> I would like to understand how rivets - no rivets can have the smallest 
> influence on vibration. With my dummy head I can not see any physical 
> reason.
 >
Me too!!! I never did say so. I didn´t like rivets due to other reasons.
 >
> Just according to my experience drilling a hole into the element is very 
> bad, but it is another story......
> 
Yes ofcourse it is but sometimes bad things has to be done, ofcourse
it will weaken the element at the point where the hole is.
 >
> During the years I have had quite a couple of various elements - right 
> know I (we - together with OK1RF) maintain close to 100 HF elements.
>
Yes I know you have a big installation, good luck with it.
> 
> 73 !
> 
> Jiri
> OK1RI
> 
73 Jim SM2EKM