[TowerTalk] Re: Antenna element vibration damping - How

[on4kj]

----- Original Message -----
From: "Jan Erik Holm" <sm2ekm at telia.com>
To: <towertalk at contesting.com>
Sent: Monday, August 11, 2003 8:49 AM
Subject: [TowerTalk] Re: Antenna element vibration damping - How


>
>
> 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.

***
****  Some still vibrate after 30 years...... HA HA HA.
***

> > 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
>
>
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>
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