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[TowerTalk] durability

To: <towertalk@contesting.com>
Subject: [TowerTalk] durability
From: wy6k@yahoo.com (michael watts)
Date: Wed, 28 Mar 2001 19:21:20 -0800 (PST)
Sure seems right to me.  What was F12's complaint
about putting rope in their antennas?

Mike
--- Tom Rauch <w8ji@contesting.com> wrote:
> > mph. Most urban areas are built in low wind
> locations. The problem
> > arises when the average wind is high with day
> after day of winds over
> > 30 mph. We have had people make statements that
> Force 12 elements
> 
> My location is middle western Georgia, although my
> antennas are 
> in a clear area and above the tree lines. It is the
> mild breezes that 
> set my antennas elements into vibration.
> 
> > don't vibrate and therefore don't need rope in
> them or will not fail
> > from wind induced vibration. I know this is false
> because if you take
> > an element and swing it around you will hear and
> feel the vibration
> > from the element. 
> 
> I know it is false because on any day when the
> breeze is over 
> maybe ten MPH, I can hear the antenna elements
> vibrating. Since 
> the antennas are 30 feet or more apart, there is no
> mistaking (when 
> on the tower) which antennas vibrate.
> 
> It seems silly to have a disagreement about this,
> because adding 
> rope INSIDE the element can't possibly change the
> ice loading or 
> wind loading of the element. It might not do any
> good, but it 
> certainly can't do any harm to the antenna.
> 
> From here on out, I'll never install another antenna
> without rope 
> dampers and end caps. I've learned my lesson.
> 
> 
> 73, Tom W8JI
> W8JI@contesting.com 
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