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Re: [TowerTalk] Has anyone every put up a V-beam?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Has anyone every put up a V-beam?
From: dw <bw_dw@fastmail.fm>
Date: Thu, 17 Sep 2015 08:02:21 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks Ken,
I didn't realize the aluminum stuff would stretch.
They have it at lowes for electric fence wire, so I was assuming the
stretching would be pretty much identical to steel wire.
I can use steel wire and braze connectors onto it.
Maybe that would be a safer bet that aluminum.
Do they make a copper coated electric fence wire?
I do have copperweld type wire for building wire antennas, but wasn't
sure I would use it for this project.
Don't think I have enough to do both sides.
So I thought electric fence wire would be quick and easy.
Duane


On Thu, Sep 17, 2015, at 04:50 AM, Ken wrote:
> Patrick,
> 
> Okay.  You just said aluminum fence wire. I've used that for fencing and 
> it stretches pretty bad.  Steel core, aluminum coated would be different 
> although myself I would go with copper coated (copperweld type).
> 
> 73,
> Ken WA8JXM
> 
> On 9/17/15 7:15 AM, Patrick Greenlee wrote:
> > Aluminum coated steel wire is commonly used for electric fences. 
> > Although proper practice is to install it with low tension (as per 
> > vendor and MFG) that is not because of any failing in the wire's 
> > strength or resilience. It can take significant tension and last a 
> > good long time.  One issue is the skin effect.  Your lowest frequency 
> > of interest will penetrate into the wire to the greatest depth. You 
> > will get better performance if your skin depth does not exceed the 
> > thickness of the aluminum outer layer.  I cant quote the formula for 
> > skin depth from memory but it is readily available.
> >
> > There has been a lot of this aluminum coated steel wire used for 
> > antennas with good success.
> >
> > Patrick        NJ5G
> >
> > On 9/17/2015 5:46 AM, Ken wrote:
> >> Aluminum fence wire stretches easily under load.   It needs to be 
> >> supported every ten feet or so, not ideal for long wire antennas.  I 
> >> won't even use it for electric fences ;-)
> >>
> >> Ken WA8JXM
> >>
> >> On 9/15/15 3:45 PM, dw wrote:
> >>> I think I'll pick up some aluminum fence wire at Lowes tonight on the
> >>> way home from work. 
> 
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-- 
 Bw_dw@fastmail.net

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