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Re: [TowerTalk] Protecting Aluminum Antennas

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Protecting Aluminum Antennas
From: David Gilbert <xdavid@cis-broadband.com>
Date: Sat, 19 Mar 2016 08:53:51 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

I'm not advocating anodizing antenna elements, only disputing that it makes any difference electrically, Anybody not capable of abrading the anodizing at the joints shouldn't be putting up antennas anyway.

Dave   AB7E


On 3/19/2016 12:37 AM, J Chaloupka via TowerTalk wrote:
Anodize is an insulating surface coating.  Take it from there on what that 
means to joing the elements of an array electrically.JIM W4QBQ

       From: David Gilbert <xdavid@cis-broadband.com>
  To: Jim Miller <jtmiller47@gmail.com>; Larry Loen <lwloen@gmail.com>
Cc: TowerTalk <towertalk@contesting.com>
  Sent: Saturday, March 19, 2016 1:06 AM
  Subject: Re: [TowerTalk] Protecting Aluminum Antennas
That's not true at all.  Anodizing merely adds a dye to a very thin
surface oxide.    Aluminum oxide is going to grow naturally anyway, and
is essentially an insulator.  Skin effect doesn't apply to a surface
insulator.

Dave  AB7E



On 3/18/2016 8:07 PM, Jim Miller wrote:
Electrical resistance

On Mar 18, 2016, at 10:47 PM, Larry Loen <lwloen@gmail.com> wrote:

Yes, I have often wondered why annodized aluminum couldn't be used.  I
assume there is a reason.  But it would sure help make antennas less
conspiculous.


WO7R

On Fri, Mar 18, 2016 at 5:03 PM, David Gilbert <xdavid@cis-broadband.com>
wrote:

Why on earth would you want it to be shiny?  Seems like it would be more
of any eyesore to any neighbors that way.  It certainly doesn't make any
difference electrically.

Dave  AB7E


On 3/18/2016 4:06 PM, Roger (K8RI) on TT wrote:

Is there anything that will keep an antenna shiny and bright, besides not
putting it up?
I have often heard clear Krylon mentioned, but from my experience, it is
very short lived.  Three coats, allowed to dry between coats only lasted a
few months if that.
Around here (central MI) the shiny Al turns to a dull finish in a month
or two.

Alodyne does last and looks good, if you like a shiny gold color and have
both time and ambition.  I have used Alodyne on aircraft elevator hinges.
It's a very labor intensive (tedious) process. The antenna would certainly
stand out.


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