[TowerTalk] Insulating Tower for use as a Vertical

[Greg Gobleman]

Hi All,

Part of the message was a message that I had sent.  I have brought that info
home.  It did not use the cylindrical rods but used a flat plate mounted on
the bottom of a Rohn 25G section.  That article was published in CQ Magazine
November 1994 and the author is Bruce Clark, KO1F.  The plastic material he
used is 1" thick Tivar 100.  There are four photos in the article which
clearly show the installation.  I found it very interesting and cut it out
of my magazine and put it in a binder as a low budget solution for a
insulated tower.  Perhaps someone can get a comment from Bruce on how it has
worked out over a longer time.

73
K9ZM

----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>
Sent: Monday, August 14, 2000 6:14 AM
Subject: [TowerTalk] Insulating Tower for use as a Vertical


>
> There was a discussion on making one's own insulated tower sections
> using non-conductive cylindrical rods.  Unfortunately, I can't seem to
> find where I saved the information.  Several materials have been
> mentioned, including fiberglass, DELRIN?,  plexiglas, etc.
> Perhaps someone else has a better recollection of the preferred
> material.  Two other comments on this subject are copied below.
>
> Tom  N4KG
>
> # # # # # # #
>
> There was a few years ago an article in one of the magazines.  Most
> likely
> CQ or QST about doing some creative welding, pouring a concrete pedestal
> and
> using a dense foam and some kind of epoxy.  Sorry, all that info is at
> work.
> But if someone can tell you where to find that article, that would be
> great.
> If I don't see a message on the cluster in the morning, I'll look it up
> at
> work if I can get the time.
>
> The basic idea was to have 4 bolts coming up from the concrete pedestal
> upon
> which you would put this dense foam pad and then weld a flat plate to the
> bottom section of Rohn 25G.  Set that on top of the bolts with large
> holes
> in the plate which are then filled with an glue and more foam pads on top
> of
> the plate with large flat washers and a nut.  That way the plate only
> touches the foam pads and glue, not the bolts.
>
> Kind of neat.  I cut the article out for future reference.
>
> 73
> Greg K9ZM
>
> # # # # # # #
>
>
> A lot of talk about how to insulate...why bother. That's a lot of weight
> on insulators. Leaves the towers above ground during a lightning strike.
> Seem to recall (?) that Rohn doesn't sell the insulated sections any
> more. That's an interesting clue.
>
> You don't need to insulate. Just gamma match. You will be putting a good
> dense ground screen down, right? Connect the towers to the ground
> screens. Load the gamma match against the ground screens. Put in a
> regular ground system with rods to sink lightning strikes.
>
> - - . . .   . . . - -     .   . . .     - - .   . - . .
>
> 73, Guy
> k2av@contesting.com
> Apex, NC, USA
>
> # # # # # # # # #
>
>
>
> ________________________________________________________________
> YOU'RE PAYING TOO MUCH FOR THE INTERNET!
> Juno now offers FREE Internet Access!
> Try it today - there's no risk!  For your FREE software, visit:
> http://dl.www.juno.com/get/tagj.
>
> --
> FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> Submissions:              towertalk@contesting.com
> Administrative requests:  towertalk-REQUEST@contesting.com
> Problems:                 owner-towertalk@contesting.com
>
>


--
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com