[TowerTalk] Insulated Rohn 25

[Dave Johnson]

I bought a stick of 1 1/2" solid fiberglass rod from Max-Gain Systems, Inc 
www.mgs4u.com .  I cut 3 pcs 9" long then cut down the diameter of 3" on 
each end leaving 3" in the middle at 1 1/2" diameter.  I drilled the holes 
in both ends of the fiberglass rod to match the holes in the 25G.  I put a 
short piece of old tower in the ground up side down with the fiber glass 
insulators installed then began stacking 130' of tower for a 160 vertical.

I used a small wood lathe to cut down the ends of the fiberglass but you 
can't use a cutting tool.  A good wood file or a course sanding belt will do 
the trick.  By all means, wear a breathing mask if you do this.

Dave - K4SSU


----- Original Message ----- 
From: "Terry Price" <w8zn at comcast.net>
To: <towertalk at contesting.com>
Sent: Sunday, March 15, 2009 11:12 AM
Subject: [TowerTalk] Insulated Rohn 25


>
> Hi all.
>
> I am planning a 4 square for 80m using Rohn 25 tower since I have lots of
> it. Besides the commercailly available insulators for $400 per set, anyone
> have any suggestions on insulating the tower at the base? I thought about 
> a
> sandwich using the standard flat base plate with a 1" thinck piece of 
> Delrin
> sitting on top another flat steel plate in the concrete. I would use a
> single stud with a BIG Delrin shoulder washer around it to keep the base
> from moving laterally. Since I have access to a small crane to lift the
> tower in one piece with the insulated guys already attached, I won't have 
> to
> worry about climbing until the base is secure and the guys are on.
>
> Any thoughts?
>
> Thanks,
>
> Terry
>
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