[TowerTalk] Insulated Rohn 25

[Mark Robinson]

I have heard that G-10/FR4 rod can be machined to make good insulators. 
There are some places on the web that will sell you the rod and also can do 
the machining for you

http://www.jjorly.com/g10_rod_rods.htm

http://www.professionalplastics.com/G-10FR4ROD




----- Original Message ----- 
From: "Terry Price" <w8zn at comcast.net>
To: <towertalk at contesting.com>
Sent: Sunday, 15 March, 2009 10:12 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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