Pardon me, but this looks like a disaster watching for a place to happen.
Bill--W4BSG
-----Original Message-----
From: w2ttt@att.net
Sent: Monday, September 01, 2014 11:22 AM
To: Stan Stockton ; Grant Saviers
Cc: Gordon Beattie ; towertalk@contesting.com ; comtechgroup@yahoogroups.com
Subject: Re: [TowerTalk] [Bulk] Re: tower insulators
Stan,
So you use 3/8 fiberglass rod into each leg and the rods go into the
concrete?
If you have photos, that would be helpful.
73,
Gordon, W2TTT
201.314.6964
Sent from Samsung tablet
-------- Original message --------
From: Stan Stockton <wa5rtg@gmail.com>
Date: 2014/09/01 11:35 (GMT-05:00)
To: Grant Saviers <grants2@pacbell.net>
Cc: "J. Gordon Beattie, Jr., W2TTT" <W2TTT@ATT.NET>,towertalk@contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: tower insulators
I have four 60 foot 25G towers that have a solid rod of fiberglass in each
leg. These towers were in guyed for several years in a pretty harsh
environment on top of a mountain. After having grade. 8 bolts break several
times I then bridged the upper and lower sections on each leg with a piece
of fiberglass plate which is something like 4 inches wide, a foot long and
about. 3/8 thick. It is held with galvanized. U bolts. After seeing the
towers bend in about a. 60 mph wind, I used 3/8 fiberglass rod to guy them
to small, homemade anchors - rod welded to a short piece of angle. Each
anchor is in about a bag of Quickcrete.
Sent from Stan's IPhone
On Sep 1, 2014, at 10:12 AM, Grant Saviers <grants2@pacbell.net> wrote:
The max wind combined guy loads for a 100' tower can be around 4000#
downforce on the tower base (plus the tower weight) so something more than
1" delrin will be required between the legs. That amount of force
obviously works ok with the tapered pier pin base, but the leg span of
straight R25 or larger will require some steel structure behind whatever
insulator is used. I think modifying a tapered pier pin base section
bottom plate for an insulator block of delrin/nylon would be
easier/cheaper.
Grant KZ1W
On 9/1/2014 7:29 AM, J. Gordon Beattie, Jr., W2TTT wrote:
Bob, Steve et al,
Any thoughts on what might be a good approach to insulating a Rohn 25
tower
from the ground?
I was thinking of a pin base in a lower slab of nylon or delrin
insulating
material sandwiched with another upper slab of insulating material that
has
bolts into the tower legs. These could be bolted together at the
corners.
When I say, "slab" I am thinking about 0.5-1.0 inches in thickness.
My concerns are that the might be stronger and possibly cheaper. Any
thoughts?
73,
Gordon, W2TTT
201.314.6964
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Bob
Naumann W5OV
Sent: Saturday, August 30, 2014 2:33 AM
To: Steve Maki
Cc: towertalk@contesting.com; 'Bob Naumann W5OV'
Subject: Re: [TowerTalk] tower insulators
The insulators that you found through an obsolete link are no longer
available.
Sorry!
Bob W5OV
Array Solutions
On Fri, August 29, 2014 9:16 pm, Steve Maki wrote:
John,
Thinking about it, of course I've been thinking about it for a few
years now :)
Yes, I saw the Array Solutions solution, and WB0W's, both of which
look viable. I only tried contacting them via their web page contact
gadgets which aren't always monitored by online stores.
I'll try a direct email, thanks.
-Steve K8LX
On 8/28/2014 9:45 PM, john@kk9a.com wrote:
Are you getting back into contesting Steve? What about these?
http://www.arraysolutions.com/Products/towerinsulators.htm
Try emailing W5OV, BonN@arraysolutions.com
From: Steve Maki <lists@oakcom.org>
Date: Thu, 28 Aug 2014 18:24:33 -0400
Does anyone know if there is a currently available commercial leg
insulator for Rohn 45 tower? I've seen reference to products from
Array Solutions and WB0W, but didn't get replies to my inquires, and
I'm guessing they were/are not big sellers.
I can fab them myself from fiberglass rod and protect them with an
umbrella of some sort, but would rather save the time with an off the
shelf product.
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