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Re: [TowerTalk] Polyamide (Stauff) Insulator Clamps

To: Byron Tatum <bjtatum1@att.net>, Towertalk Reflector <towertalk@contesting.com>
Subject: Re: [TowerTalk] Polyamide (Stauff) Insulator Clamps
From: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Thu, 18 Mar 2021 07:13:32 +0000
List-post: <mailto:towertalk@contesting.com>
I think the important point is the material they are made of.
As far as I know, PVC is good for that, since it is UV, electricity and 
moisture resistant.

But if your concern is the UV resistance, that is easy to improve, just apply a 
layer of poliuretane paint and it will last more than us.

73, Maximo





________________________________
De: TowerTalk <towertalk-bounces@contesting.com> en nombre de Byron Tatum 
<bjtatum1@att.net>
Enviado: jueves, 18 de marzo de 2021 4:50
Para: Towertalk Reflector <towertalk@contesting.com>
Asunto: [TowerTalk] Polyamide (Stauff) Insulator Clamps

Hello-    I am a little confused about the UV and electrical properties of the 
polyamide insulator clamps (hydraulic and tubing line support clamps) used on 
the VHF LFA yagis. I have viewed commercially produced VHF LFA yagis that 
utilized green colored ones to support 13mm tubing elements. I have read the 
black ones are better in regards to UV resistance. However, some antenna 
manufacturers state the black colored clamps have additional carbon in them and 
the antenna element lengths will need adjusting.    My head is nearly spinning 
after trying to research this. I have tried to look through the thousands of 
polyamide clamps in the Stauff catalog. Can anyone shed any light on whether 
the green colored polyamide clamps, such as used on an E-Antenna 6 meter 7 
element LFA yagi, are inferior in regards to UV resistance? I see where a 
competitor (making mostly HF yagis) states the black clamp assemblies they use 
are better in regards to UV resistance of the green ones that E-Antenna uses
 , but I wonder if the black clamps have identical electrical properties or 
would corrections need to be made to elements? I see where G0KSC, an authority 
on the LFA and their construction, offers the green colored clamps.   Thanks,   
Byron W5FH
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