[TowerTalk] Polyamide (Stauff) Insulator Clamps

[Máximo EA1DDO_HK1H]

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





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De: TowerTalk <towertalk-bounces at contesting.com> en nombre de Byron Tatum <bjtatum1 at att.net>
Enviado: jueves, 18 de marzo de 2021 4:50
Para: Towertalk Reflector <towertalk at 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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