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Antennas |
4-element 7 MHz OWA 52ft Boom |
Element 2 Boom Clamps |
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September 2009 Using Fe instead Al. My initial idea is to copy an professional rugged clamp. U-profile measuring 250x50mm (10''x 2'') |
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Cutting the angles with a Jigsaw instead of an Angle grinder. Using the right blades for 4mm Fe (0,6'') will do the job. |
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For safety reasons, always make a smooth clamp. During antenna work you you will appreciate it. 8 blokcj |
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Using a 3'' (90mm) boom. As you can see, this is the way how the clamps are constructed. Using 4 boom plates and welding the paret together. |
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Locking and adjustingn the parts before welding |
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Over the full lenght, top and bottom and the clamps and U-plates are welded. This will provide the total stiffness of the element2boom clamps |
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4 element2boom clamps are ready for drilling. Starting the element with 60mm (2.5'') in center. |
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Drilling with 14mm holes (1,8''). After galvanizing 12mm will be used to fasten the bolts. |
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Drilling the holes for the center element using a wooden template with pre-drilled holes for marking the holes with a marker. |
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I like to use rugged pipeclamps for all antenna designs. |
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Ready designed element2boom clamp with 2.5 and 3'' pipeclamps. The driver has not to be mounted on the boom, therefore antother system will be used.
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2.5 and 3'' pipeclamps.
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