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Antennas |
4-element 7 MHz OWA 52ft Boom |
Reflector, D1 and D2 |
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2009 Click on the images to view at 800x600 |
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Center of the elements are the same as the driver element. The reflector, D1 and D2 are not insulated. Cutting all segments before assemble. |
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Center tubes segments 1 and 2 (R, D1 and D2) are ready. Smoothing the edges using a angle grinder with sanding disk. |
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Deburring the ID tubes |
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Cutting the different sizes and using my lathe to make the adapter rings of segment 3 (40/35 donut) |
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Decreasing the OD with 0,5mm on my lathe (0.019''). |
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Tube segment 7 (22/16) needs to fit into segment 6. making donut 22/16 by removing 0,3mm Segment 7 fits into segment 6 |
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Mineralised Methylated Spirits is a virgin alcohol prepared for industrial use. Suitable for use as lubricant when decreasing aluminium tubes on the lathe. Commonly known as Denatured Alcohol, Ethanol (Ethyl Alcohol) is mixed with a small quantity of Methanol to make it unfit for consumption. |
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Tapping screw threads for segment 1. Before installing the elements, In will lock the M8 with Nordlock washers. |
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Before installing the elements, In will lock the M8 with Nordlock washers. These specilalized washers are only available at a professional dealer. |
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Overview M8 with Nordlock washers. |
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