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Antennas ![]() |
80m ![]() |
NVIS Delta Loop ![]() |
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2020 |
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Measure Using old rolling scaffold aluminium tubes that are cut on 1.5m each. |
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Pulleys![]() Bought some ball bearing pulleys with extended swivels to support the Dacron ropes. |
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NVIS Delta Loop
The feedpoint of a full wave length (1 × λ ) loop has an characteristic impedance of approximately 100Ω. A horizontal loop with a circumference of approximately 83 m is a good NVIS antenna. PA1A is using a 1/4 λ stub matching the antenna to 50Ω |
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Hardware![]() Ceramic insulators from a former commercial broadcast station. |
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Center![]() Composing the center suspension point from the junk bin. |
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Suspension point Cutting 20, pieces DACRON wires for the pulleys |
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Wires Measure 3x28m for the corners of the triangle. |
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Connect![]() Using stainless steel wire clamps |
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Installation |
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Connector Finish: Burying the coaxial cable in the lawn |
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