kopia lustrzana https://github.com/miguelvaca/vk3cpu
Update magloop.html
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<li>c/a : is the spacing ratio; based on 'c' being the inter-winding spacing for multi-turn loops measured between conductor centers, and 'a' is the conductor diameter. (Must be >= 1.1)
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A low-value will increase the resistance due to the proximity effect. (Ignore for single-turn loops.)</li>
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<li>Tx : The transmit power in Watts. This affects the predicted voltage across the capacitor (Vcap), and the RMS loop current (Ia).</li>
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<li>Re : Additional resistance due to external losses, due mainly from capacitor contact resistance and proximity-to-ground effects. Use Re=0.0 to assume the loop is in free-space.
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Adding Re will reduce antenna efficiency, Q, Vcap and Ia, while increasing BW.
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According to [1] and [2], a 1 m diameter loop of 22 mm copper tubing at a height of 1.5 m above the ground at 7 MHz had a calculated capacitor contact resistance of ~190mΩ
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and an additional ground proximity loss resistance of ~30mΩ. Note that ground losses are dependent on both frequency and height-above-ground.</li>
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<li>Re : Additional resistance due to external losses, due mainly from capacitor contact resistance and proximity-to-ground effects.
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Use Re=0.0 to assume the loop is in free-space with no capacitor losses (i.e. ideal conditions, with loop-related losses only).
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Adding Re will reduce antenna efficiency, Q, Vcap and Ia, while increasing antenna BW.
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According to [1] and [2], a 1 m diameter loop of 22 mm copper tubing at a height of 1.5 m above the ground operating at 7 MHz had a calculated capacitor contact resistance of ~190 mΩ
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and an additional ground proximity loss resistance of ~30 mΩ. Note that true ground losses are dependent on both frequency and height-above-ground.</li>
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<li>Metric or Imperial : selects the measuring system.</li>
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<li>Cu or Al : selects the type of metal conductor (annealed copper or aluminum).</li>
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<li>Circ, Oct, Hex or Sqr : selects the shape of the magloop.</li>
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