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Cecil, W5DXP wrote:
"Note that those are not the feedpoint impedances.". Well, the imprdance I qupted was the radiation resistance, which is the voltage to current ratio of an antenna at the maximum current point in the antenna. I was just too lazy to post the complete Table given by Bailey. Only when the order of resonance in a center-fed dipole is odd, 1st, 3rd, 5th, etc, is the feedpoint resistance the same as the radiation resistance. In odd-ordered resonances, the antenna feedpoint resistance is te same as the radiation resistance. In odd-orfered resonances, the antenna feedpoint is at s current loop. In even-ordered resonances, the value of the feedpoint resistance is equal to the feedpoint impedance squared, divided by the radiation resistance value. Bailey has worked it all out for us. Best regards, Richard Harrison, KB5WZI |
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