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On Jun 26, 10:31*am, Cecil Moore wrote:
Welcome to the world of RF. On a long "ground" wire, the only place that is at "ground" is where it is grounded and at 1/2WL intervals. With standing waves on that wire, there are points at which the impedance (and voltage) is sky high - yes, on the "ground" wire. -- 73, Cecil, IEEE, OOTC, *http://www.w5dxp.com Thanks for the reply Cecil. I am aware of the physics of RF on longwires. What I am having trouble with is how to include a longwire RF energy sink at the source end of my antenna model. These are normally 1/4 wavelength at the operating frequency (or band midpoint for a best fit) and are open circuit on the far end resulting in a low impedance path for stray rf energy as part of the station ground configuration. Look back at Roy's reply on how to implement this in a model. The way he suggested would appear to have the source driving the 1/4 wave ground wire as an end fed element. Just doesn't look right to me. The source should only see this wire on the ground side of the model. 73 Dykes (AD5VS) |
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