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Jim Kelley wrote:
Cecil Moore wrote: That's why total current cannot be used to measure a delay through a coil in a standing-wave antenna. Not even if the frequency is known and there's a standing wave current loop at one end of the coil and a standing wave current node at the other end? Total current phase is the context of my posting above. We were talking about total current phase, not total current amplitude. To be precise, the statement should read: "That's why total current phase cannot be used to measure a delay through a coil in a standing-wave antenna". It is difficult to post context-free English. W8JI and W7EL both used standing-wave current *phase* to try to determine the delay through a coil. That is an invalid measurement concept. If they had used the standing- wave current amplitude instead to calculate the phase shift, they would have gotten much closer to a valid result. But they are arguing about current amplitude drops which are simply relative phase shifts between the forward and reflected current. -- 73, Cecil http://www.w5dxp.com |
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