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Cecil Moore wrote: Jim Kelley wrote: I'd like to hear an explanation for ANY current difference across a coil that is supposedly behaving as a lumped inductor. But the test really should be for the same type of antenna used in Yuri's discussion; Jim, did you fail to notice that arc-cos(0.95) = 18.2 degrees? No. But I have failed to notice any explanation for it other than you and Yuri have provided. 73, Jim AC6XG |
#2
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Jim Kelley wrote:
Cecil Moore wrote: Jim, did you fail to notice that arc-cos(0.95) = 18.2 degrees? No. But I have failed to notice any explanation for it other than you and Yuri have provided. Assuming the forward current and reflected current are in phase at the feedpoint, the 5% reduction in net current at the other end of the coil appears to be because the forward current and reflected current are not in zero phase at that point. The phase of the forward and reflected currents are changing in a predictable manner but the phase of their sum, the net current, doesn't change much if they are in the ballpark of the same magnitudes. I think Roy measured that net current phase. -- 73, Cecil, W5DXP |
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