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I could buy that to an extent I guess. But say if you had a top loaded vertical, with linear current distribution, the current across the coil should be appx equal no matter where the coil is placed. But if no top loading, maybe so.. MK Top loaded vertical does not have LINEAR current distribution, that is another simplification, fallacy. Current in the radiator has cosine distribution. At the base, there is not much difference, just like in cosine of the angle corresponding to the electrical length of radiator at that point. Again, this subject of current distribution is important in optimizing the antenna design by fine tuning the position of the loading coil in the antenna, combination with top loading etc. Morew current flowing in the radiating part of the antenna - the stronger the field and louder signal. The "linear" current distribution mentioned in ARRL Compendium and Antenna Book is the simplification propagated from Belrose's 1955 QST article. It is close, but not exact and introduces confusion as it is demonstrated by the flat earth society. Yuri, K3BU/m |
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