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Yuri Blanarovich wrote:
wrote This long painful thread (it's been going on years now) started because K3BU claimed a loading inductor had most of the current in the first few turns. I am back after loooong absence here and see more misinformation coming from Tom, W8JI. I claimed that current in the antenna coil is NOT CONSTANT (or near) as he claimed. The case was of electrical quarter wave vertical radiator (as loaded mobile antenna) and that the current is distributed, varying across the coil as I have experienced, W9UCW has measured and Cecil has explained. Yuri, Why don't you explain in a few words how you think the loading coil works? Also, why do you think a mobile antenna is "90 degrees long" when it has a loading coil? The loading coil, if well-designed and of compact size, doesn't have to have any significant current taper. The exception would be if the antenna above the coil has small capacitance compared to distributed capacitance from the coil to space or to ground. Do you still disagree with this? 73 Tom |
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