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Bob, I remember Marconi once asking if you had any thoughts about replacing the radiator with a 1/4 wave section (eliminating the capacitance hat). Even if you haven't experimented physically with the idea, have you any theories on that ? My "Top One" has a swr of 1.00:1 using 12' increments of polyethelene dialectic coax. (72' of RG-214) I basically used Avanti's instructions and as I mentioned earlier used UV resistant ties to support the hoop to the mast to prevent swaying.