One way of achieving lots of top "capacity loading" is to stick a
remotely tuned mobile whip on the top of the vertical. When it's below
resonance it's capacitive and variable. In the 1970s a local ham
designed the equivalent of today's "screwdriver" and used it to top load
a 25ft vertical aluminium pole for 160m. I don't know why I never hear
this suggested these days.
73,
Steve G3TXQ
Jim Brown wrote:
> YES! The problem, of course, is that you may need both, in which case I
> would use as much top loading as possible (multiple wires, longer) and add
> some inductance near the top of the vertical section if needed. This is my
> gut feeling, not based on modeling.
>
> 73,
>
> Jim K9YC
>
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