On Thu,3/24/2016 3:15 PM, Brendon Whateley wrote:
Jim,
Can you toss a capacitive hat on the top of the shorter vertical and
see what difference that makes? I've not figured out how to use the
modeling software yet!
Now's a good time to learn. :) Modeling software like NEC is a great
way to learn about antennas.
I don't have time to do a model, but almost any top-loading is better
than bottom loading. My guess is that ONLY a cap hat won't bring a 4 ft
vertical to resonance without a loading coil, but depending on how big
the coil and hat are, it could be as much as 2-3 dB better than the coil
only.
73, Jim K9YC
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