Topband: 160 meter 1/8 wave

[Dave Cuthbert]

Hi Doug, for now I will assume you mean an inverted-L with apex at 1/8
wavelength. Let's see what EZNEC shows for a top hat vertical at the
extreme against the inverted-vee. We can refine the model with more input
from you such as take-off-angle, top hat design and ground parameters. From
that a practical loading coil is added either at the bottom or at the top.

1.8MHz
*65' vertical* with top hat sized for a nearly square current distribution
6 x 20' top hat
Loading coil not required, antenna is resonant at 1.8MHz
32 x 130' radials plus 5 ohm GND loss added to try to account for NEC-2
0.005S/13 GND, "average"
Gain at a 10 deg take-off angle =* -2.5 dBi*

1.8MHz
Inverted-V apex at 65' with ends 10' above GND
0.005s/13 GND, "average"
Broadside gain at a 10 deg take-off angle = *-10.5 dBi*

     dave KH6AQ



On Thu, Apr 1, 2021 at 10:09 AM doug dietz <doug49707 at gmail.com> wrote:

> Is a 160 meter 18 meter vertical with hat equal or better than an inverted
> l over the same ground plane
> Doug. WD8Z
>
> Sent from my iPhone
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