The -2.2 db figure will change quickly every time you double the number of
radials even if they are only 50 footers. A better approach would be to
start out with putting down some expanded cooper mesh or even rabbit
fencing in a square around the tower. The rabbit fence is available from
most box stores.
Herb
On Tue, Aug 8, 2017 at 1:08 PM, Bill Straw via TowerTalk <
towertalk@contesting.com> wrote:
> The sunspots are gone and I need a better 160M transmit antenna. My
> previous Cushcraft MA160V
>
> over 50 X 50' radials worked OK for my expectations, but it had a very
> narrow bandwidth and the
>
> top loading coil would overheat with more than 500W and shift the resonant
> frequency so that
>
> the 2K-FA would go to standby. This antenna is for a new QTH.
>
>
> According to a Cebik article, a 160M inverted L over 4 x 50' radials has a
> -2.2 db gain. I think
>
> a -3 db gain would mean half the power would go into the ground? But if I
> were running 1500W I
> would still be better off from a transmitting standpoint compared to the
> old antenna?
>
> Thanks, Bill KO7SS
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