[Antennas] Dipole Height

Richard (Rick) Karlquist richard at karlquist.com
Thu Sep 17 10:59:53 EDT 2015


On 9/17/2015 7:05 AM, David Robbins wrote:
> once you factor in the extra loss for the feedline needed to get it up that high the improvement will be negligible.
>

>
> Will my 40 meter dipole work better for DX at 90 feet above ground
> instead of 7 feet above?
>
>
> Jay...NE2Q
>

The loss of 90 feet of RG8 coax at 7 MHz is less than 1 dB.
As the owner of a 106 foot crank up tower with a 40 meter
yagi on top, I can tell you that the difference between 7 foot
height and 90 foot height is HUGE.  Much more than any
coax loss.  The 7 foot high dipole will make a nice NVIS antenna
for locals.

Rick N6RK


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