You can get a decent estimate of what the potential benefit would be by
using HFTA, the free application that is included with any recent copy
of the ARRL Antenna Book. I have no idea what your terrain looks like,
but over flat ground it appears you'd get just over 1.0 db improvement
at lower angles (say less than 15 or 20 degrees) and maybe about 1.5 db
improvement at higher angles. That doesn't sound like much (and it
isn't), but every db counts on 80m. Only you can decide whether it's
worth the trouble to you.
73,
Dave AB7E
On 11/6/2010 8:42 PM, Edward Sylvester wrote:
> I have multiple antennas on a Hygain 70' Crank up Tower and a 10' Mast. The
> 80m Rotary Dipole sits on top at 76'. Have this yearning to raise the the
> 80m r. dipole so that it sits at 90' with the tower fully extended. The net
> gain in height would be 14'.
>
> Is this effort worth it? Will I gain much? Is this just plain crazy?
>
> Thanks for your input.
>
> 73,
> Ed NI6S
>
>
>
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