Re: [TowerTalk] Change in Frequency As Antenna Height Rises

["john@kk9a.com" <john@kk9a.com>]

Interesting. I trust antenna modeling but I wonder why linear loading is
less influenced by the ground.  I also wonder if coil loaded elements
react the same.

John KK9A


Re: [TowerTalk] Change in Frequency As Antenna Height Rises
from [Dan Maguire via TowerTalk]        [Permanent Link][Original]
To:     <towertalk@contesting.com>
Subject:        Re: [TowerTalk] Change in Frequency As Antenna Height

100% length (69.79 ft), no loading, +218 KHz change from 30 ft to 60 ft.
85% length (55.93 ft), 3.297 uH coils, +137 KHz change from 30 ft to 60 ft.
70% length (46.06 ft), 6.721 uH coils, +78 KHz change from 30 ft to 60 ft.

So it seems that more loading results in less change in resonant frequency as
the height above ground is varied.

Dan, AC6LA

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