You don't say if the antenna is vertically or horizontally polarized?

If horizontal, then many other factors come into play.

If vertical, then the number of radials is important, and the angle at which
they descend from the ground point.

In the latter case, usually four at a downward angle as they usually play a
part of the supporting guys.

In the former case, it largely depends on the type of earth on which you are
based.


This is a very simplistic take, and no doubt others will have other points
of view which may lead to a useful discussiion!
73

David W Wood 

-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Mark
Sent: Thursday, July 31, 2014 4:04 PM
To: [log in to unmask]
Subject: Changing Quarter wave formula to match Height above ground

Hi
 
My understanding is that the standard formula 234 divided by the frequency
in MHz is for a quarter wave mounted a half wave above ground. Will I need
to make the antenna longer or shorter as it gets closer to ground? To be
honest my antenna is about a 1/6 wave above ground. I am thrilled to get it
that high. It was laying directly on earth for about a week. Smile.
 
God bless,
Mark