[TowerTalk] Radials vs vertical height

Thomas Giella KN4LF kn4lf at earthlink.net
Tue Apr 3 12:43:07 EDT 2007


Dave K4JRB Said:

The half wave inverted L is another good elevated performer sans radials.
Just bring the feedline at right angles to the L. (as close as possible)

I am wondering why hams like AA4NN get good results with 3/8 wave inverted
L's if the extra top part only pushes the signal upward.  Doesn't the max
signal move up the L in this antenna?  Certainly the vertical part needs to 
be as long as
possible.

Thomas KN4LF Says:

I'm currently using a 7/16 wavelength (240 foot) long inverted L with a 50 
foot vertical section on 160 meters. The highest current point is 
approximately 25 feet up on the vertical section on 1830 kc. I'm only using 
one 1/4 wave radial for the antenna to push against so to speak and have had 
very good reports with it on DX. You can read about it at 
http://www.kn4lf.com/kn4lf52.htm .

The higher in elevation that you pull the highest current point above the 
grounds surface, the lower the capacitive coupling losses are and the fewer 
radials that you need.

- -... ...- -,
Thomas F. Giella, KN4LF
Lakeland, FL, USA
kn4lf at earthlink.net

KN4LF SWL & Amateur Radio Autobiography: http://www.kn4lf.com
New Scientific Evidence for the Existence of God: 
http://www.cosmicfingerprints.com/audio/newevidence.htm




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