Topband: Short radials?

[Jim Brown]

It's important to note that this data is for AM broadcast towers, which 
in the time frame when this work was done, were mostly a quarter wave 
tall to 5/8 wave tall.  While it is considered the standard for that 
sort of antenna system and budget, it is not particularly relevant 
unless you have a quarter wave vertical and a lot of money to spend on 
copper.

The work by N6LF is far more relevant to the question at hand, because 
it looks at radials in the context of shorter antennas (as a fraction of 
a wavelength) that most hams use, and that this post asked about.

http://www.antennasbyn6lf.com/2010/03/relation-between-vertical-height-and-radial-length.html

73, Jim K9YC

  On 9/27/2012 10:14 AM, Richard Fry wrote:
> The measured data linked below shows how the number of buried radials 
> affects the performance of monopoles of various height to 90 degrees, 
> for an applied power of 1 kW.  Earth conductivity at the test site was 
> about 4 mS/m.
>
> http://i62.photobucket.com/albums/h85/rfry-100/BLandERadials.gif