[BC] Ground systems

[Barry Mishkind]

At 08:20 AM 2/12/2006, RSTYPE at aol.com wrote
>Based on Dr. Brown's work in the 30's, the ideal ground system would 
>be 113 radials
>(which has been increased to 120 for the convenience of a nice round number)
>located on the surface of the earth.

         According to Brown himself, the 113 number came
         from him running out of wire for the grounds at 113.

         Various early applications also specified 113, following Brown,
         and it appears the FCC did round up for convenience.

         There are some graphs/charts around showing the
         point of diminishing returns in adding more radials.
         I can't put my finger on it right now.




_______________________________________________________________________
Barry Mishkind     -       Tucson, AZ    -   520-296-3797