[BC] Carl Smith method of dual ground system

[Barry Mishkind]

Roy,

Did Carl ever publish on this?

barry

At 08:20 AM 2/12/2006, RSTYPE at aol.com wrote
>We have used a tuned counterpoise type ground system in rare occasions when
>short towers dictate the need for a good ground system and there is 
>not enough
>land available at the site to accommodate one.  This involves installing both
>a standard buried short ground system and an elevated one around the tower.
>The elevated ground system is not connected directly to ground but, 
>instead, is
>tied to a buss at the tower end of the radials and then connected to ground
>through a tuning circuit (normally a vaccuum capacitor).  This tuning network
>is then adjusted to resonate the elevated radials against the buried ones to
>maximize the current at the tower end of the radials.  I've never really dug
>into the theory behind this, but I know that Carl Smith used this technique
>successfully in the 60's for an AM antenna system in Alaska 
>(Barrow?) where the
>site restrictions required the installation of a very short tower 
>and prevented
>the installation of an adequate traditional ground system.



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