Topband: Re Kinstar AM Radio Station Antenna Design

[Phil Duff NA4M & Ann Duff]

At 18:10 5/25/2006, Doug Waller wrote:
>Even a near perfect wire radial field close to the base of a single 
>vertical is inefficient due to half the fields around the radial 
>wires being in the ground.  This close-in loss, where power 
>concentration is high, can be eliminated or reduced by using solid 
>metal plate in lieu of wire radials, or by a using a Kinstar-fed cage.

What diameter or radius should this solid metal plate be to 
eliminate/reduce this close-in loss on 160M??

73 Phil NA4M


.--. .... .. .-..     _. ._ ...._  _ _
Phil Duff NA4M  &  Ann Duff
Georgetown, TX.