Topband: radial length

[Tom Rauch]

> That has been the belief in the broadcast industry for as 
> long as I can
> remember.  Every presentation at NAB and IEEE I have ever 
> listened to or
> read seem to support the thesis that a 50x50 or 100X100 
> piece of
> expanded copper mesh under a 90 degree tower AM broadcast 
> tower
> establishes the near field FSM normallty made at one mile 
> from the
> tower.

That's interesting because Brown Lewis and Epstein concluded 
a screen does nothing with an adequate field of radials.

We always used small screens around the tower base. It was 
mainly so people could work around the tower and equipment 
could be grounded to the screen (expanded copper mesh).

73 Tom