Graham Brock, Inc.
Broadcast Technical Consultants
www.grahambrock.com
AM Ground Systems
Land Requirements for AM Ground Systems
Use the formula at the bottom of the page to determine the approximate amount of land
required for the ground system per standard guyed AM tower. Below
are examples of a typical ground system for a single tower and two
tower installation.
This is for estimating purposes only and should not be
considered "Set in Stone" figures. The online form below is for up
to a 3 tower array. The calculation is based on STANDARD
installations of up to 3 towers, inline only with 90° spacing.
With multiple tower arrays there are too many variables involved to be
able to use a standard calculation formula. Please
contact our office for more information.
Where:
Frequency (MHz) = Frequency (kHz)/1000
Wavelength = 984/Frequency (MHz)
Acreage = (Wavelength/2)/43560
1 Acre = 43,560 Square Feet
Or use the online form
below:
Please note, this is for estimating purposes
ONLY! Graham Brock, Inc. assumes no
liability or assurances of the information
provided below. Please contact your Tower
Contractor for exact figures. This is to
be used only as a guide. Check with your
local zoning Commission about tower height
restrictions, fall radius and / or any other
local requirements.
AM Ground Radials and
Buildings:
The diagram to the left
illustrates how to route your AM Ground Radials around a
building.
Install a 4" Copper ground strap all the way
around the building. Install 8' ground rods at
approximately 6' intervals and Silver solder each connection
point.
At the point where a ground radial intersects with the 4"
strap, silver solder it at that point and then move to the
other side of the building and silver solder the ground
radial to that side of the strap (at a point that would be
straight in line if the building where not there).
Continue the ground radial to the edge of the property or to
the calculated end point.
