Goto Section: 1.30000 | 1.30002 | Table of Contents
Revised as of October 1, 2019
Goto Year:2018 |
§ 1.30001 Definitions.
For purposes of this subpart:
(a) Wavelength at the AM frequency. In this subpart, critical distances
from an AM station are described in terms of the AM wavelength. The AM
wavelength, expressed in meters, is computed as follows:
(300 meters)/(AM frequency in megahertz) = AM wavelength in meters.
For example, at the AM frequency of 1000 kHz, or 1 MHz, the wavelength
is (300/1 MHz) = 300 meters.
(b) Electrical degrees at the AM frequency. This term describes the
height of a proposed tower as a function of the frequency of a nearby
AM station. To compute tower height in electrical degrees, first
determine the AM wavelength in meters as described in paragraph (a) of
this section. Tower height in electrical degrees is computed as
follows: (Tower height in meters)/(AM wavelength in meters) × 360
degrees = Tower height in electrical degrees. For example, if the AM
frequency is 1000 kHz, then the wavelength is 300 meters, per paragraph
(a) of this section. A nearby tower 75 meters tall is therefore
[75/300] × 360 = 90 electrical degrees tall at the AM frequency.
(c) Proponent. The term proponent refers in this section to the party
proposing tower construction or significant modification of an existing
tower or proposing installation of an antenna on an AM tower.
(d) Distance from the AM station. The distance shall be calculated from
the tower coordinates in the case of a nondirectional AM station, or
from the array center coordinates given in CDBS or any successor
database for a directional AM station.
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Goto Section: 1.30000 | 1.30002
Goto Year: 2018 |
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