Icom AT-140 Instruction Manual - page 15
2001 NEW
2001 NEW
12
6
INSTALLATION EXAMPLE
RDANGER: HIGH VOLTAGE!
NEVER
touch the antenna element while tuning or
transmitting.
Antenna tuner location versus the strength of radiation from the same length of the
D
antenna element
When the antenna tuner is installed on the deck with the same element length connected.
Good — Horizontal
The antenna tuner is installed at a
higher position and the element is in-
stalled horizontally.
Better — Inverted-L
The element is bent in the middle as an
Inverted-L antenna.
Best — Vertical
If the length of the antenna element is
limited because of installation space, a
longer vertical element will give a lon-
ger communication distance.
Style of the antenna element connection versus the strength of the radiation from the
D
element
The vertical element should be connected at the end of the horizontal element.
Good — Long
The distance is longer between the
connection of the vertical element and
the end of the horizontal element.
Better — Short
The distance between the vertical element
and the end of the horizontal element is
shorter, compared with the one to the left.
Best — Direct
The vertical element is connected di-
rectly to the end of the horizontal ele-
ment.
Thickness of the Antenna element versus the strength of radiation from the element
D
The thickness of the antenna element does not change communication quality much, but it should be as thick as
possible for better radiation from the antenna element.
Good — Regular size
Better — Thick
Best — Thicker