Icom AT-141 Instruction Manual

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10
INSTALLATION EXAMPLE
Style of the antenna element D
When the horizontal element is longer, or made with multiple wires, the effective height of the antenna is high and
communication distance may be improved.
Good — Vertical
This is a basic style with only the verti-
cal element. This style is not effective
for NVIS* communications.
Better — Inverted-L
This style is a good for NVIS* and lon-
ger communications.
Best — Two wire inverted-L
This is an even better element style
than the one to the left.
The following are antenna tuner and antenna installa-
tion examples for a non-sail boat.
They also explain both transmission and reception
performance, for your reference.
• Descriptions
Antenna
tuner
Vertical
element
Horizontal element
Good — High position
This antenna tuner unit position is bet-
ter than others but the length of the ver-
tical element is shorter than the others.
Better — Mid position
This installation is also good.
Best — Low position
This installation is perfect for the length
of the vertical element and the total ele-
ment length.
RDANGER: HIGH VOLTAGE!
NEVER touch the antenna element while tuning or
transmitting.
Antenna tuner location versus the strength of radiation from the antenna element D
The antenna tuner should be installed outside the vessel as high as possible.
However, the length of the vertical element should also be as long as possible.
* Near Vertical Incidence Skywave. This is a radio-wave propagation method that provides usable signals in the range between
groundwave and skywave distances (usually 30 to 400 miles, or 50 to 650 km).

Icom AT-141 Specifications

General

Brand	Icom
Model	AT-141
Category	Tuner
Language	English