Icom AT-141 Instruction Manual - page 14
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.
Good — Vertical
This is a good style. The vertical ele-
ment radiates waves, but the length of
the element may not be enough for HF
low band operation.
Better — Type-T
The antenna effective height is much
better than other styles. The higher
position of the Antenna tuner provides
longer communication distance.
Best — Inverted-L
This is the best style for HF low band
operation as the vertical element is
long, and the total element length is
also long.
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6
INSTALLATION EXAMPLE
2001 NEW
2001 NEW
Antenna element style versus the strength of radiation from the antenna element
D
When the antenna tuner is installed on the deck, the following installation may be possible. The antenna element
should be as long as possible, especially for the HF low band, such as the 8 MHz marine band.
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.
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.
RDANGER: HIGH VOLTAGE!
NEVER
touch the antenna element while tuning or
transmitting.