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Noise
typically
shows on the sonar
display.
If interference
begins
at
slow
boat
speeds
and
gets
worse as the
speed
increases,
then the
probable
cause is acoustic noise or cavitation. This
noise is not electri-
cal,
but is caused
by
air bubbles
passing
over the face of the trans-
ducer. It's
easy
to determine if this noise is
electrical or cavitation.
Stop
the
boat,
put
the
engine
in
neutral,
and increase the
rpm.
If
the
noise
increases,
then it's electrical.
If it doesn't show on the sonar's
display,
then the
problem
is cavitation.
To solve this
problem,
the
transducer must be moved
out of the turbulent water flow or
adjusted
so that smooth water flows over
it at all boat
speeds.
The Z-9500
has reverse
polarity protection.
No
damage
will occur to
the unit
if
the
power
wires are hooked
up
backwards. However,
the unit
will not
work until the
wiring
is connected
properly.
INSTALLATION
-
ELC-1 Loran-C MODULE
When
choosing
a
mounting
location,
remember
to install the ELC-1
where it's clear of other
antennas,
wires, masts,
or other obstructions.
A
high
location is
preferred,
however
for
lightning protection,
the an-
tenna
shouldn't be the
highest part
of
the boat. The antenna should be
mounted
vertically.
Make certain it is as
far
away
as
possible
from VHF
radio antennas.
Improper performance
can also occur if the antenna
is mounted too
close to
metal
objects
such as tuna towers.
Again,
a location that
places
the
Loran
assembly
in the clear is
preferable
to one that is
high
and obstructed.
You
must
purchase
an
eight
foot stainless steel or
fiberglass whip
antenna. The threads are standard
3/8"-24 for the
whip.
A ratchet
mount
base is most
commonly
used to mount
the Loran to the boat.
The base
mounting
threads are
conventional 1"-14 machine thread
(NOT pipe thread).
This allows the
use of standard antenna
mounting
hardware.
Tighten
all hardware
securely.
The
cable
supplied
with the ELC-1 is
thirty
feet
long.
Do not cut the
cable
if it's too
long.
Instead,
coil and store
it out of the
way.
An
extension cable is available
if
the
cable is too short. Ask
your
dealer
or
call
your
local service center
or the
Eagle Factory
Customer Service
department
for more information.
The ELC-1 can be
attached to a swivel bracket or
hollow extension
mast,
if desired.
4
LORAN-C
NORTH
PACIFIC CHAIN
GRI 9990
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