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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