uniden—
MC 615 (AUS) AUSTRALIAN EDITION
MARINE RADIOTELEPHONE
OWNER'S MANUAL
UNIDEN MC615
The UNIDENMC 615VHF marine radio transceiver has been designed togiveyou a
rugged reliable instrument that will provide you with years of trouble-free service.
You are encouraged to thoroughly read this manual to acquaint yourself with the
characteristics and operation of your transceiver so that you can contribute to the longevity
of your investment.
With proper care and maintenance, your UNIDEN MC 615 will outlast your present vessel
and serve you well on board several more. The full features and flexibility designed into this
quality transceiver will prevent it from becoming obsolete regardless of changes in craft
or geographic locations. The unit may be mounted in any number of convenient locations
by utilizing the universal mounting bracket.
The UNIDEN MC 615 is of ail solid state design with conservatively rated rugged compo
nents and materials compatible with the marine environment. The transceiver utilizes a
number of gaskets, sealing rings, waterproof membranes, and other sealants to effect
a splashproot housing for protection of the electronics.
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INSTALLATION
CAUTION: The MC 615 will operate only with nominal 12 volt negative ground
battery systems.
It is important to carefully determine the most suitable iocation for your MC 615 on your
vessel. Electrical, mechanical, and environmental considerations must all be taken into
account. You must select the optimum relationship among these considerations.
Keep in mind the flexibility designed into the MC 615 so that you can most conveniently
use your radio. Features which should be considered are:
1. Universalmountingbracket may be installed on eithertop or bottom of shelf, bulkhead,
or overhead mounting.
2. The microphone connector faces forward allowing convenient in-dash or "built-in"
instailations.
3. The front panel can be fully reversed to provide for optimum viewing and operating for
any mounting position.
4. The REMOTE speaker jack may be used with an auxiliary speaker.
AH' connections are "plug-in" type for easy removal of the radio.
ENGINE NOISE SUPPRESSION
Interference from the impulse noise generated by the electrical systems of engines is
sometimes a problem with radios. The MC 615 has been designed to be essentially
impervious to ignition impulse noise and alternator noise. However, in some installations
it may be necessary to take measures to further reduce the effect of noise interference.
All DC battery wires, antenna lead, and accessory cables should be routed away from the
engine and engine compartment and from power cabling carrying particularly high
currents.
In severe cases of impulse noise interference, it may be necessary to install a noise
suppression kit that is available from your Marine Dealer.
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ANTENNA CONSIDERATIONS
A variety of antennas is available from a number of quality suppiiers. It is recommended
you draw upon the advice of your Marine Dealer in determining a suitable antenna for your
vessel and range requirements.
The general rules for antennas are: The more gain the greaterthe range and, the higher
above the water line the greater the range. Antennas should be located so as not to be
in proximity to metal objects. Antennas should not have excessively long coaxial feed
cables.
CHOOSING A LOCATION
Some of the more important external factors to consider in selecting the location of
your MC 615 are:
1. Select a location that is free from spray and splash.
2. Keep the battery leads as short as possible. Connection directly to the battery is most
desirable, tf direct connection cannot be made with the supplied power lead, any
extension should be made with #10 AWG wire. Long extensions should use larger
wire.
3. Keepthe antenna lead as short as possible. Long antenna leads can cause substantial
loss of performance for both receiving and transmitting.
4. Locate your antenna as high as possible and clear from metal objects. The reliable
range of coverage is a direct function of antenna height.
5. Select a location that does not allow the radio to be subjected to direct sunlight
(including that coming through windows).
6. Select a location that allows free airflow aroundthe heat sink on the rear of the radio.
7. Select a location well away from the ship's compass. Auxiliary speakers also should
be located away from the compass.
After you have carefully considered the various factors affecting your choice of location,
position the radio (with the bracket, microphone, power plug, antenna plug and any
auxiliary plugs installed) into the selected location to assure, there is no interference with
surrounding items. Make the location of the mounting bracket.
Remove the bracket from the radio and use it as a template to mark the holes to be drilled
for the mounting hardware. Drill the holes and mount the bracket with hardware
compatible with the material of the mounting surface. Install the power cable (red is +,
black is '), antenna and all other auxiliary cables and accessories.
Install the radio into the mounting bracket and connect all cables and accessories to the
appropriate jacks and connectors.
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