uniden*
10 Channel
MC-2700
OWNER’S MANUAL
Marine CB Transceiver
DESCRIPTION
Your MC2700 represents the rrxrst advanced Mobiie Station type radio ever designed for use
in the Inshore Boating Radiocommunications Service, combined with unique features for use
on a boat, it wlli operate on any of the 10 trequendes designated as citizens band channels
by the Department of Transport artd Communications (DOTAC), Your Model MC2700
features a frequency synthesizing circuit with PHASE LOCK LOOP techniques to assure
uitrapredse frequency control. This radio has been Type Accepted approved by the DOTAC,
WARNING
The Inshore Boating Radio Communications Service is under the jurisdichon of the Depart
ment of Transport and Communications (DOTAC). Any adjustments or alterations which
would aiter the performance of the transceiver's original DOTAC Type Approval or which
would change the frequency determining method are strictly prohibited. Replacement or
substitution of Crystal, Transistors, 1C, Regulator Diodes or any other part of a unique nature,
with parts other than those recommended by us, may cause violation of the technical
regulations of the DOTAC Rules.
INSTALLATION
CAUTION; The UNIDEN MC2700 will operate only with nominal 12 volt negative
ground battery system.
It is important to carefully determine the most suitable location for your UNIDEN
MC2700 on your vessel. Electrical, mechanical, and environmental considerations
must all be taken into account. You must select the optimum relationship among
these considerations.
Some of the more Important external factors to consider in selecting the location of
your UNIDEN MC2700 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. If direct connection cannot be made with the supplied power lead,
any extension should be made with #14 AWG wire. Long extensions should use
larger wire.
3. Keep the antenna lead as short as possible. Long antenna leads can cause sub
stantial 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.
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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 well away from the ship's compass. Auxiliary speakers also
should be located away from the compass.
ANTENNA
Since the maximum allow^le power output of the transmitter is limited by the DOTAC, the
antenna is a very important factor affecting transmission distance, ft isfor this reason that we
strongly recommend that you install only a quality antenna in your new citizens band system.
Only aproperly matched antenna system will allow maximum power transfer from the 50-ohm
transmissbn line to the radiating element. Your UNIDEN dealer is qualified to assist you in
the selecfion of the proper antenna to meet your application requirements.
NOTE: The general rules for antennas are: The more gain the greater the 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.
CONNECTING THE POWER CORDS
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. Mark 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, 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,
OPERATING PROCEDURE TO RECEIVE
1. Be sure that the power source, antenna and microphone are connected to the
proper connectors before going to the next steps.
2. Turn the unit ON by rotating the Volume Control clockwise.
3. Set the Channel Selector Switch to the desired channel.
4. Set the Volume Control to a comfortable listening level,
5. Listen to the background noise from the speaker. Turn the Squelch Control
slowly clockwise until the noise JUST disappears (no signal should be present).
Leave the control at this setting. The SQUELCH is now properly adjusted. The
receiver will remain quiet until a signal is actually received. Do not advance the
control too far, or some of the weaker sigoals will not be heard.
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