Uniden MC-4700 - Manual (Page 7)

NOTE; See ground connection under GENERAL INFORMATION for more de­
tail.
4. Connect the black wire to ground. Consult a marine electrician If in doubt. Any
convenient location with good electrical contact may be used, {remove paint).
5. Mount the microphone hanger on the side of the unit or near the unit, using two
screws supplied. When mounting in a boat, place the hanger on the dash so the
microphone is easily accessible.
GENERAL INFORMATtON
GROUND CONNECTION
This radio may be installed and used in any 12V DC negative or positive ground
system.
1. Negative ground system: Connect the Red power lead from the radio to the
positive or (-r) battery terminal or other convenient point, and connect the Black
power lead to the chassis or vehicle frame or H battery terminal,
2. Positive ground system: In the case of positive ground system, connect the Black
power lead from the radio to the negative or (-) battery terminal or other con­
venient point, and connect the Red power lead to the chassis or vehicle frame or
(■!■} battery terminal.
ANTENNA
This radio is designed to operate into a 52 ohm RADIO antenna. Best results will be
obtained from your transceiver if you use a good antenna, properly installed.
A vertically polarized quarter-wavelength whip antenna provides the most reliable
operation and greater range. The shorter loaded-type whip antennas are more at­
tractive, compact and adequate for applications where the maximum possible dis­
tance is not required. Also, the loaded whip antennas do not present the problems of
height imposed by the full quarter-wavelength whip.
Whip antennas utilize the metal body of the vehicle as a ground plane. When
mounted on a corner of the vehicle, they are slightly directional, in the direction of
the body of the vehicle. For all practical purposes, however, the radiation pattern is
non-directional. A slight directional characteristic will be observed only at extreme
distances. A standard antenna connector (Type SO-239) is provided on the trans­
ceiver for easy connection to a standard PL-259 cable termination.
When installed in a boat, the transceiver will perform most efficiently when antenna
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