Cobra Electronics 29 NW Antennas Ignition Noise Interference, CB Antenna, Marine Installation

Antennas Ignition Noise Interference

CB Antenna

Note

For optimum performance n passenger cars the ideal antenna location is on the center of the roof. Second choice is on the

center of the trunk.

Note

Because many newer trucks feature fiberglass door skins, the outside mirror must be grounded to the chassis via ground strap, if the antenna is mounted on the mirror bracket.

Note

3-way Combination Antennas are also available which allow operation of all three bands (AM-FM & CB), using a single antenna. However, this type of antenna usually results in less than normal transmit and receive range when compared to a standard-type “Single Band” CB antenna.

Call 773-889-3087 for further information.

CB Antenna

Since the maximum allowable power output of the transmitter is limited by the FCC, the antenna is critical in affecting transmission distance. Only a properly matched antenna system will allow maximum power output. Cobra® loaded type antenna models are highly recommended for most installations. Consult your Cobra® dealer for further details, or call 773.889.3087 and speak to a Cobra® representative.

DATE OF	FCC ID:BBO3K229LTD	ANT
MFG :JUNE 98
	COBRA	PA.SP. EXT.SP.
	MADE IN CHINA	+ POWER–
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707

1A standard antenna connector is provided on the transceiver for easy connection.

Marine Installation

The transceiver will not operate at maximum efficiency in a boat without a ground plate, (unless it has a steel hull). Before attempting installation , consult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water.

Use of a mobile receiver at low signal levels is normally limited by the presence of electrical noise. The primary source of noise in automobiles is from the alternator and ignition system. Typically, when signal level is adequate, the background noise does not present a serious problem. Also, when extremely low level signals are being received, the transceiver may be operated with the vehicle’s engine turned off. The unit requires very little current and therefore will not significantly discharge the vehicle’s battery.

Even though the Cobra® 29 NW has an automatic noise limiter, in some installations ignition interference may be high enough to make good communications impossible. Many possibilities exist and variations between vehicles require different solutions. Consult your COBRA® dealer or a 2-way radio technician for help in locating the source of a severe noise.

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