GE A3-5825B Use And Care Manual page 14

NOISE
Some noise is to be expected and is normal. There will be a higher level of background noise
when used as a mobile CB Transceiver and the car is running.
If this noise becomes objectionable (which is caused by the vehicle's alternator, generator, spark
plugs, windshield washer and other electrical systems), a noise suppression kit may need to be
installed.
Noise from the alternator or generator will create a whining high pitched sound and will vary
with engine speed. Spark plugs and ignition noise will show up as a popping sound and can also
vary with engine speed.
To tell the difference between noise created by the ignition system and noise created by the
generator, start the vehicle and race the engine — now, turn the engine off, and if the noise stops
immediately, you have determined the ignition system as at fault.
Noise which stops a few seconds after the ignition is turned off, it caused by the alternator or
generator.
Noise can be caused by electrical interference from spark plugs and ignition cables. Most late
model vehicles have resistance high tension ignition cable and resistive spark plugs supplied as
standard equipment. This eliminates the need for spark plug suppression. If not supplied, kits
are available from automotive supply dealers.
CITIZENS BAND
FREQUENCY CHART
Channel No.
Frequency
1 27.015 MHz
2
27.025 MHz
3 27.035 MHz
4 27.055 MHz
5
27.065 MHz
6 27.085 MHz
7 27.095 MHz
8 27.105 MHz
9
27.115 MHz
10
27.125 MHz
11 27.135 MHz
12
27.155 MHz
13
27.165 MHz
14 27.175 MHz
15 27.185 MHz
16 27.195 MHz
17 27.205 MHz
18 27.225 MHz
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