No display on LCD when
radio is turned On
Batteries are exhausted
Batteries not installed
properly
Replace batteries
Remove batteries and
reinstall according to
polarity markings
Will transmit at
one-half (
1
⁄
2
) watt,
but not at two (2) watts
Batteries are low
Selected channel is
limited to one (1) watt
Replace batteries
Switch to
another channel
Will not transmit
Selected channel is
limited to receive only
Switch to
another channel
No sound from speaker
Volume level is too low
Re-adjust volume
No response to
button press
Button lock is On
Press and hold Hi-Lo
Power/Lock button
No answer to calls
Out of range of
other station
Signal is blocked
by terrain
Switch to two (2) watts
or move closer
Move until you have
a “line-of-sight” to
the other station
Problem
Possible Cause(s)
Solution(s)
37
Nothing
comes close to a Cobra
®
Specifications
36 English
Maintenance And
Troubleshooting
Specifications
•
General
Frequency Range: TX
156.025 to 157.425 MHz
Frequency Range: RX
156.050 to 163.275 MHz
Number of Channels
All U.S., Canadian, and International
10 NOAA Weather Channels
Channel Spacing
25 kHz
Modulation
16 KOF3E
Input Voltage
6 VDC
Battery Life:
Alkaline Batteries:
5% TX, 5% RX, 90% Stand-by
20 Hours @ 2 Watts, 24 hours @
1
⁄
2
Watt
Current Drain:
Stand-by
10 mA
Receive
35 mA
Transmit
700 mA @ High power 200 mA @ Low
Temperature Range
-20˚C to 60˚C
Radio Dimensions W x D x H
2.13" x 1.2" x 8.77" (including antenna)
(4.1 mm x 0.5 mm x 22.8 mm )
Radio Weight
4 oz. (without batteries)
(0.1 kg)
Receiver
Frequency Range
156.050 to 163.275 MHz
Receiver Type
Double Conversion Super-Heterodyne
Sensitivity:
20 dB Quieting
0.35 uV
12 dB Sinad
0.30 uV
Adjacent Channel Selectivity
-50 dB
Intermodulation and Rejection
-60 dB
Spurious and Image Rejection
-50 dB
AF Output
250 mW @ 8 Ohms
Transmitter
Frequency Range: TX
156.025 to 157.425 MHz
RF Output Power
1
⁄
2
Watt and 2 Watts
Spurious Emissions
-60 dB High -55 dB Low
Microphone Type
Condenser
External Microphone Impedance
1000 Ohms
Frequency Stability
+/-10 ppm
FM Hum and Noise
-45 dB
Intro
Operation
Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution
Warning
Installation
Customer
Assistance
Operating Your Radio
Intro
Operation
Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution
Warning
Installation
Customer
Assistance
Operating Your Radio
Maintenance
•
Very little maintenance is required to keep your CobraMarine
™
VHF radio
in good operating condition.
■
Keep the radio and charger clean by wiping with a soft cloth and
mild detergent. Do not use solvents or harsh or abrasive cleaners,
which could damage the case or scratch the LCD screen.
■
If the radio is exposed to salt water, wipe with a soft, moist cloth at least
once a day to prevent build-up of salt deposits, which could interfere with
button operation.
■
If the radio will be stored for a long period, such as over the winter,
remove the batteries from the battery compartment and store them in a
separate package. This is especially so if you are using alkaline batteries.
Troubleshooting
•
