No display on LCD when
radio is turned On
Batteries are exhausted
Batteries not installed
properly
Recharge or
replace batteries
Remove batteries and
reinstall according to
polarity markings
NiMH batteries run
down quickly
Batteries are at the
end of their life
Replace with new
batteries
Will transmit at
one (1) watt, but not
at five (5) watts
Batteries are low
Selected channel is imited
to one (1) watt
Recharge or
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 or
squelch level is too deep
Re-adjust volume
and squelch
No response to
button press
Key lock is On
Press Backlight/
Key Lock button
No answer to calls
Out of range of
other station
Signal is blocked
by terrain
Switch to five (5)
watts or move closer
Move until you have a “line-
of-sight” to the other station
Problem
Possible Cause(s)
Solution(s)
45
Nothing
comes close to a Cobra
®
Specifications
44 English
Maintenance And
Troubleshooting
Specifications
•
General
Number of Channels
All U.S., Canadian, and International
10 NOAA Weather Channels
Channel Spacing
25 kHz
Modulation
16 KOF3E
Input Voltage
7.2 VDC
Battery Life:
Alkaline Batteries:
5% TX, 5% RX, 90% Stand-by
8 Hours @ 5 Watts, 10 hours @ 1 Watt
Current Drain:
Stand-by
40 mA
Receive
200 mA
Transmit
1.8 A @ High power 0.7 A @ Low
Temperature Range
-20˚C to 60˚C
Radio Dimensions
5.5" x 2.2" x 1.4"
(14 cm x 5.6 cm x 3.6 cm)
Radio Weight
1.1 lbs (0.5 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
-60 dB
Intermodulation and Rejection
-60 dB
Spurious and Image Rejection
-60 dB
AF Output
250 mW @ 8 Ohms
Transmitter
Frequency Range: TX
156.025 to 157.425 MHz
RF Output Power
1 and 5 Watts
Spurious Emissions
-60 dB High -55 dB Low
Microphone Type
Condenser
Frequency Stability
+/-5 ppm
FM Hum and Noise
-40 dB
Operating Your Radio
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 tray and store them in a separate
package. This is especially so if you are using alkaline batteries.
Troubleshooting
•
