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Maintenance And
Troubleshooting
Operating Your Radio
Maintenance
Very little maintenance is required to keep your CobraMarine
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
Problem
Possible Cause(s)
No display on LCD
Batteries are exhausted
when radio is turned
Batteries not installed
On
properly
NiCD batteries run
Batteries are at the
down quickly
end of their life
Will transmit at
Batteries are low
one-half (
⁄
) watt,
1
2
Selected channel is
but not at two (2)
limited to one (1) watt
watts
Will not transmit
Selected channel is
limited to receive only
No sound from speaker Volume level is too low
No response to
Button Lock is On
button press
No answer to calls
Out of range of
other station
Signal is blocked
by terrain
36 English
•
™
VHF radio in good
•
Solution(s)
Replace or recharge batteries
Remove batteries and
reinstall according to
polarity markings
Replace with new batteries
Replace or recharge batteries
Switch to
another channel
Switch to
another channel
Re-adjust volume
Press and hold
Hi/Lo Power-Lock button
Switch to two (2) watts
or move closer
Move until you have
a "line-of-sight" to
the other station
Specifications
Operating Your Radio
Specifications
General
Frequency Range: TX
Frequency Range: RX
Number of Channels
Channel Spacing
Modulation
Input Voltage
Battery Life:
5% TX, 5% RX, 90% Stand-by
Current Drain:
Stand-by
Receive
Transmit
Temperature Range
Radio Dimensions W x D x H
Radio Weight
Receiver
Frequency Range
Receiver Type
Sensitivity:
20 dB Quieting
12 dB Sinad
Adjacent Channel Selectivity
Intermodulation and Rejection
Spurious and Image Rejection
AF Output
Transmitter
Frequency Range: TX
RF Output Power
Spurious Emissions
Microphone Type
External Microphone Impedance
Frequency Stability
FM Hum and Noise
•
156.025 to 157.425 MHz
156.050 to 163.275 MHz
All U.S., Canadian, and International
10 NOAA Weather Channels
25 kHz
16 KOF3E
6 VDC
Alkaline Batteries:
20 Hours @ 2 Watts, 24 hours @
1
⁄
Watt
2
10 mA
35 mA
700 mA @ High power 200 mA @ Low
-20˚C to 60˚C
2.13" x 1.2" x 8.77" (including antenna)
(4.1 mm x 0.5 mm x 22.8 mm )
4 oz. (without batteries)
(0.1 kg)
156.050 to 163.275 MHz
Double Conversion Super-Heterodyne
0.35 uV
0.30 uV
-50 dB
-60 dB
-50 dB
250 mW @ 8 Ohms
156.025 to 157.425 MHz
⁄
Watt and 2 Watts
1
2
-60 dB High -55 dB Low
Condenser
1000 Ohms
+/-10 ppm
-45 dB
Nothing comes close to a Cobra
®
37
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