Nothing Comes Close to a Cobra
®
67
66
Specifications
Specifications
•
General
Number of Channels
All International, U.S.A. and Canadian
Channels
Channel Spacing
25 kHz
Modulation
5 kHz Max.
Input Voltage
13.8 VDC
Current Drain:
Stand-by
20 mA
Receive
200 mA
Transmit
5A @ High power 1A @ Low
Temperature Range
-20˚ C to 55˚ C
Unit Dimensions
6.25” x 3.0” x 6”
(15.9 cm x 5.7 cm x 18 cm)
Unit Weight
2 lbs., 12.0 oz. (1100 g)
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
AF Output
2.5 Watts @ 8 Ohms
Transmitter
Frequency Range: TX
156.025 to 157.425 MHz
RF Output Power
1 and 25 Watts
Spurious Emissions
-60 dB High -55 dB Low
Microphone Type
Electret
Frequency Stability
+/-10 ppm
FM Hum and Noise
40 dB
Operating Your Radio
No display on LCD when
radio is turned
On
Improper power
connection
Insure power connections
are proper and secure
Will transmit at
one (1) watt, but not
at 25 watts
Selected channel is
limited to one (1) watt
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
Readjust volume
and squelch
No answer to calls
Out of range of
other station
Signal is blocked
by terrain
Switch to high power
(25 watts) or move closer
Move until you have
a “line-of-sight” to
the other station
Constant beeping with
“check plotter” message.
External alarm input (blue
wire) may be pinched or
touching another wire.
Make sure external alarm
input wire is isolated from
other wires or metal.
Maintenance And
Troubleshooting
Problem
Possible Cause(s)
Solution(s)
Operating Your Radio
Maintenance
•
Very little maintenance is required to keep your CobraMarine VHF radio in good
operating condition.
n
Keep the radio clean by wiping with a soft cloth and mild detergent.
Rinse with fresh water. Do not use solvents or harsh or abrasive cleaners,
which could damage the case or scratch the LCD screen.
n
If the radio is frequently exposed to salt water, rinse it in fresh water at least
once a day to prevent build-up of salt deposits, which could interfere with
button operation.
Troubleshooting
•
NOTE
The typical usage for this marine radio is 10% transmitting, 10%
receiving incoming signals, and 80% in standby mode.
MRF57E_MANL_OPERATION.indd 66-67
12/14/18 2:41 PM
