Cobra Electronics MR HH425LI owner manual Maintenance Troubleshooting, Specifications

Maintenance and

Troubleshooting

Operating Your Radio

Maintenance

•

Very little maintenance is required to keep your CobraMarine VHF/GMRS 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 exposedto saltwater,wipe with a soft, moist clothat leastonce a day to prevent buildup of salt deposits,which could interferewith buttonoperation.

■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 important if you are using alkaline batteries.

Troubleshooting		•
Problem	Possible Cause(s)	Solution(s)
No display on LCD when	Battery pack is exhausted	Recharge or
radio is turned On		replace battery pack
Will transmit at	Battery pack low	Recharge or
1 watt, but not at		replace battery pack
5 watts	Selected channel is imited	Switch to
	to 1 watt	another channel
Will not transmit	Selected channel is	Switch to
	limited to receive only	another channel
No sound from speaker	Volume level is too low or	Re-adjust volume
	squelch level is too deep	and squelch
No response to	Key lock is On	Press Backlight/
button press		Key Lock button
No answer to calls	Out of range of	Switch to 3 or 5 watts or
	other station	move closer
	Signal is blocked	Move until you have a “line-
	by terrain	of-sight” to the other station

Operating Your Radio	Specifications
Specifications	•
General

Number of Channels	All U.S., Canadian, and International
	10 NOAA Weather Channels, 15 GMRS
	Channels
Channel Spacing	VHF - 25 kHz Max., GMRS - 12.5 kHz
Modulation	VHF - 5 kHz Max., GMRS - 2.5 kHz
Input Voltage	7.2 VDC
Battery Life:	Lithium-ion: 14 hrs @ 5 watts,
5% TX, 5% RX, 90% Stand-by	23.5 hrs @ 1 watt;
	Alkaline: 20 hrs @ 5 watts, 35 hrs @ 1 watt
Current Drain:	40 mA
Stand-by
Receive	200 mA
Transmit	1.8 A @ High power 700 mA @ Low Power
Temperature Range	-20˚C to 50˚C
Radio Dimensions	4.8 in. x 2.4 in. x 1.4 in.
	(123 mm x 62 mm x 36 mm) not including
	antenna
Radio Weight	0 lbs 8 oz. (228 g) without batteries
Receiver
Frequency Range	VHF 156.050 to 163.275 MHz
	GMRS 462.5500 to 467.7125 MHz
Receiver Type	Double Conversion Super-Heterodyne
Sensitivity:	0.35 uV
20 dB Quieting
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	VHF 156.025 to 157.425 MHz
	GMRS 462.5500 to 467.7125 MHz
RF Output Power	1, 3 and 5 watts
Spurious Emissions	-60 dB @ High Power, -55 dB @ Low Power
Microphone Type	Condenser
Frequency Stability	+/-10 ppm
FM Hum and Noise	40 dB

72 English Nothing Comes Close to a Cobra® 73