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Last modified 2025-01-13

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Icom IC-M604

A picture of Icom IC-M604

SPECIFICATIONS

GENERAL
Type:Marine VHF transceiver
Frequency range: TX: 156.025-157.425 MHz
RX: 156.050-163.275 MHz
Tuning steps:Channelized
Frequency stability:±5 ppm @ -20 to +60°C (+4 to +140°F)
Mode:FM
Channels / memory management: 59 US, 63 Canadian and 59 international channels
10 NOAA weather channels
1 call
Duplex shift / offset:Automatic according to bandplan
Power supply:13.8 VDC ±15%
Current drain / power consumption:RX: Max 1.5 A
TX: Max 5.5 A
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):220*110*109 mm (8.66*4.33*4.29")
Weight:1.4 Kg (3.09 lb)
Other features: Channel 16 button. Class D DSC. Dual/triwatch. Scanning.
Weather alert. AquaQuake water draining. Dimmer. Intercom.
Hailer. Foghorn. Voice scrambler option. AIS transponder option.
GPS option (NMEA).




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 30.5 MHz (Com) - 21.7 MHz (AIS channel 70 RX)
2nd IF: 450 KHz
Sensitivity:0.22 uV (12 dB SINAD)
Squelch sensitivity:Less than 0.3 uV (Threshold)
Selectivity:80 dB (Adjacent channel)
Image rejection:
AF output power / speaker:5 W at 10% distortion / 4 ohm
External speaker connector:




TRANSMITTER SECTION
RF output power: High: 25 W
Low: 1 W
Modulation system:Variable reactance frequency modulation
Max FM deviation (Factory set):±5 KHz
Spurious emissions:Better than -70 dBc
Microphone impedance / connector: Front jack
2 Kohm / 8-pin (Standard mike only!)
Rear jacks
2 Kohm / 8-pin (HM-157 or HM-162 only!)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 2006-2010 (Discontinued)
Additional info: FCC ID: AFJIC-M602.
Related documents: User manual (5.4 MB)
Service manual (4.9 MB)
Modifications and fixes:
Reviews:
Options / Accessories:
HM-126RB/RG
HM-157
HM-162
MA-500TR
MB-75
OPC-999
OPC-1000
OPC-1541
UT-112
Speaker-microphone
CommandMic II
CommandMic III
Class B AIS transponder unit
Flush mount kit
Microphone extension cable (For HM-157)
Microphone extension cable (For standard mike)
Microphone extension cable (For HM-162)
Voice scrambler unit