RigPix logo

Marine transceivers logo


Back to main

Back to Marine transceivers

Next Marine transceiver


Icom logo


Copyright logo


Last modified 2025-01-13

Valid HTML 4.01 Transitional

Icom IC-M421

A picture of Icom IC-M421

SPECIFICATIONS

GENERAL
Type:Marine VHF transceiver
Frequency range: TX: 156.000-161.450 MHz
RX: 156.000-163.425 MHz
Tuning steps:Channelized
Frequency stability:±1.5 KHz @ -20 to +60°C (-4 to +140°F)
Mode:FM
Channels / memory management: 57 international and 59 US channels
1 call
Alpha tags (Ten characters)
Duplex shift / offset:Automatic according to bandplan
Power supply:13.8 VDC (10.8-15.6 VDC)
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):164*78*140 mm (6.46*3.07*5.51")
Weight:1.15 Kg (2.54 lb)
Other features: Channel 16 button. DSC class D. Dual/triwatch. Scanning.
GPS option (NMEA input).




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: ? MHz
2nd IF: ? KHz
Sensitivity:0.8 uV (20 dB SINAD)
Squelch sensitivity:1 uV (Threshold)
Selectivity:70 dB (Adjacent channel)
Image rejection:
AF output power / speaker:2 W at ?% distortion / ? 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:Less than 0.25 uW
Microphone impedance / connector:2 Kohm / ?
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 2004-200x (Discontinued)
Additional info:
Related documents: User manual (1.2 MB)
User manual (3.3 MB, in Swedish)
Modifications and fixes:
Reviews:
Options / Accessories:
MB-69
OPC-891
Flush mount
DC power cable