IC-M424G VHF Marine Radio (Original)

General

Frequency Range
  Tx
  Rx

 
156.025–157.425 MHz
156.050–163.275 MHz

Usable channels

INT, USA, CAN, WX channels

Type of emission

16K0G3E (FM)
16KOG2B (DSC)

Power supply requirement

13.8V DC ±15%

Current drain (at 13.8V DC)
  Tx 25W output
  Rx AF max. (RX SP ON)

 
5.5A
5A (External speaker)

Operating temperature range

-20°C to +60°C; -4°F to +140°F

Antenna Impedance

50Ω (SO-239)

Dimensions (W×H×D)
(Projections not included)

180 × 82 × 119.9 mm; 
7.09 × 3.23 × 4.72 in

Weight (approx.)

14kg; 3.09lb

NMEA in/out formats

RMC, GGA, GNS, GLL, DSC, DSE

Transmitter

Output power (at 13.8V DC)

25W, 1W

Max. frequency deviation

± 5 kHz

Frequency stability

±10ppm (-20°C to +60°C)

Spurious emissions

Less than –70dBc

Residual modulation

More than 40dB

Adjacent channel power

More than 70dB

Audio frequency response

+1dB to –3dB of 6dB octave
from 300Hz to 2500Hz

Receiver

Intermediate frequency

1st 21.7MHz, 2nd 450kHz

Sensitivity (at 12dB SINAD)

0.22µV typical

Squelch sensitivity

Less than 0.22µV

Adjacent Channel Selectivity

More than 70dB

Spurious response

More than 70dB

Intermodulation

More than 70dB

Hum and noise ratio

More than 40dB

Audio output power
External speaker

(at 10% distortion, 4 ω load)
10W typical

Applicable IP Rating

Ingress Protection Standard

Water

IPX7 (Waterproof protection)