IC-M127 Specifications
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H.M.S. Communications, Inc.M-127




  • Frequency Range: Transmit: 156.025 -157.425 MHz; Receive: 156.025 - 163.275 MHz
  • Usable Channels: All U.S.A., International and Cnandian channels; plus 10 weather channels
  • Mode: FM(16K0G3E); DSC (16K0G2B; with optional UX-130)
  • Power Supply Requirement: 13.8 V DC +/-15% (negative ground)
  • Current Drain (at 13.8 V DC):
    Transmit: 6.3 (high); 2.0 A (low)
    Receive: 1.5 A (max. audio); 0.5 A (standby)
  • Usable Temperature Range: -20C~ to +60C (-4F to +140F)
  • Frequency Stability: +/-5 ppm
  • Antenna Connector: 50 ohms (SO-239)
  • Dimensions: 229(W) x 78(H) x 220(D) mm; 9(W) x 3.1(H) x 8.7(D) in (projections not included)
  • Weight: 2.5 kg; 5.5 lb


  • Output Power (at 13.8 V): 25 W (high); 1 W (low)
  • Modulation System: Variable reactance phase modulation
  • Spurious Emissions: Less than -70 dB
  • Max. Freq. Deviation: +/-5 kHz
  • Microphone Impedance: 600 ohms


  • Receive System: Double conversion superheterodyne
  • Intermediate Frequencies: 1st: 21.8 MHz; 2nd: 455 kHz
  • Sensitivity: 0.25V for 12 dB SINAD (typical)
  • Squelch Sensitivity: 0.32 V (threshold), 1.0 V (tight)
  • Adjacent Channel Selectivity: 750 dB
  • Spurious Response Rejection Ratio: 75 dB
  • Intermodulation Rejection Ratio: 75 dB
  • Audio Output Power: More than 5 W at 10% distortion with a 4 ohms load (10 W for the hailer function)
  • Audio Output Impedance: 4 ohms


  • MB-66 FLUSH MOUNT: For mounting the IC-M127 to a panel. Available in white or black.
  • OPC-457 NMEA CABLE: Allows you to connect NMEA equipment such as a GPS receiver.
  • PS-60 DC POWER SUPPLY: For coastal station operation.
    • Output Voltage:13.6 V DC
    • Max. Current Drain: 30A
  • PS-66 DC-DC CONVERTER: Enables use of a 24 V boat battery.
    • Input voltage: 19 to 32 V DC
    • Output voltage: 13.6 V DC
  • UA-4 AUDIO AMPLIFIER: Boosts hailer output to a max. of 30 W. Power is controlled via the IC-M127.
  • UT-98 VOICE SCRAMBLER UNIT: Provides 128 analog voice scramble codes for communications privacy.
  • UX-130 DSC UNIT: Provides DSC capabilities.

The ICOM logo is a registered trademark of ICOM, Inc. All ICOM radios significantly exceed FCC regulations limiting spurious emissions. All stated specifications are subject to change without notice or obligation.

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Copyright 1999 Donegal Holdings Ltd., Inc.
Last modified: May 15, 2006