M502 VHF DSC Marine radio
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Product: M502 VHF DSC Marine radio

  1. #1
    Join Date
    Dec 2004

    Default M502 VHF DSC Marine radio

    Product Manufacturer: Icom
    ***Discontinued manufacturing of this model in 2007 - M504 is replacement model ****

    The Icom IC-M502 Marine VHF Transceiver provides easy waterproof operation, manually or by remote! The IC-M502, with its standard 4" X 6" front panel, will easily blend into your cabin console or dashboard. The generous front panel provides large function switches and a wide LCD. With full dot matrix characters, information can be easily read under any lighting condition. By adding the new, optional COMMANDMIC (HM-127) all available functions of the IC-M502 (except DSC operation) can be controlled from remote locations, such as from the deck or flybridge. Plus, the COMMANDMIC doubles as an intercom. Click on the small image to get a large picture of the IC-M502.

    2002's Best Fixed Mount VHF Radio award given to the IC-M502 by the National Marine Electronics Association (NMEA).


    CommandMic compact 4x6" flush mount design

    Optional fully integrated COMMANDMIC

    Submersible JIS-7 construction (minus connection cables)

    Three year warranty

    Built-in Digital Selective Calling (DSC)

    All International, USA* and Canadian* channels, plus weather channels* with alert function available. (* USA version only)

    Keypad and display backlighting with 8 adjustable levels

    Supplied Remote Function Mic for clear reception and transmission

    Convenient one-touch "TAG" scanning selection with simple add/delete

    Instant access to Ch 16 and Ch 9 (or Call channel)

    Optional UT-98 or UT-112 voice scramblers for communications privacy

    Up to 22 free channels are available (not available in all areas, ask your dealers for details)

    Available in black or white


    Frequency range:

    Tx: 156.025 - 157.425 MHz

    Rx: 156.050 - 163.275 MHz


    16K0G3E (FM)

    16K0G2B (DSC)

    Usable channels: All international, USA* and Canadian* channels, plus 10 Weather channels.*

    (USA version only)

    Power supply requirement: 13.8 V DC 15%

    Current drain (at 13.8 V DC):

    Transmit: 6 A (at 25 W output)

    Receive: 1.2A (at max. audio)

    Operating temp. range: -20C to +60C; -4F to +140F

    Frequency stability: 10 ppm (-20C to +60C)

    Antenna connector: SO-239 (50 ohm)

    Dimensions (projections not included):

    165(W) x 110(H) x 84.4(D) mm

    6 1/2(W) x 4 11/32(H) x 3 5/32(D) in.

    Weight (approx): 1.13 kg; 2 lb 7.8 oz


    Output power: 25 W or 1 W (at 13.8 V DC)

    Modulation system: Variable reactance freq. modulation

    Max. frequency deviation: 5.0 KHz

    Spurious emissions: -70 dB

    Residual modulation: More than 40 dB

    Adjacent channel power: 70 dB


    Receive system: Double conversion super-heterodyne

    Intermediate frequencies:

    1st 21.7 MHz

    2nd 450 kHz

    Sensitivity: less than 0.25 V (at 12 dB SINAD)

    Squelch sensitivity: Less than 0.3 V

    Adjacent channel selectivity: More than 80 dB

    Spurious response: More than 80 dB

    Intermodulation response ratio: More than 80 dB

    Audio output power: More than 3.5 W (at 10% distortion with a 4 ohm load)

    Supplied Accessories

    Hand microphone

    Spare fuses

    DC power cable

    Mounting bracket kit

    Owner's manual
    Attached Thumbnails Attached Thumbnails Click image for larger version.

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  3. #2
    Join Date
    Dec 2004


    Price Paid: 199
    Recommended: yes
    Cons: Cannot remove microphone cable from unit in case of bad cable
    Pros: waterproof, easy to read screen, stay on back lighting (adjustable), speaker microphone
    No complaints using this unit on my open center console boat. Lot's of options and can configure the unit as a head unit, yet can use the command mic remote for interior cabin areas or forward locations on the boat.

    Very versitle and reliable. Anyone with a open cockpit, this is a radio to consider. Big buttons and dials to be able to use with gloves on during cold weather months

    Easy to use, easy to program, and the DSC functions as advertised and it too is simple to operate. Installation is a snap, either flush mount or bracket mount. Simple pos/neg for the power, antenna connection and easy two wire NMMA wire connection for the unit to send/receive NMMA information to other units such as sonar and GPS.

    I highly recommend this unit.

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