Icom M504 25 Watt VHF Radio by Icom

Icom M504 25 Watt VHF Radio

Features
General

Frequency range

Tx: 156.025 - 157.425MHz

Rx: 156.050 - 163.275MHz

Type of emission

16K0G3E, 16K0G2B

Usable channels

USA, INT, CAN, WX channels

Power supply requirement

13.8V DC ±15%

Current drain (at 13.8V DC)

Transmit: 5.5A (25W output)

Receive: 1.5A (Max. AF)

Operating temperature range

20°C to +60°C;

4°F to +140°F

Antenna impedance

50 (SO-239)

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

165 × 110 × 123.2 mm

61/2×411/32×427/32 in.

Weight (approx.)

1.45kg

3.20 lb

NMEA formats

Input: RMC, CGA, GNS, GLL

Output: DSC, DSE

Transmitter

Output power

25W or 1W (at 13.8V DC)

Modulation system

Variable reactance Max. freq. deviation

± 5.0kHz

Frequency error

± 10.0ppm

Spurious emissions

Less than -70dBc (at 25W)

Residual modulation

More than 40dB

Adjacent channel power

More than 70dB

Receiver

Intermediate freq.

1st: 21.7MHz - 31.05MHz (Ch 70)

2nd: 450KHz

Sensitivity

0.22 typical (at 12db SINAD)

Squelch sensitivity

0.32 typical (threshold)

Adjacent Ch. selectivity

80dB typical (DSC 75dB)

Spurious response

80dB typical (DSC 75dB)

Intermodulation rejection

80dB typical (DSC 75dB)

Hum and noise ratio

More than 40dB

Audio output power

4.5W typ. at 10% distortion with a 4O load

Supplied Acessories

Hand Microphone

DC Power Cable

Spare Fuses

Mounting Bracket

IPX8 Submersible PLUS (1.5m depth for 30 minutes)

The IC-M504 withstands submersion in up to 1.5m depth of water for 30 minutes. It is equivalent to the IPX8 standard. All products are rigorously checked to pass the quality test at the factory.

Large LCD with dot-matrix characters

The IC-M504 has a 168-charactor, full-dot matrix display that allows you to easily view a variety of information, such as GPS data, DSC emergency data, etc. The large buttons and knobs provide user friendly operation.

ITU Class D DSC

The IC-M504 has built-in class D DSC, which enables you to constantly monitor channel 70. This functionality provides users at sea with the peace of mind that they can call for help by pressing the “Distress” button if the need arises.

Position Request and Position Report

Over and above the DSC, your own and other ships’ position data can be exchanged with the position request or position report functions. The received position information can be transferred to external navigation equipment*. In addition, the polling (request/ reply) function checks whether a specific ship is within the communications range.
* External GPS receiver and navigation equipments which accept NMEA 0183 format are required.

Superior receiver performance

The IC-M504 has excellent receive specifications of 80dB (typical) for intermodulation rejection, adjacent channel selectivity, and 0.22µV (typical) high sensitivity. The IC-M504’s superior receiver provides excellent resistance to intermodulation and allows you to catch a weak signal between strong stations.

Excellent audio output power

The extra large speaker is mounted into a well spaced housing, producing greater sound than the specified 4.5W output power. You can get clear and loud reception without requiring repetition of the message, even over the engine or other background noise.

25W hailer/RX speaker and auto foghorn

When connected to a hailer horn or external speaker on the deck or tower, you can make an announcement on-board from the microphone. The RX speaker function, “receiver-repeater”, allows you to monitor the received audio. Four foghorn patterns are also available for the automatic foghorn.

Rear panel microphone version*

With this version, the microphone connector is drawn from the rear panel and a 6.1m (20ft) microphone extension cable is supplied to allow you clean and neat panel installation.

Available from Boatersworld
Price: $299.99
Updated on 5-30-2008.