ICOM IC-M304

ICOM IC-M304
Frequency Range:
Texas: 156.025–157.425 MHz
Receive: 156.050–163.275 MHz
Available Channels: US, Canada, International, WX Channels
Emission Type: 16K0G3E, 16K0G2B
Power supply: 13.8V DC ±15%
Current sink (at 13.8V DC) Transmit. Receive: 5.5A (at 25W output) 1.5A (at max autofocus)
Operating temperature range: –20°C to +60°C; –4°F to +140°F
Antenna impedance: 50Ω (SO-239)
Dimensions (W x H x D, excluding projection): 153 x 67 x 133mm ; 61⁄32 x 2 5⁄8 x 5 1⁄4 in
Weight (approximately): 825 grams; 1.8 pounds
NMEA formats: NMEA version 2.0 or 3.01RMC, GGA, GNS, GLL

transmitter
Output Power: 25W or 1W (at 13.8V DC)
Modulation system: variable reactance frequency modulation
Maximum frequency deviation: ±5 kHz
Frequency error: ±10ppm
Spurious Emissions: Less than –70dBc at 25W
Adjustable channel power: over 70dB
Audio Harmonic Distortion: Less than 10% (at 60% development)
Residual modulation: over 40dB

receiver
IF: 1.21 MHz first, 7 kHz second
Sensitivity: 0.22μV (Typical), 12dB SINAD
Squelch sensitivity: less than 0.22μV
Adjustment chapter selectivity: over 70dB
Spurious Response: Over 70dB
Intermodulation: over 70dB
Hum and noise: over 40 decibels
Audio output power: 4.5W (typical) at 10% distortion into 4Ω load