Icom VHF M 304

Frequency rangeTxRx 156.025– 157.425 MHz156.050– 163.275 MHz Usable channels USA, CAN, INT, WX channels Type of emission 16K0G3E, 16K0G2B Power supply 13.8V DC ± 15% Current drain ( at 13.8V DC) Tx Rx 5.5A ( at 25W output) 1.5A ( at AF max.) 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) 153× 67× 133mm ; 61D32× 25D8× 51D4 in. Weight ( approx.) 825g; 1.8lb 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 Max. freq. deviation ± 5 kHz Frequency error ± 10ppm Spurious emissions Less than – 70dBc ( at 25W) Adj. channel power More than 70dB Audio harmonic distortion Less than 10% ( at 60% dev.) Residual modulation More than 40dB Receiver Intermediate freq. 1st 21.7 MHz, 2nd 450 kHz Sensitivity 0.22¼ V typical at 12dB SINAD Squelch sensitivity Less than 0.22¼ V Adj. Ch. selectivity More than 70dB Spurious response More than 70dB Intermodulation More than 70dB Hum and noise More than 40dB Audio output power 4.5W typical at 10% distortion with a 4© load