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Icom IC-746
Specifications

Return to 746

Discontinued Amateur HF Transceivers 

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746 Specifications

General
  • Frequency Coverage:
    • Receive: 0.030 - 60.000 MHz, 144-148*1*2
    • Transmit:
    •   1.800 -   1.999 MHz*2
    •   3.500 -   3.999 MHz*2
    •   7.000 -   7.300 MHz*2
    • 10.100 - 10.150 MHz
    • 14.000 - 14.350 MHz
    • 18.068 - 18.168 MHz
    • 21.000 - 21.450 MHz
    • 24.890 - 24.990 MHz
    • 28.000 - 29.700 MHz
    • 50.000 - 54.000 MHz*2
    • 144.000 - 148.000 MHz*2
    • *1 Except for some frequency ranges
    • *2 Depending on version
  • Mode: USB, LSB, CW, RTTY, AM, FM
  • Number of Memory Channels: 102 (99 regular, 2 scan edges and 1 call)
  • Antenna Connector: SO-239x3 [2 for HF + 1 for 144 MHz bands; 50]
  • Usable Temperature Range: -10C to +60C; +14F to +140F
  • Frequency Stability: Less than 7 ppm from 1 min. to 60 min. after power ON. After that, the rate of stability change is less than 1 ppm at +25C; +77F. Temperature fluctuations 0 C to +50C (+32F to + 122F) less than 5 ppm.
  • Power Supply Requirement: 13.8 V DC (15% negative ground)
  • Current Drain (at 13.8 V DC): Transmit max. power: 20A
    • Receive standby: 2.5A
    • max. audio: 2.7A
  • Dimensions (approx): 287(W) x 120(H) x 316.5(D) mm, 11.3(W) x 4.75(H) x 12.5(D) in (projections not included)
  • Weight (approx): 8.9 kg; 19.625 lb.

 

Transmitter
  • Output Power:
    • SSB/CW/RTTY/FM: 5-100 W
    • AM: 2-40 W
  • Modulation System:
    • SSB, AM: Balanced modulation
    • FM: Variable reactance modulation
  • Spurious Emissions: -50 dB (HF), -60 dB(50/144MHz)
  • Carrier Suppression: More than 40 dB
  • Unwanted Sideband Suppression: More than 50 dB
  • Delta TX Variable Range: 9.999 kHz
  • Microphone Connector: 8-pin connector (600 ohms)

 

Receiver
  • Sensitivity:
    • SSB, CW, RTTY (10 dB S/N):
      • 0.16 V (1.8-29.99 MHz)*1
      • 0.13 V (50MHz)*2
      • 0.11 V (144 MHz)*3
    • AM (10 dB SINAD):
      • 13 V (0.5-1.799 MHz)
      • 2.0 V (1.80-29.99 MHz)*1
      • 1.0 V (50/144 MHz)*2,3
    • FM (12 dB SINAD):
      • 0.5 V (28.0-29.99 MHz)
      • 0.25 V (50 MHz)*2
      • 0.18 V (144 MHz)*3
    • *1 Pre-amp 1 ON, *2Pre-amp 2 ON, *3Pre-amp ON
  • Squelch Sensitivity:
    • USB, LSB, CW, RTTY - Less than 5.6 V
    • FM - Less than 1.0 V
  • Selectivity:
    • USB, LSB, CW, RTTY - More than 2.1 kHz/-6 dB ; Less than 4.0 kHz/-60 dB
    • AM, FM-N - More than 9.0 kHz/-6 dB ; Less than 20 kHz/-40 dB
    • FM - More than 12 kHz/-6 dB ; Less than 30 kHz/-50 dB
  • Spurious and Image Rejection Ratio: More than 70 dB (except IF through in 50 MHz band)
  • RIT Variable Range: 9.999 kHz
  • Audio Output Power (at 13.8 V DC): More than 2.0 W at 10% distortion with an 8 ohm load
  • Specifications are subject to change without notice or obligation.

 


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