2005-01-29

Bo's ICOM IC-746PRO

Brief Summary

• Dimensions: 287(W) x 120(H) x 316.5(D) mm, 9 kg
• HF + 6 m + 2 m
• 100 Watt, all bands
• Incredible Digital features:
  • 32 Bit IF-DSP and 24 Bit AD/DA Converter
  • Digital IF Filter creates 51 types of filter widths and soft and sharp filter shapes
  • All Mode Digital Modulation and Demodulation
  • Built-in RTTY Demodulator and Decoder
  • Digital Twin Pass Band Tuning (PBT)
  • Digital RF Speech Compressor
  • Microphone Equalizer
  • Digital IF filter and manual notch in the AGC loop
  • Phase Shift Network
  • Noise reduction
  • Manual Notch
• 102 Total Memory Channels Independently Selectable Tuning Shapes for CW & SSB
• SSB/CW Synchronous Tuning
• Auto & Manual Notch Filter
• CW Memory Keyer
• VOX
• Auto Antenna Tuner
• SWR plot measurement
• 9,6 kb/s Data Terminal on Rear Panel Band Scope

General

Frequency Coverage

Receive

• 0,030 - 60,000 MHz, 144-148 MHz *1*2

• 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 and 50 MHz bands + 1 for 144 MHz band]

Usable Temperature Range

• -10°C to +60°C

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 +25°C. Temperature fluctuations 0°C to +50°C less than ±5 ppm.

Power Supply Requirement

• 13,8 V DC (±15% negative ground)

Current Drain (at 13,8 V DC)

• Transmit max. power: 20 A
• Receive standby: 2,5 A max. audio: 2,7 A

Dimensions (approx)

• 287(W) x 120(H) x 316.5(D) mm (projections not included)

Weight (approx)

• 9 kg

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 (50/144 MHz)

 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 Ω)

Receiver

Sensitivity

• SSB, CW, RTTY (10 dB S/N):
  • 0,16 µV (1,8-29,99 MHz)*1
  • 0,13 µV (50 MHz)*2
  • 0,11 µV (144 MHz)*3
• AM (10 dB SINAD):
  • 13 µV (0,5-1,799 MHz)
  • 2,0 µV (1,80-29,99 MHz)*1
  • 1.0 µV (50/144 MHz)*2,3
• FM (12 dB SINAD):
  • 0,5 µV (28,0-29,99 MHz)
  • 0,25 µV (50 MHz)*2
  • 0,18 µV (144 MHz)*3

*1 Pre-amp 1 ON

*2 Pre-amp 2 ON

*3 Pre-amp ON

Squelch Sensitivity

• USB, LSB, CW, RTTY - Less than 5,6 µV
• FM - Less than 1,0 µV

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 Ω load

Supplied Accessories

• Hand microphone
• Spare fuses
• Key plug
• DC power cable

Options

Automatic Antenna Tuners, Antenna Element and Antenna Selector

• AH-4 HF + 50 MHz AUTOMATIC ANTENNA TUNER: Covers 3,5 - 54 MHz with a 7 m or longer wire antenna.
• AH-2b ANTENNA ELEMENT: A 2,5 m long antenna for mobile operation with the AH-3. All bands between 7 - 54 MHz can be matched.
• EX-627 AUTOMATIC ANTENNA SELECTOR: For up to 9 separate antenna connections.

Power Supplies

• PS-85 DC POWER SUPPLY: Output: 13,8 V DC (20 A max.)

External Speakers

• SP-21 EXTERNAL SPEAKER:
  • Designed for base station operation.
  • Input impedance: 8 Ω
  • Max input power: 5 W

Microphones

• SM-8 DESKTOP MICROPHONE: Electret condenser-type desktop microphone including two connection cables for simultaneous connection of two transceivers. [Up/Down] switches are included.
• SM-20 DESKTOP MICROPHONE: Unidirectional, electret microphone for base station operation. Includes [Up]/[Down] switches and a low cut function.
• HM-36 HAND MICROPHONE: Same as supplied.

Others

• CT-16 SATELLITE INTERFACE UNIT: Easy tuning when connecting another ICOM VHF transceiver for instant satellite communications.
• CT-17 CI-V LEVEL CONVERTER: For remote transceiver control using a personal computer. Equipped with an RS-232C port. You can change frequencies, operating mode, memory channels, etc.
• UT-102 VOICE SYNTHESIZER UNIT: Announces operating frequency and mode.
• CR-282 HIGH-STABILITY CRYSTAL UNIT: Contains a temperature-compensating oven heater and crystal unit for improved frequency stability. Frequency stability: ± 0,5 ppm.

Brochure in PDF

Bo, OZ2M, www.rudius.net/oz2m