Icom IC-746 (IC 746 IC746) transceiver mods reviews software and diagrams
   
 
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04 November 2025, 5:16 UTC 


Transceivers
Motorola

Icom IC-746 (IC 746 IC746)
IC-746
Programming interface schematics for Icom:
Programming software for Icom IC-746 (IC 746 IC746) :
PDF User Manual for Icom IC-746 (IC 746 IC746) :
PDF Adjusments Procedures Manual with schematics for Icom IC-746 (IC 746 IC746) :
Schematics for Icom IC-746 (IC 746 IC746) :

Mods for Icom IC-746 (IC 746 IC746) :
    Icom IC-746 (IC 746 IC746) improved AGC and weak signal volume
    Icom IC-746 (IC 746 IC746) adjustment point
    Icom IC-746 (IC 746 IC746) TX/RX frequency mod IC746 JA ver.
    Icom IC-746 (IC 746 IC746) Electronic Keyer Speed Modification
    Icom IC-746 (IC 746 IC746) Loss of tx power all bands
    Icom IC-746 (IC 746 IC746) Using 500Hz filters on SSB for Dig Modes
    Icom IC-746 (IC 746 IC746) Backlight
    Icom IC-746 (IC 746 IC746) modulation on AM
    Icom IC-746 (IC 746 IC746) (USA models) All Band TX Modification
    Icom IC-746 (IC 746 IC746) Schematic for ICOM CI-V Option
    Icom IC-746 (IC 746 IC746) Monitor Audio Output Too Low
    Icom IC-746 (IC 746 IC746) Solutions for chip blowing with mPC
    Icom IC-746 (IC 746 IC746) Power mod
    Icom IC-746 (IC 746 IC746) Separating the Tx and Rx lines
    Icom IC-746 (IC 746 IC746) Extended RX/TX
    Icom IC-746 (IC 746 IC746) Modification
    Icom IC-746 (IC 746 IC746) out of range TX/RX

Icom IC-746 (IC 746 IC746) technical specifications :  Icom IC-746 (IC 746 IC746) technical specifications



Icom IC-746 (IC 746 IC746) Extended RX/TX

  • Open the bottom cover of the IC-746
  • Place radio on surface upside down with front to your left.

  • Find chip label HD6433042SFB24
  • To the right of this chip (3/4 inch) are two rows of diodes.

  • 14 diodes in the right column and 7 diodes in the left column.

    For Icom 746 Radios with the diodes in the 1, 2, 6, 7, 9, 11 and 14 positions, remove numbers 6 and 7 leaving the other 5 in place.
Mod complete.


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