Modifications for the Icom IC-746

Picture(s) of Icom - IC-746

19-07-1998 IC-746 out of range TX/RX (1 Kbytes)
11-12-1999 IC-746 Modification (2 Kbytes)
25-10-2000 Extended RX/TX for IC-746
02-12-2000 Separating the Tx and Rx lines (1 Kbytes)
02-07-2001 Power mod for the IC-746 (0 Kbytes)
20-10-2001 Solutions for chip blowing with mPC (33 Kbytes)
13-01-2002 Monitor Audio Output Too Low (1 Kbytes)
25-01-2002 Schematic for ICOM CI-V Option (16 Kbytes)

Extended RX/TX for IC-746
Author: - trout1000@squonk.net.MODIFICATION.NET


  • 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.