Best Icom 7300 Transmit Bandwidth TBW Settings



I'm an Amateur Radio enthusiast. I love the hobby and experimenting with radios, antennas and software. On my YouTube channel I upload videos on the Icom 7300 and Icom 7610 along with Ham radio software programs. I hope to inspire people to try new things in Amateur Radio.

12 Responses

  1. blank Mark Hindman - KM6PDW says:

    Great video! Thanks!

  2. blank Edmundo CE2EC says:

    Thanks Rick,

    Something new is learned every day, so many things that the 7300 has.


  3. blank Marc says:


    Name is Marc : call sign F6GRH

    Xellent settings and good article : I’ve got a question though ……

    do you know how to reduce the TBW (kind of narrow) in FM mode on the IC 7300 ?

    Thanks for your answer.


    • blank K0PIR says:

      Hi Marc,
      Nice to hear from you and thanks for commenting here.

      No way to do it that I can see. It is not in the menu of the 7610 either.

      Best 73!

  4. blank Chuck, K1DA says:

    A study was done some time ago which indicated rolling off too much low end made for harder copy under bad conditions. There’s enough speech energy in the lower end to help with copy. Too much bass, though, is not well handled by older product detector circuits.

    • blank K0PIR says:

      Hi Chuck,

      Nice to hear from you and thank you for commenting here. Yes, I think my best sounding TBW is 200-2900 and treble +4, bass -2. At least with my new microphone it is.

      Thank you again and good information. Best 73!

  5. blank Stacey says:

    Trying to get N1MM to work with 7300 but the waterfall does nothing. i have rig control but it just want do waterfall. changed the baud rate to 115 but no joy. works with wsjt-x, js8call, sdruno but no N1MM. any ideas?
    just no signals showing up.

    • blank N4OVQ, Stacey says:

      i see no kind of signals anywhere. if i put the baud rate at 115200 then i lose rig control. even on the other digital mods. the waterfall contrast dose nothing. don’t change the color of waterfall at all. its like it don’t scroll down with signals are anything. changed usb cable also like you did one time but no go. its like waterfall is in stop mode.

  6. blank K0PIR says:

    Hi Stacey,

    Nice to hear from you and thank you for commenting here.

    When you say no signals, is the waterfall working? Are you just not seeing spots? You’ll need the cluster working for spots to show.

    Rich, K0PIR

  7. blank K0PIR says:

    OK it needs to be 115200 (don’t use “Auto” anywhere for the baud rate) or it’s not gonna work and if you lose rig control then somethings off. Have a look at the screen captures page and especially the CI-V “Unlink from REMOTE” section.

    In N1MM you’ll have to look at the configuration section for rig control and see that the baud rate is set correct there. Have a look at this page and the video on it.

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