Icom 7300 RTTY FSK with MMTTY and N1MM Logger


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.

20 Responses

  1. Dave W8EIR says:

    Rich, you’re the man! Thanks for your great post!

    • K0PIR says:

      Thanks Dave. I played with the radio today on 20 meters (SP DX RTTY Contest) using RTTY and it was great. Using CW or RTTY in a contest is a quick way to make new acquaintances and accumulate some DX contacts 🙂

  2. Timothy ORourke says:

    I did not see where you used the CI-V cable ?

  3. Jim says:

    I’ve been watching your channel and your hanging out on your blog a lot lately. I’ve had my 7300 for over a year and was running it with a Tigertronics SignalLink USB. I decided, after chatting with a fellow in my DX club, to use the internal sound card. Well that led me to your page and I’ve been working through the videos. Just got FSK working! Thanks for the great videos. 73 and good DX OM. -jim KE4GVO

    • K0PIR says:

      Hi Jim,

      Thank you! That’s great news and I really like FSK. It is fast and the filter I believe is better. Over the weekend I had fun in the RTTY contest. Thank you again, best 73 and good DX – Rich, K0PIR

  4. Declan Craig says:

    Hi Rich, set up as per your video and blog, works 100% on my PC but on my Laptop a slight issue. When I click a macro the rig TX’s a carrier for approx 5 secs before sending the characters. Wonder if you have come across this ? maybe it’s peculiar to my laptop


    • K0PIR says:

      Hi Declan,
      That’s great and thank you for commenting on this post. Sometimes it’s just a matter of tweaking things a bit. 5 seconds is a long time. It may be the Silicon Labs driver for the USB cable. Did you try restarting windows and moving the USB cable to another USB port on the Laptop? Also, if you are comfortable with it, can you look in Device Manager and go to the Silicon Labs USB to UART Properties and try changing the flow control under Port Settings. Try Hardware for flow control. If that doesn’t work after a few tries, go back to the Port Settings tab and click on Advanced. Try altering the FIFO. Select a lower setting at first and try it a few times. As always, restart Windows occassionally.

      You could also look at the settings in MMTTY. Look at 5:10 in the video and try a different setting there.

      Hopefully, after some changes, it will just start to work. That’s usually how it works for me. LOL

      Thanks again, best 73 and let me know what happens and how it’s working.

      Rich, K0PIR

  5. YD4IRS says:

    How to make it done on IC-7410?

    • K0PIR says:

      Hi Robby,
      Thanks for commenting and thanks for coming by my website. I’m sorry, but I don’t believe it will work on the 74010 like the 7300. I don’t think the 7410 can do FSK like the 7300. You would probably need to use AFSK with the 7410. Have you done that?

      Thank you and best 73 – Rich, K0PIR

  6. Alex says:

    Hi Robby,
    I setup RTTY with Log N1MM and I used one cable USB.

    • K0PIR says:

      Hi Alex,

      Nice to hear from you and that’s awesome. If you are getting FSK I’m guessing you are using VSPE. Can I ask you, did you pay for yours or are you using the free 32 bit version? If not VSPE, what are you using? Thanks for commenting because it helps me and others know what is working for Hams.
      Check out my new video on N1MM and the Spectrum Display.
      Rich, K0PIR

  7. Denny Thompson says:

    Regarding your Topic “MMTTY Icom 7300 RTTY FSK”. Using your link,
    “(UPDATE 7/10/17: The EXTFSK v2.0e looks to be included with MMTTY, so there’s no need for the extra download. ” I went to their site but could not find any link to EXTFSK v2.0e. Can you please direct me to this link?
    Thanks for this and your great videos.
    Denny, KR7SWA

    • K0PIR says:

      Hi Denny,

      Nice to hear from you and thank you for the question and thank you for the comment.

      The last fresh install I did of MMTTY I did not need to download the plugin EXTFSK. It appeared to be included in MMTTY installation.

      Install MMTTY and go to Option>Setup MMTTY>TX tab. In the dropdown scroll to the bottom and find EXTFSK64 (64bit system) to select it.

      In the video: https://youtu.be/ZCkiuzAMuZI?t=4m25s

      Just in case, here’s a link to EXTFSK, both the 2.0d and 2.0e versions are on this page. I am using the 2.0e version at the moment: http://www.qsl.net/ja7ude/extfsk/indexe.html

      Please let me know how it goes.

      Rich, K0PIR

  8. Chris (2E0XRD) says:

    Hi thanks for the great videos I have FSK working but trouble is when i shut the program down and turn my radio back on ,it goes into a transmission loop where i have to turn off the radio with the power button? any ideas I’ve followed everything but this is a real problem ..am i missing something?
    thanks again for all the great videos.

    • K0PIR says:

      Hi Chris,

      Thanks for commenting here and nice to hear from you.

      See if RTS is checked off or activated in N1MM or MMTTY somewhere. That will do it if your radio is setup like mine.

      Otherwise in the radio go to Menu>Set>Connectors>USB SEND KEYING and turn off USB SEND. That may affect something else though.

      See if that will fix it.

      Best 73!

      Rich, K0PIR

      • Chris Darby says:

        Hi Rich tried what you said but i think it was something to do with omni rig from another program.
        One other thing i found was that i was unable to send CW as well, the setting that was the problem was in the radio set section after the cw drop down box i changed the setting to ptt instead of rts always off.
        Now i have a fully working FSK /CW set up on the 7300 with just USB.
        Thanks again for all the time and effort you put into the videos they really do help!
        Chris 2E0XRD

    • Jim W says:

      Excellent article! I can transmit and receive, but it would seem that people have to go looking for me and that I am off freq when transmitting to them.
      Any ideas?
      Thanks – Jim K9IDX

      • K0PIR says:

        Hi Jim,
        Nice to hear from you and thank you for commenting. That’s a great question. I think this is what you are looking. N1MMM Logger+ MMTTY RTTY Support. Section 5.4.

        “5.4. Why to Use “Auto Update TRX Offset w/Mark Freq.” If you are using FSK RTTY, most radios display the actual mark frequency on the tuning dial. A few even do this in AFSK RTTY. If your radio is like this, you don’t need to use this option. The DI window title bar may display an offset frequency (radio dial (+/-) audio), but if this option is turned off the offset frequency will not be logged and you can ignore it.”

        You’ll find that option in N1MM DI-1 RTTY window (the window where RTTY is decoded). Click on “Setup” in the Menu.

        See if that does it for you. Thanks for a great question.

        Best 73,
        Rich, K0PIR

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