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FT8: New JT Mode for fast QSOs

Discussion in 'General Ham Radio Discussion' started by Moleculo, Jul 11, 2017.

  1. fourstringburn

    fourstringburn
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    W9WDX Amateur Radio Club Member K5KNM

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    Here is a link for WSJT which has all the info you should need.



    Basically you need CAT control so the JT65 or other digital modes software will key your radio automatically, then you need audio in and out to a computer soundcard which transmits and receives digital info from your rig.

    You also need to have a time synced software program running on your computer to make sure your computer is running at the precise time. There are links on the WSJT page for free software like Thinkingman which runs automatically in the background. Correct timing is crucial for a lot of digital modes and the internet time isn't absolutely time correct.

    https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

    Most modern rigs have CAT or C-IV control along with audio in/out so the need for external hardware isn't always necessary.

    What radio do you have that you want to use digital modes with?
     
    Tallman likes this.

  2. Tallman

    Tallman
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    W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    My primary radio that I like the most is Icom 746. Others I used frequently, Icom 7100,
    Yaesu FT-857. I noticed on the back side of the 857 there is a small USB port. I have not connected a computer to it and do not know if it works.
     
  3. fourstringburn

    fourstringburn
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    Your 746 will need a CI-V cable for rig control and your audio lines will need to be tapped from the ACC 1 jack. There is a Ebay seller who makes up cables for these exact purposes if you don't want to make your own.


    Your 7100 only needs a USB cable for both audio and rig control. There is a menu setting for USB audio data to be turned on.

    Either radio would work fine.
     
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  4. camaro1

    camaro1
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    yup just make sure to download and install the ICOM usb driver from the icom site.
     
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  5. Tallman

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    The 7100 is it then! I could made some cables very quickly before 1999, now not so much. Thanks for the reply.
     
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  6. Road Squawker

    Road Squawker
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    #21 Road Squawker, Oct 6, 2017
    Last edited: Oct 7, 2017
  7. fourstringburn

    fourstringburn
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    That'll be easiest for you.

    Follow Camaro's advice because your radio may require a USB driver installed on your computer.

    Check Icoms website for some type of USB audio driver downloads for the 7100.
     
  8. Tallman

    Tallman
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    I have to admit defeat. It is rare that I have to quit back off for a while. This radio and computer interface thing has me down and I'm going to tap out for now. The last time I was a WIZARD when it came to computers was back when DOS 5.0 was new.
    I can't figure out how to install the drivers for the radio and I can't even begin to know what revision the firmware I have.
    I have read manuals and webpages till I am cross eyed.
     
    338_MtRushmore likes this.
  9. fourstringburn

    fourstringburn
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    Don't worry about doing a firmware update yet.

    The download you need should be the driver listed as,

    USB Driver(Version 1.20), Driver Utility and manuals for the 7100.

    This should just install automatically as a zip file with no configuration or any other settings by you.

    Plug in the USB cable and check to see if your computer recognizes a new comport by checking the decice manager and clicking the comport icon.

    Once installed, you should be able to install the WSJT software and see and select the new comport in the WSJT settings. There are a few other obvious radio specific settings to look for too.

    Then select USB audio in and out in the audio settings menu tab.

    Go back and to the main settings and look for a PTT button and click on it and if it turns green, you're good to go.

    Good luck.
     
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  10. fourstringburn

    fourstringburn
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    Here is some sreenshots that will show what you need to set.

    The WSJT main settings is in the file tab, then scroll down to configurations, Then you will see the setup box come up. Set the General box 1st with your call,grid etc. Some of the other check boxes maybe default. If not, copy what you see here for now.

    Screenshot (12).png





    Below is the Radio tab in the set up box. Select radio, comport, and baudrate for your radio. Icom is generally set at 19200. Copy the other settings except the Handshake. Your radio probably needs to have "none" selected.

    Screenshot (9).png




    Now select your audio source for audio in and out. This is located in the Audio tab of the setup box. My radio also uses USB for both.


    Screenshot (10).png


    Now go back to the radio tab and click on the "Test CAT" button and it should turn green like in the pic below. Also click the "Test PTT" and your radio should key and this box will turn red. If everything tests correctly, congrats! your done with the initial setup.



    Screenshot (9).png

    I hope that helps a bit more. I would recommend starting off with JT65 first since it is much slower than FT8 mode to get a feel for it. This is easily done on the WSJT main page by clicking the mode tab.
     
  11. fourstringburn

    fourstringburn
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    Very important for digital modes is to have your accurately computer time synced. You need download this free software that runs in the background.
    You can do some basic configuring to be sure it comes on automatically when you boot your computer and that it will auto sync every 30 minutes.


    http://www.thinkman.com/dimension4/download.htm
     
: JT8

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