WSPR using WSJT-X and ICOM 7300 on MacOS

Discussion in 'Mac Ham Radio on macOS & iOS' started by G5JIM, Mar 30, 2020.

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  1. G5JIM

    G5JIM Ham Member QRZ Page


    I’m wanting to use WSPR to get an idea of my antennas effectiveness, I plan to use band hopping between 20m and 40m and would like to set it up to run for a day or two so I can get a decently rounded idea of how it is working.

    An issue I’m having at the moment is that when I leave it running it seems to stop transmitting (or receiving) after a little while. For the purposes of this I am interfacing directly with the 7300 rather than via RUMLogNG to simplify things.

    My Mac is set to not go to sleep, although I put the screen to sleep sometimes.

    Any help would be appreciated!
  2. K3DCW

    K3DCW QRZ Lifetime Member #212 Volunteer Moderator Platinum Subscriber Life Member QRZ Page

    Sounds like App Nap is kicking in. You can watch this on the Activity Monitor's energy tab. It may be worthwhile to leave WSJT-X running alongside Activity Monitor to see if it gets affected.

    App Nap can be turned off. A Google search will reveal how.
  3. WV8A

    WV8A Ham Member QRZ Page

    The "Get Info" pane (CMD-I) for an individual program will show a "Prevent App Nap" checkbox if it's an option.
    I'm only seeing this shown in Get Info for older, 32-bit apps.

    As Dave mentioned, there are command-line (Terminal) solutions to disable App Nap system-wide.

    I've also heard of, but not experienced, some USB hubs "sleeping" after a period of inactivity, to save power.

  4. G5JIM

    G5JIM Ham Member QRZ Page

    Thanks for the suggestions!

    So I disabled App Nap completely and Gad it run successfully for a few hours, but then at about 01:30 UTC it just stopped running. When I checked it this morning the waterfall view had just stopped.

    Even after restarting WSJT-X it didn’t seem to be receiving audio and when I hit tune the radio transmitted but there was no tone. I also tried switching radio on and off to no avail. I’ll guess I’ll have to restart the machine, but I just can’t see why this is happening. I’m connecting via a cable straight into the back of the machine.

    Attached Files:

  5. W3AJL

    W3AJL Ham Member QRZ Page

    Hello Jim, I believe I'm about to get ready to setup an Icom IC-7300 on a Macbook Pro. To become familiar with the software I've been using WSJT-X with an SDR and a Wellbrook loop, decodes are good. This will be my first rig in a very long time. Were you able to figure what was happening here? Do you have any other suggestions in setting up an Icom 7300 and a Mac? Any suggestions appreciated. Cheers!
  6. G5JIM

    G5JIM Ham Member QRZ Page

    Unfortunately I'm still having issues when I run FT8 that it just stops sending, the software "keys up" the radio but the audio doesn't go through, still somewhat of a mystery! I'm guessing maybe some RF in the shack but I am using a dipole with a balun and a filtered USB cable, maybe I need to try some more filtering, I'd also really love to know if anyone else has experienced this?

    Aside from that particular issue I have had many successful QSOs with FT8 so no worries there, I am using WSJT-X and RumLogNG for my logging so feel free to contact me directly with any questions you may have about that, I'll help as much as I can!
  7. W3AJL

    W3AJL Ham Member QRZ Page

    Thank you, I appreciate that. I'll let you know how my setup goes... I haven't got the rig yet, it looks like a possible wait for it once I even order it.

    73, Art
  8. G5JIM

    G5JIM Ham Member QRZ Page

    It's a great rig, well worth it!
    W3AJL likes this.
  9. W3AJL

    W3AJL Ham Member QRZ Page

    May I ask what rig control and drivers you are using and on what macOS? I did note your original post said "interfacing directly". With how I'm decoding now I know that "band hopping" will be extremely useful. I'm seeing so much about CAT control - this is going to get interesting. If I could set it up to work between WSJT-X and CubicSDR on my current configuration I'm sure it would lead to some insight for when I get a rig. Any details from a real world user would be a helpful starting point after I've read around a bit today. Thanks, 73
    Last edited: May 25, 2021
  10. W3AJL

    W3AJL Ham Member QRZ Page

    It's now functioning from software to software on Mac, interesting that it functions as a virtual rig. I've been using virtual audio cables and now Hamlib NET rigctl as the driver which works over localhost IP connection for rig control. 73

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