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Re: MacBook OS and Failure to Transmit

 

I don't have or use a digirig so I apologize if my earlier comments were misleading. My primary use of fldigi and flrig are for HF data modes where the radio is directly exposed to the software in the OS as a sound card and a serial port.

With a VHF/UHF HT and digirig, how is ptt handled?

When I have done VHF packet radio with a Baofeng HT and a Mobilinkd TNC3, the radio has to be put into Vox mode so it goes into transmit when the Mobilinkd device starts outputting audio.

If the digirig somehow does signal PTT directly (not vox) then presumably the digirig also exposes a serial port for PTT/CAT control, but that is an assumption I would need you to confirm.

I may have mentioned previously that sometimes I do observe fldigi indicating Transmit mode and printing output characters even though the radio never went into TX.? I assume this is a breakdown either in the localhost network traffic between fldigi and flrig or a problem with the serial port comms between flrig and the radio.? It isn't a rare occurrence and others have confirmed similar behavior, but it isn't reproducible on demand and I haven't spent any time trying to troubleshoot the issue.? Usually initiating a 2nd TX does put the radio into TX.

So,

1. Please confirm how the digirig handles PTT. Does it expose a serial port for CAT control and PTT?

2. Verify the serial port settings in flrig. The document you shared was for fldigi and flmsg settings, but if you are using flrig then it is flrig that actually keys the PTT.? A screenshot of your flrig transceiver setup might be helpful.

3. With the current OS and config that is not working, does it fail 100% of the time, or can you sometimes get the radio to go into TX? What about if you click the Tune button in fldigi?

I have a MacBook M3 Pro and I have done some transmitting with it, but it isn't my main shack computer and I don't have it up to date. More critically, I don't own a digirig so that's where my ability to troublsehoot is limited.

73,
Daniel (AE4ON)

On Fri, Mar 21, 2025, 2:09?PM Thomas M. Fields WA7CHF via <fieldstom45=[email protected]> wrote:

Hi Daniel,
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Thank You for your response, and I apologize for my delayed response.? As I stated in my first inquiry, I am somewhat of a novice in setting up my MacBook using Fldigi/Flmsg.? When trying to use Fldigi my radio will not transmit.? I included a Word document identifying my Fldigi settings for my Macbook Pro in my initial inquiry.? I will include that again herein.
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With my radio (Kenwood TH-D74) connected to my MacBook and my Digirig, I will try and send a message.? The message is processed within the Fldigi software and appears that it is being transmitted.? However when I observe the radio, it is not transmitting. I basically have the same settings I had for the Sonoma OS, and prior to upgrading to Sequoia OS, the software and radio operation worked perfectly.? Now the radio is not transmitting.? It is important to note that when the radio is transmitting you will see a red line come on indicating the radio is in transmit mode.? That is not happening now.? There is no tones or other audible indicatoin that the radio is actually transmitting.
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I think you may be onto something with PTT settings, but I am not sure where or how to make those setting adjustments.? The radio is simply not transmitting when Fldigi is showing that a message is being sent.? I am not sure what else I can tell you.? You can refer to all my current settings for the radio in the file I have included.
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Thanks for your help.
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Tom
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