Thomson TRC 3400 U229-U183 connector / digirig?

Hello everyone,
I have a thomson trc 3400 radio. I want to work in digital modes. The device has a u229/u183 connector.
I am sharing the link to the user manual of the device.

Can I operate Digirig device with this radio? Thank you in advance for your support.
De TA3KAH,73!

I hope someone can help. In my browser, I see an invitation to establish a file sharing account. The file you are sharing is listed as a pdf, but is not available.

73 Constrainted

Uploading: TRC3400 (1).pdf…
Thank you for the information. I am uploading the pdf file here.


TRC3400 (1)_compressed.pdf (850.1 KB)

We’ll need pinouts for these connectors:

As a minimum we need lines for audio in, audio out and PTT.

safety third :slight_smile:

Hmm, looks like these U-connectors are standardized.
Check out this post:

I have looked at this post before. this post made me think u329/u283 connectors would fit. I think it will be valid for 6 pin radios. I did not see any post about the pins of my device. It would be bad to hear that baofeng ht can pair with digirig but green devices cannot.:grin:

Thanks for sharing the info. There is definitely no issue interfacing as long as we connect correct signals:

  • GND (A) → 3.5mm TRRS sleeve (GND)
  • SPK (B) → 3.5mm TRRS tip (RIG_AFOUT)
  • PTT (C) → 3.5mm TRRS ring 2 (RIG_PTT)
  • MIC (D) → 3.5mm TRRS ring 1 (RIG_AFIN)

I placed an order. I will try this​:slightly_smiling_face::pray:

1 Like