Jumps to 2V when squelch is open. Audio max = 4V (with respect to GND)
Ring = ?
internal 10K PU to 3V3, unknown purpose
Short circuited to sleeve when using the SSM-17B Hand speaker Mic. Maybe that’s the reason why Yaesu doesn’t market the SSM-17B as an accessory to the FT-65. The SSM-512B is advised instead.
Sleeve = speaker+ (Vcm = 2.5V)
2.5mm :
Tip = Connect a PTT switch in series with electret-MIC (1K8 or 2K2 internal resistance) connected to GND. Function generator outputs must be AC-coupled to this input, otherwise the PTT functionality no longer works correctly.
Ring = RX/TX line
RX/TX Short circuited to sleeve when using the SSM-17B Hand speaker Mic.
Use open drain TX and connect it to RX.
To interface to a standard UART: connect the anode of a diode to the UART-RX. Connect the cathode of that same diode to the UART-TX.
Sleeve = GND
This confirms that we are absolutely safe using TS (2 pin) connectors on both sides.
Now the issue you are reporting is likely to do with the mechanical fit. I did overlay of parts of the photo you shared and it confirms what you observed: that the tip part is of different length on 2.5mm side between Digirig cable and speaker/mic.
There is a good number of these cables out in the wild, but this is the first time that I remember this issue coming up. I’ll keep it in mind when reordering this model.
Thanks! I appreciate it and I would be happy to test any revised cables.
But as far as the SSM-17B goes, that’s exactly what Yaesu lists on their accessories page for the FT65R:
Hello! I am so happy to have found this thread, I had to make an account to reply right away.
I have the exact same problem with my FT-4X but kept thinking that I was doing something wrong until I was able to build a cable for my AnyTone at-778uv and confirm that it works as expected.
The cable I’m using is the coiled digirig cable that looks exactly like the one smshannon55 posted pictures of. Any chance I can get in on the replacement/testing bandwagon?
I’m sorry for your frustration, but relieved (selfishly) that I’m not the only one to have this issue. I’m not the person who can help, but I wish you well!
