sounds very much like my issue, only I have badly distored audio to the transmitter.  mine is in a box ready to be mailed back for eval.

On 8/28/19 10:08 PM, Rob Lapham wrote:

I did use Johns web app and it came up with the same values as the draws manager. I have turned  the gain up all the way and no clean tone.
the radio works fine with my other rp4 and a signal link so I think the radio is ok. also install another cable still no clean audio.
I lost
Rob k6jus