I am having an issue… I have a Lightspeed Zulu 2 and when I PTT, I am getting a great deal of feedback. It is noticeable by myself, occupants and whomever is on the receiving end (CTAF, Tower, etc). It only happens when PTT is held.
I have already gone an reduced the mic gain and no improvement. I did a quick search, and it looks like this issue, while not super common, has happened for others, including Lightspeed Zulu users.
The 2007 Cirrus SR22 airplane I fly uses GTN 650/750 navcom setup. We have also confirmed the cabin speak is off.
Any ideas what might be going on? Really frustrated by this.