Plane is in for annual right now changing #1 cylinder, just ordered a new antenna for com 1. I hope to have this work done by end of December. I will be going through the radio, and hopefully find what is causing my problem.
I am sure the problem is simple but finding it is time consuming, considering it works most of the time.
I may change the intercom as it was installed when I bought the plane almost 20 years ago.
When the problem occurs I am coming into land and I just fly the plane not a lot of time to troubleshoot.
Next time I fly I will contact Juneau radio outside controlled airspace, let the wife fly while I do more troubleshooting. My #2 com works but again its an old king KX170B and I have been told transition has static.