Looks good, Mike. How are you liking the 2073 replacement? I am thinking of putting a regulator in for the TDA, but it would be easier to just replace the IC if the 2073 works OK.
I too have a SCAF in the audio line and it makes a huge difference on CW (I'm using the Hi-Per-Mite).
As you may note from my earlier message, I implemented an audio pop fix today that works but eliminates the sidetone. I want my sidetone back!