Hey Myles,
I am working on a adding a Tweed channel as explained on page 152-153 of The Tube Amp Book, to a 1981 Deluxe Reverb. I noticed you are the technical cosultant for this book so I hope you can help me.
This era of "Blackface" has the pull boost on the reverb channel. My amp does not have point X in the diagram, the treble capacitor is closer to the tubes instead of the middle of the board. Of course I wanted to add reverb to both channels and it looks like in doing so I need to pull the treble cap back any way, but I have not figured out where to put the wire to get sound from point D on the AB763 Layout, to point Z. Can you explain how to make this all work or where I can find the info, pictures are helpful.
Thanks, Brendan