[NorthCapNerd]

Thank you both. Yes, that is the exact schematic I used. And I left the negative feedback circuit wire in place (which yes, does go to the volume and tone pots), just lifted from any contact with the transformer. So, I will tie that wire to ground (chassis) and see what happens.

Yes, I have latitude to experiment on this speaker, so I'll look for a foam surround and attach my newly made paper cone to it as if I were repairing one of my JBL's.

Very careful on the tubes, got it. Haven't sprayed out the potentiometers yet. Saw the warnings on D5 vs F5. F5 is now on order.

Appreciate all the help. I'll post some photos on the speaker progress as it moves along, and report back on the volume once I tie the feedback to ground. Out of town for the week, so apologies in advance for holding the forum in suspense.