I have the radio playing now. She can really belt out the tunes with three audio stages.
The problem was the dog’s breakfast of bus wires that had come loose going to the three jacks on the chassis and the jack on the panel. The chassis jacks use the bullet shaped plug shown on the far right to switch the grid and plate circuits to select one, two or three audio stages. Oddly enough they do not switch the filament power leaving the unused tubes burning battery power.
A schematic, if available, would still be appreciated.
Ed.