[ccomer1955]

Lazy measuring on my part, too. I remeasured the two multi-section wire wound resistors (long and short tubular on the schematic) and found a bad section in each one. Weird how measuring from end-to-end gave a different result from measuring each section seperately. Lesson learned there. The two-section wire wound resistor connects directly to the CTs for the filament windings for all of the tubes (transformer terminals 5 & 6, 7 & 8, and 10 & 11). The section on that resistor where the CTs connect was bad (transformer terminals 3 & 4).
Luckily, I have two 77 chassis, so I swapped out the multi-section wire wound resistors. Now I've got the required resistance in each section of both tubular resistors. Do you suppose that might have been the issue?
I'll give it a go tomorrow and see what happens after I inspect for bare-wire shorts in the light of day. Transformer issues make me nervous.