That don't sound to good , Is that the set that was made in 1950 thay you were working on ?
How many secondary outputs on the power transformer ?
Is it just a 6.3 filiment voltage and a B+ ? or are there other outputs ?
What Im wondering if it could be possible that there is a power resistor that has died , or the ohms reading is to high ?
Sounds like the B+ is OK for the RF IF and sound circuits , but not there for the oscillators or the deflection .
I hope you get it sraightened out