the horizontal output tube is most likely bad / weak, replaced the bad ( scorched ) cathode resistor 100 ohm, tested @ 45, replaced the pair of G2 resistors with a large 10k, All voltages look OK and match what is shown in RCA 630ts service manual, Cant measure plate voltage with it running, but with wire removed, its 318v at the wire.
the waveforms even are pretty much spot on what is shown in the 630ts service manual for the HOT, so all that is left is a bad tube
