[DaveWM]

IIRC there is a RC network in there that you want to check for drifted resistors, its in the feedback loop, look for where the sync pulse is fed into the vert multivibrator for a drifted resistor. You say vert issue, lack of height? sync? lin? Of course you want to check the can cap on the cathode 1st as its a likely suspect if you are short on scan.

oh the resistor I am remembering that gave me so much trouble was a 39k from the cathode (pin 3)of the 6GF7 to output from the vert integrator network (just before the sync pulse was coupled to the plate of the vert osc thru a cap). that one was pretty critical.