63 silvertone

[timmy]

all readings do vary, dark screen low hv set 1.64 high hv set 0.93 bright up screen hv low1.16 high hv set 0.20

[DaveWM]

all that seems correct.

and yet the HV varies from 23kv to 19kv based on brightness?

One last test, check the cathode current of the 6JE6 (or is it a 6DQ5) and check the screen and grid voltage of that tube as well. should be about 140v on the screen and -50v on the grid.