[Username1]

Well thats essentially correct. The rgb bias settings are a low grey starting point, and the drive adjustments are for the greater beam current, or bright white adjustment. The drive adjustments are kinda like a linearity adjustment for the tube/phosphorus combo. as overall brightness is increased. I think starting with 2X beam current on the red gun for white, by adding a resistor in the cathode circuit would actually be a current limiter. So the question is would this be limiting the max current of the gun? Someone would have to measure what is going on at several current levels of each gun while maintaining white screen to see what this resistor is doing. Current limiting on a gun driven at 2X the current of the other guns for white....