Does anyone have experience with the 8YP4 Test CRT? And may have any idea why it seemed to work so well with my FADA 895 ( rca 630ts clone ) 12LP4 G1 video input, but work poorly with the arvin model 5204cm chassis 21EP4B and now this magnavox one using a 24ahp4 both with cathode video input, are the voltages just too far out of range for the 8YP4 to work well, is a 20+ sized just too much for it? I'm not sure why it is not liking it, it IS hooked up right.
