Does your electrostatic do this cool thing?

[old_tv_nut]

Another thing on those flashes - I vaguely recall seeing something similar around the edges of magnetically deflected tubes, maybe on turn on when the HV comes up before the filaments??? I wonder if there is any static buildup on the bezel - I'd be tempted to try running my hands around the face after turning it off to see if I could cause the flashing.

[rcaman]

here is what rca says. afterglow is a condition where some portion of the screen remains lit for a period of time after the set has been turned off. the duration of afterglow dedends on on the high voltage bleed off rate at the second anode of the picture tube. the bleedoff rate tends to be slower in a low leakage tube. hence a better than normal tube may exhibit more longer afterglow. the brightness and contrast setting at turn off the bleedoff rate will be faster.

this condition is quite normal and picture tubes exhibiting this condition are not eligible for warranty concerderation.