EAT value: what are the changing?
 

Hello to everybody, I have a question.
In my E500 SOny Trinitron display there is a varistor (named VR901), that
provide the regulation of EAT.

With another regulation, and so a different EAT voltage (Sony specs 27kV),
what I can note in changing of image?
This is only a "scolastic" question, because I don't know what can change,
in picture, with a different EAT tension.