When you grey scale these one of the bias controls should
be full CCW when done. In other words turn all 3 down
& use 2 of them to balance the grey scale.
The reason for the green tint & it being the control
full CCW is the green gun is the strongest.
Another CRT test you can do is a life test. Sometimes its
built in but if not turn off the filaments & watch how fast
the meters drop. Any that fall fast are not quite up to snuff.
If they all fall slowly & apx the same rate you are good.
73 Zeno
