Re: 454 screen brightness issues?
I saw that once in a 2456B's CRT. An internal weld betweentoggle quoted messageShow quoted text
a strap and an element broke, leaving an open circuit on
the CRT's intensity (control) grid .
The symptom was the intensity started out low, readout seemed
fine, and the beam could be moved with the intensity control,
but the beam kept getting brighter and brighter.
I'mWhile fixing my newest 465 I recall seeing a post where a 465 had a similar problem. The OP found an internally disconnected Grid pin. Here is the post.