Good, thanks :-)
Yes, Kurt says by case with bad pictures: better a bad picture as no picture.
I has few CRT, (it was donate from a german metrologie for me) and i don't know: Which instrument uses this CRT.
RPR tells me: It is for Tek 454,but not common. Reason: CRT has P11 phosphor. I am jumping into air.
best regards from germany.