I've had this thing for ages but have used it only rarely because the
display is so dim.

As I recall, I went through the circuitry a long while ago and found no
abnormal readings; leading me to suspect the CRT was the culprit.

A call to Sencore today lists the price of a new tube (18G28) at $198.
Ouch!
Does anyone have any fixit tips for this problem on an SC61.
Has anyone had success using an CRT rejuvinator on an 18G28?

Other suggestions?

Thank you.