|
A blue glow can sometimes be normal, I have observed this sometimes when just testing a CRT on the checker, if the whole neck is glowing blue however that would be a different matter..
You said the tube checks OK for emisson using a CRT tester? If so then it probably should work. Are you certain you have enough high voltage at the second anode connector?
Also make sure the aquadag coating on the tube has a good connection to ground. (this isn't a metal shell tube is it?)
|