popping sound with new 6922 tube

Misha,
Eweedhome is right. Unless you buy your NOS tubes from a respected seller you are in for trouble, unless you buy a tube tester ( to be found on ebay ) have it checked and calibrated and test every tube you intend to use for rolling. A popping tube belongs out unless you want to risk damage to your gear.

I agree with the above statements, but would add one note: If you do buy a tube tester- get one that checks the tube at full operational voltage. Some anomalies(IE: anode to grid breakdown voltage) won't show themselves at reduced voltage levels and/or if the tube is not at full operational temperature. Some testers also have small speakers that allow you to actually hear any microphonics(noise) that the tube is producing. An important feature if you are screening tubes for use in phono stage or pre-amp operation.

Thanks Rodman!

Thanks a lot, everyone. There are so many things to learn! And fascinating.

I just got a C-J CT 5 preamp which uses that tube. It's my first tubed equipment. I will order from C-J when I need new tubes. Thanks everyone.