Technically the 6922 is a ruggedized, mil grade designation. Yes they are interchangeable but some 6dj8 won’t hold up in some newer CJ or any Audible Illusions preamps. I had some nice 1964 Mazda 6dj8 that did not last that long in my CJ. 6922 Gold Lion I have yet to have one die . Same goes for a Reflector 6n23eb, last a long time in my experience.
6922 Tube Question
I need to replace a pair of tubes in my VAC Signature. They are 6DJ8 6922's. Though I've had tubed pre-amps for years, this is my first tube replacement. So I have a real newbie question. Are all 6922's interchangeable? Can I use any 6922 or must they be 6DJ8 6922's?
ps - ya, I know, bad time to need tubes given the world situation.