6922 Tube Question

@yellowstone Below is the link from Brent Jessee’s audiotubes website - it will give you some insights into the 6922 tube & its equivalents, and sound of brands if you are going NOS. Be worth a quick review(I am not affiliated with BJ , only a customer)

https://www.audiotubes.com/6dj8.htm

Are all 6922’s interchangeable?

yes

same same

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.

6dj8=ecc88=cv5358

6922=e88cc=cv2492=6n23p(Russian)=

6n11(Chinese)=cca=cv2493

7308=e188cc=6n23p-ev=cv4108

All in 6922 & 7308 family are interchangeable and if your circuit permits then and any of the 6dj8 ones.

6np1 (6np1-ev) is a different tube and most likely a modification in circuit is needed.

Ive used JJ and think they sounded good in my gear but it took buying 3 before finding one quiet enough for my preamp.   The other 2 are fine in my amp's driver position.