6DJ8 vs. 6922?

6922 are  a similar tube ,the 6922 are a bit more rugged the classic Amperex especially white label D getters are one ofthe best verywell balanced, Mullards are warmer older Blackburn  type Also D getter , I am not positive on Siemens,  , Telefunkin German made Mazda made-in France ,

6DJ8 can be used in many of these applications and are very good value 

vintage tube services, or Brent Jesse Recording  are pretty popular tubes are getting pricey, 20 years ago 5x+less pricey.

@bdp24 Yes, they are equivalent can be substituted. If possible, try finding 7308 which is even better depending on sound quality your after. Some of the best NOS tubes include Amperex and Siemens brands. You can find a detail analysis about types of tubes and sound quality here:

https://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html

Look for 7dj8's as well.  Should be interchangable in almost all cases.  Much cheaper and sound just as good.  I ran 7dj8 Telefunkens in my preamps for years.  Just wonderful.

@bdp24 -

       Lots of info/opinions/links, in this old thread:

https://forum.audiogon.com/discussions/1975-new-reflektor-6n23p-swgp-or-siemens-amperex-telefunken-cca?highlight=CCa

                             Happy Listening!

They are similar, but not the same.

Lot's of misinformation on the WWW about ECC88/E88CC/E188CC (including this thread).

DeKay