6DJ8 vs. 6922?

@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

Some of my favorite 6dj8 are the early 60s Mazda.   I had a pair of these from Brent Jessee and they sounded incredible.  Unfortunately they had kind of a short life in my CJ preamp.  That thing was hard on tubes.   

I replaced those with some mid 70s Reflektor 6922 .   Another very good sounding tube and RUGGED.   Those gave years of quiet operation whereas lesser  modern tubes would sound good for a few months but get noisy.   Like Audible Illusions the CJ preamps that used a 6922 ate tubes.   The only modern 6922 tube that is consistently good in my experience is the Gold Lion 6922 gold pin , gold grid.   

I like JJ tubes ,but  their 6922 were hit or miss.   When they were quiet they sounded great but in the CJ they weren't in there long before they were noisy

I use the JJ in my Quicksilver's driver tube and they are fine in that position

My Lab 12 DAC 1 Reference uses a pair of EH 6922 and after a year of use they still sound great .   It sounds so good with the stock tubes I am actually afraid to make any changes.   At some point I will replace them , most likely with Gold Lion .

The problem with 6dj8 and 6922 is that the NOS ones are scarce.  I'm talking true NOS, not pulls that look and test new but genuine NOS    

Once I bought a tube tester I quickly found out what tubes were good and what were junk.   I discovered that most of the tubes I bought from trusted sources were as described.  Strong emissions and balanced triode sections.   Matched quads are matched, etc    New production bought in a pinch from a music store  were the worst.   Readings were all over the map for 12ax7 and au7 type.  They must get what everyone else passes on.