6922 vs. 6DJ8 vs,7308

European 6DJ8 family equvilent 6DJ8-ECC88, 6922-E88CC,
7308-E188CC

If you read the tube manuals, there are differences in specs between the 3 types. Generally, for use in audio circuits, they are pretty interchangable. But not identical.

-Ed

Add this to Clueless' list: http://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html#6DJ8

A circuit that requires a 7308 may not be able to use a 6DJ8. A circuit that can use a 6dj8 can use a 7308. They are electrically different.

I would caution against the over reliance on any "pecking-order" with respect to "good-better-best" with these tubes. Aside from synergy with particular components, there is variability between brands and even between types within brands. For instance, I had a set of military-grade Telefunken 6dj8's that were much sweeter and less microphonic than MANY of the 7308's, 6922's, and Cca's that I also tried. Also, don't let anyone fool you into thinking that all gold-pins are better than all steel pins.