Warm sounding 6922 Type Tubes

@wlutke Thanks for the info. 
 

@earthbound I forgot I purchased another Mullard from Brent Jessee in the past. This one clearly shows it as a Mullard ECC88 and the other was hard to read but the box said it was a 6DJ8  manufactured by Mullard for IEC. Even without much break in, the ECC88 is smoother and less bright than the other Mullard. They are both designated as a 1964 production type but they do not sound the same. So now with this other tube I can say I’m happy with the sound. 

I guess I missed it: What's a "CCA"?

@newbee As you recommended, I installed a JJ and it sounds better the Mullards. It removed the piercing extended highs but the overall sound is just as good as the Mullards. It has a nice soundstage and the bass is well defined. Who would have thought a cheap tube would sound this good. Thanks Ron 

What’s a "CCA"?

this is an old stock euro grading of top tier 6dj8/ecc88 type tubes, usually seen in french dutch and german made tubes

these are very rare these days and command very high prices due mostly to their rarity (they sound very nice but not materially better than ’plain jane’ tubes from the period, so long as the latter are well matched and tested)

but if you want a pair of tubes that cost as much as your linestage, then these are the ones to get 🤣

Thanks @jjss49. I assume Telefunken was one company that made them?