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RE: Funny that you bring that up...

I wasn't going to post on this thread but decided to anyway. The 12AU7
family is the best (IMO) of the big four (6DJ8, 12AT7 and 12AX7). There
are a plethora of good to great tubes in this family. There are so many that this is the family that allows the greatest ability to fine tune the system to your taste. The thing to know though is that the E80cc, a substitute in almost all circuits, is the very best. And the one to get is the Tungsram. The only truly great tube in the 6DJ8 family is the Amperex pinched waist. There are some good 12AX7 but no great ones. They all smear detail to different degrees (an unforgiveable sin). The 12AT7 family is not bad but there are not many options here. The two most highly regarded are the GEC 2900A (triple mica only) and the Valvo blue label pinched waist. If you are interested in what the AA community thinks of the 12AU7 family read some threads here. The poster on this thread that has pronounced it a bad tube family is inexperienced
to put it politely.

Bart


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