And in every post about that 5 volt tube I said it might not last.
I am being the guinea pig here so no one else makes a mistake. I have been using a 12au7 for well over a month now. If you compare the gain, plate resistance, and so on, they are very similar to the 6dj8. The only pin difference is the center tap heater.
I have enough exp with tubes that if I say it will work, it will.
Easy padre, no one is questioning your knowledge and experience. I was erring on the side of caution. Someone misreads and sticks one straight in. Someone gets an adapter and its the wrong kind. Things happen...that don't have to ...but in no way refuting your knowledge, okay ?