Einstein 100 Power tube mixing?

[Faldoe]

I just received an Einstein 100 I purchased and it has a mixture of EL34L and 6AC7 tubes in it. I don't want to test it yet as I wanted to confirm if this is ok to run these two types of tubes.

The 6AC7s are the 2nd and 3rd tubes. The EL34L are the 1st and 4th tubes.

 

[MourningEngine]

Yes, it is fine to run a mixture of power tube pairs(!) in the Einstein. The inner and outer tubes work as a pair. In any case bias should be set properly.