atmasphere 6as7g output tubes.

I guess Svetlana vs RCA you have to compromise on something, and I also guess your "bias" is tailored to the Russian tube not the RCA

They both bias to the same point.

Got it Ralph, which with the RCA with the same bias they will produce a little more power, run hotter and possibly demand more current for the same voltage bias correct? and also be more prone to failure maybe?

The power output of the tubes has little to do with the bias point. If anything, reducing the bias current will cause the amp to make slightly more power.


The RCAs are properly biased in the amp and will hold up alright if correctly preconditioned (which is about 4 days and nights continuous, whereas the Russian tubes seem to only need 3 days and nights). But this only applies to the 6AS7G and **not** any of the variants (like the GA) which simply won't hold up no matter what you do.