atmasphere 6as7g output tubes.

Old thread but if I may resurrect this.

Conditioning some RCA 6AS7G
1st Ralph (as always) he is right there is a lot of trouble to go with the American power output tubes on his amps, the Russian power tubes just work I have never seen a Svetlana arcing, already seen in the last 2 days 4 rcas arcing.
Can't comment on SQ yet but preliminar testing sounds to my ears in my system very close Russian vs American, kind of a Rocky IV

Currently cooking 28 rcas.

Question

If the tube was arcing with B+, does the conditioning process could remove after 4 days the arcing? Or once the tube arcs will always do? One GE specifically arced heavily to the point it smoked.
After 96 hours on standby do you apply B+ or do you shutdown, apply standby and then b+?

Honestly I just want to finish this batch testing, I am dying to put the Svetlana right in but don't want to let this opportunity pass specially if I have the American power tubes.

Conditioning completed, the tubes which were arcing before still arcs, with the exception of the GE, which is a G not a GA but I don't trust it so I retired it. Listening to it, I can't tell if the RCAs are better,
More powerful yes they are, I can run the middle switch on the MA-1s on the down position and this is with only 12 tubes
More transparent, could be but I can't confirm need to listen more
BUT highs seems to be recessed and veiled a little, less detail which is a big drawback IMO

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

I really don't like to give up on things but in my case since I have high sensitivity impedance speakers it is not worth the trouble going with the RCAs, this is a preliminary conclusion, I do have to test more.

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?