AudioResearch VTM-200

I have owned a VTM-200 but I have concerns about ampules. I need to know which brand has best harmony with VTM-200.

Thank You
Sorry, what's an "ampules"?

Are you asking what are the best tubes for a VTM-200?
I think you mean tubes. ARC uses the 6550WE's made by Sovtek. The 6N1P are Russian as well. The 6AS7's are Sovtek, but many good American Military versions are also available.
Thank you for your response, I am sorry about my expression.

No worries. I understood you......