Anything Special about this early 90's 12ax7?

[Top-L]

I have a pair of these from a Hafler Triple Giant. They still work and are two of my favorite tubes (high gain).

Tube is labled 9130 which may have been 1991, which was when that pre was made.

Anything special about these, or were they just run of the mill 12ax7as stamped by Hafler?

 

[ken361]

Re: Anything Special about this early 90's 12ax7?

No, its a chinese tube!

 

[beaubrummels]

Re: Anything Special about this early 90's 12ax7?

It's a small plate version, so it should be low microphonic.

 

[marvar]

Re: Anything Special about this early 90's 12ax7?

No, its a chinese tube!

it sure is Chinese, what generation, I don't know-