are all mesa pre amp tubes "balanced"?

[diamondschwin]

just wondering, i have five extra mesa preamp tubes 12ax7 in boxes and was just wondering if they were all balanced so if my phase inverter tube in my dual rec and stiletto blow i could replace them with one of these

 

[Boogiebabies]

A definite no. They are tested for microphonics and to see if they work.
Thats all.

 

[Platypus]

Nope.