Tested on my AT1000, an extremely accurate modern tester w 4 transformers.

This one passed nicely at 81% of new Gm on both plate sets, 81/81, a silver matched tube. 

Usually new tubes test between 88 and 96% Gm on this tight tester.

Emission for this Raytheon is very good at 81/91% of new.

Gm though being the more significant test for multi-element tubes like AX7 and AU7.

Low gas at 0.4 and 0.2 and no noise tested.

Looking for a nice balanced audio quality 12AU7 tube?  This is it.

20% reduced price 5-22-24. 

Shipping USPS ground advantage.