This tube tested 104/105 on a recently calibrated and very accurate B&K 700 Dynamic Mutual Conductance Tube Tester. This tester has a scale of 0 to 120, where 100 is the target value for a new tube.  The minimum value for a good tube is 66, a value between 54 and 66 would be questionable, and a result less than 54 would be a fail.  While I cannot guarantee that some other test or tester would give the exact same result, I will stand behind any tube I represent as good that turns out to be not good.

This listing is for the exact tube that is described and shown in the pics.  No substitutions will be made.

Please feel free to message me with any questions.

I do not accept routine returns, but I do make things right when there is a problem with the item.

 

Purchases will be carefully packaged in, mostly, recycled materials.