Thank you for everyone's comments. I was asking what the tube tester needed to test and a recommendation for a tester. My main goal would be if I hear sonic degradation to determine the bad tube or tubes. My components have very low hours at this point in time.
From the comments it looks like there are no reasonably priced testers.
If a vendor needed to do the testing would this eliminate purchasing tubes over the internet ?
From the comments it looks like there are no reasonably priced testers.
If a vendor needed to do the testing would this eliminate purchasing tubes over the internet ?