It depends on which tube tester is being used. Eico, Hickock, B&K, SICO all have different values. Also, good testers test for more than just tube strength. It gets quite confusing. That's why I would suggest buying from a reputable dealer if you are have trouble with different readings. Try www.tubesandmore.com, thetubestore.com, or upscaleaudio.com. They usually only sell new tubes and if selling used, will teach you about individual readings.
How to interpret the readings from tube tester?
How to interpret the value of a tube tester?
For example, if a seller says his 6sn7 tube has a reading of
98/99 (minimum 50), on TV-7D tube tester, how good are this tube and how much life it has left (i.e. 90% left relative to a new one or something like that)? I know the higher the value the better, but what is the value that defines this tube as a "new" tube?
any resources on how to interpret this value on particular tube tester? I guess the reading varies from one tester model to another.
ake
For example, if a seller says his 6sn7 tube has a reading of
98/99 (minimum 50), on TV-7D tube tester, how good are this tube and how much life it has left (i.e. 90% left relative to a new one or something like that)? I know the higher the value the better, but what is the value that defines this tube as a "new" tube?
any resources on how to interpret this value on particular tube tester? I guess the reading varies from one tester model to another.
ake
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