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Questions about tubes and gear that glows. FAQ

RE: Tubes tested & burned in

I don't totally agree. It will definitely catch some cases of "infant mortality" that otherwise would occur after the tube was sent to the customer. That is a positive step in improved reliability (and minimizing customer hassle)!

And I will also say that it's not only the number of hours burned in, but the number of thermal cycles the tube experiences. We all know how tubes often fail during the first moments after the tube is turned on. That's why in my process there are multiple on-cool down-off cycles.

So it is a dilemma - you can burn up a significant amount of a tube's life with extensive burn in, yes. But you will also catch some tubes with issues before they are put into someone's gear!

Edits: 02/14/17 02/14/17

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