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Questions about tubes and gear that glows. FAQ

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RE: Milky white cloudiness behind silver getter flashing = bad tube?

Posted by Jim McShane on August 19, 2024 at 18:38:16:
That is totally normal - it doesn't indicate any sort of vacuum leak.

It sometimes appears in areas where the silver getter flash has been used up, and it also appears on brand new tubes - it happens during the production process.