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Thread: Getter flash spots changing over time

  1. #1
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    Getter flash spots changing over time

    Does it indicate a problem or age, etc. if a tube (6550) starts to get a gray coloring around the side getter flash spots. It was totally silver when I first installed the tubes and now the edges are turning grayish.
    Attached Thumbnails Attached Thumbnails new-tung-sol-getter-flash-changing.jpg  

  2. #2
    Lifetime Member Enzo's Avatar
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    Generally means the vacuum inside the tube is going soft.
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  3. #3
    Supporting Member eschertron's Avatar
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    What's the time frame? Hours, months, decades?
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  4. #4
    Lifetime Member Enzo's Avatar
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    All I can say is this:

    If you see a guy on the street, and his hair is turning gray. It tells you he is aging - whether it happened suddenly or over 20 years is hard to say.

    A white edge to the getter means air, however fast things inside are changing. SLow leak, fast leak, who knows?
    Education is what you're left with after you have forgotten what you have learned.

  5. #5
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    Gas has gotten into the tube SOMEhow. Whether via vacuum leak or released because the tube was overheated, can't tell you. No way to predict life, either. Just keep a casual eye on it, in my opinion.

    Yes - what IS the timeframe?

    Justin
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