Tubes glow blue...

Discussion in 'Amps and Cabs' started by jspartz, Jan 22, 2008.

  1. jspartz

    jspartz Member

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    Hello,

    I have a Sano 2x12 tube amp with 7591 power tubes in it. They have a blue glow to them. Is this a sign of trouble or is it somewhat normal? I do not see that with my other tube amps.

    Jason
     
  2. Sean French

    Sean French Supporting Member

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  3. Blue Strat

    Blue Strat Member

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    What they said. Blue Glow is not an indication of anything bad, but it doesn't guarantee that the tubes are OK either;)
     
  4. jspartz

    jspartz Member

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    Sounds good, Thanks!

    Jason
     
  5. betterdays

    betterdays Member

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  6. Zero Point

    Zero Point Member

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    Blue is actually high quality. It's the gas inside the vacuum. Pretty sweet!

    A 'bad' tube burns orange/reddish to red. :p that's not good.

    -ZP
     
  7. K-Line

    K-Line Gold Supporting Member

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    Brilliant! I love it.
     

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