White noise

Discussion in 'The Workbench' started by BluesRocker, Dec 13, 2009.

  1. BluesRocker

    BluesRocker Well-Known Member

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    I have some white noise in my 2266 that i cant seem to tame without turning all the knobs to 0. the knobs that effect it the most are the 2 gain controls, presence, treble and middle. I have also switched out tubes with 3 different sets and mixed each set every way possible in the event that maybe each of the 3 sets had a dud. The noise gate does nothing for this noise by the way. Any takers?
     
  2. jcmjmp

    jcmjmp Well-Known Member

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    Some white noise is normal with tube amps.

    With regards to the noise gate, its probably not cutting it out because the master volume on those amps is after the Phase Inverter. Perhaps, you could select a low noise tube for that slot. I've had been lucky enough to try some old 7025 RCAs . Great tubes. You could also get some nicely selected current production tubes.
     
  3. BluesRocker

    BluesRocker Well-Known Member

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    All of the tubes that I am using I it are low noise
     
  4. Iron Mang

    Iron Mang New Member

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    You have to try to remember that a perfectly running tube amp will have a soft whoosh sound always, like the ocean from a distance. Its just nature of the beast and the higher the gain of the amp the more whoosh you get. and its all normal.
     
  5. Adwex

    Adwex New Member

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    I'm not sure.
    High gain amps usually make some white noise normally. Was the noise always there since you first got the amp?
     
  6. BluesRocker

    BluesRocker Well-Known Member

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    Well I have only had the amp about a week. So yeah it has.
     
  7. Wilder Amplification

    Wilder Amplification New Member

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    As has already been mentioned, some white noise is normal and even more so with high gain amps. It's when you're NOT hearing the white noise when ya know something's wrong. :D
     
  8. BluesRocker

    BluesRocker Well-Known Member

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    So your saying that a tube amp that is perfectly quiet is a bad one?
     
  9. Wilder Amplification

    Wilder Amplification New Member

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    You should hear SOMETHING coming from the speakers when the amp is on ready to play. White noise when the amp is flat out dimed is normal for most amps is what I'm saying.
     
  10. MartyStrat54

    MartyStrat54 Well-Known Member

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    Well I've heard more than one guy describe his amp as "dead quiet." So I guess they have some sort of problem and they don't know it, or they have bad hearing and they can't hear the normal hiss of a tube amp. I have one amp that is quieter than the others, but it's not "dead quiet."
     
  11. rockinr0ll

    rockinr0ll New Member

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    It's normal man, I have done a lot of work trying to find out what the hiss was. Every amp I play has had it.
     
  12. MartyStrat54

    MartyStrat54 Well-Known Member

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    Great. My girlfriend told me that the hiss I was hearing was that snake in my pants!:fingersx::lol::fingersx:
     
  13. Wilder Amplification

    Wilder Amplification New Member

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    Well you do have static DC current running through the primary of the OT when there's no input signal. And while this is DC current and a transformer cannot pass DC, there are slight fluctuations in this current draw (bias current draw is never constant and can vary by an mA) and those fluctuations are what is transferred to the speaker, which we perceive as "white noise".
     
  14. Adwex

    Adwex New Member

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    I'm not sure.
    As you turn the gain down, the noise should go down as well.
     
  15. rockinr0ll

    rockinr0ll New Member

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    +1 still might not be dead quite but almost.
     
  16. Wilder Amplification

    Wilder Amplification New Member

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    Mine has a "rattle" along with it. :D :dude:
     
  17. BluesRocker

    BluesRocker Well-Known Member

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    Mine seems to be allergic to females.. It swells up when around them.. I dont know why.. It really boggles my mind.
     
  18. MartyStrat54

    MartyStrat54 Well-Known Member

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    Well a lot of women like one with some bite to it.
     
  19. rockinr0ll

    rockinr0ll New Member

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