Mesa .50 Caliber Plus, vacuum sound?

Discussion in 'Amps and Cabs' started by G22, Jan 30, 2015.

  1. G22

    G22 Member

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    Hi TGP,

    Hi have an old 1984 Mesaboogie .50 Caliber Plus.

    There's a little background noise at 3-4 and it doesn't come from the guitar itself, I've unplugged everything and the noise is still there. I guess this noise is normal as it's an old amp and I can live with it (Tell me if I'm wrong).

    Where it comes to be an issue is when I crank it up. I want to put my amp at 7-8 and lower the volume on my guitar to get that classic tube from the tune. The little overdriven clean. BUT WHEN I CRANK IT UP I hear a vacuum sound from the amp and it sucks. Really it's louder thank you can think.

    Is that normal or is it broken? Because like I said at 3-4 it sounds incredible, this amp delivers an incredible clean tone.

    ???????????? :mob
     
  2. LPMojoGL

    LPMojoGL Music Room Superstar Supporting Member

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    Have you replaced tubes?
    If so, filter caps maybe?
    Shouldn't do that. The .50+ is a good sounding lil amp when it's running the way it should.
     
  3. hogy

    hogy Member

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    Well, they don't call them "vacuum tubes" for nothing.
     
  4. jkg

    jkg Supporting Member

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    Def not normal. I have had a 1x12 combo for 24 years and it is not noisy. It is either a tube or a cap problem. They also have a Random problem with the effects loop which can cause some weird signal drop but your sounds like a power tube issue....

    Great amp overall.
     
  5. G22

    G22 Member

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    Thanks guys, tubes are all new since last year and havn't played that much. It must be a problem inside. I have an amp guy in town and I'll bring it to him!

    Could this be my cabinet?
     
  6. NoBrakes

    NoBrakes Member

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    Do a internet search on 50 caliber + noise. They have some issues. They can be a bit noisy and they are basically OK.
     

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