Blues Junior III reverb/volume issue

Discussion in 'Amp Tech Center' started by Danny87, Sep 23, 2016.

  1. Danny87

    Danny87 TDPRI Member

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    Hi,

    I'm new here so please excuse me for asking such a noob question :(

    I've just purchased a fender blues junior III which rocks! Been playing through it with my squier classic vibe teles but I've noticed one little thing that is kinda irritating but could also be completely normal (I'm not that experienced when it comes to gear).

    Whenever I have the volume past 7, which is on verge of breakup, if I have the reverb on it produces kind of a distorted/vibration sound within the amp when I play certain notes or bends. I have tightened all screws, changed all the tubes, checked reverb tank but to no avail.

    Is it normal or is there something not quite right?

    Thanks :)
     
  2. elmoscafeo

    elmoscafeo Tele-Afflicted

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    Tightened all the screws?? On the reverb tank?? That'll make it worse. Reverb tanks should be loose and have rubber grommets installed to help isolate them between the reverb chassis and the amp. Sounds like you may have been getting some speaker vibration induced in to the reverb tank, causing the springs to oscillate. Loosen the screws on the reverb tank and try mounting the tank in a reverb tank bag. If you don't have one, try applying some weather stripping under the reverb tank edges to help isolate it from the amp cabinet.
     
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  3. Danny87

    Danny87 TDPRI Member

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    I have tightened all the screws around the cabinet, I have left the reverb tank screws loose. I will get a tank bag and see if that helps. Thanks
     
  4. vegie1

    vegie1 Tele-Meister

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    I had the same issue, I put a sheet of bubble wrap under the tank.
     
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  5. Danny87

    Danny87 TDPRI Member

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    Thanks for the tip dude!
     
  6. Danny87

    Danny87 TDPRI Member

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    For anyone reading this with the same problem. I found out it was indeed the reverb tank springs oscillating. It is a ruby tubes 8EB2C1B tank. I tried the above to no avail so I decided to replace the tank with the MOD 8EB2C1B. I can now drive my amp with reverb without getting any of the noises mentioned and it actually is a much nicer verb. Problem solved!
     
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  7. robrob

    robrob Poster Extraordinaire Ad Free Member

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    Cool, congrats on fixing the reverb problem.
     
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  8. Thin69

    Thin69 Friend of Leo's

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    Great, congrats on getting the amp working properly!
     
    Danny87 likes this.
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