Power Tube Dampeners?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Major9, Jun 10, 2004.


  1. Major9

    Major9 Supporting Member

    Messages:
    62
    Joined:
    Nov 4, 2003
    Location:
    Florida
    I have a combo that develops power tube rattle on the single Power and rectifier tubes (not the preamps). It only happens at a couple frequencies (mostly "E"). I'm sure it's the glass on the tubes as I can stop it by lightly touching the glass with a pencil when it it happening. I can touch either one to stop it...almost like they are talking to each other. Does anyone have a good source for Power tube "dampeners". I don't want a metal shield.....Something that will slip over the tube. I have seen a plastic fishnet stlye on a Mesa Mk4? Any ideas? Thanks in advance.:)
     
  2. Major9

    Major9 Supporting Member

    Messages:
    62
    Joined:
    Nov 4, 2003
    Location:
    Florida
  3. hipfan

    hipfan Member

    Messages:
    2,302
    Joined:
    Nov 15, 2002
    Location:
    Evanston, IL
    Haven't tried those, but they sure look cool! I'm an easy mark for that kind of stuff (from the amount of Auralex stuff in my rehearsal space, I should buy stock in the company), so I'll probably order something from Herbie's. :D
     
  4. muddy

    muddy Member

    Messages:
    5,719
    Joined:
    Jun 3, 2003
    Location:
    nyc
  5. hipfan

    hipfan Member

    Messages:
    2,302
    Joined:
    Nov 15, 2002
    Location:
    Evanston, IL
    Interesting stuff. Thanks for the link, muddy.

    I ordered a couple of Herbie's dampers yesterday for the EL34's in my Demeter. I'll report when they arrive.
     
  6. hipfan

    hipfan Member

    Messages:
    2,302
    Joined:
    Nov 15, 2002
    Location:
    Evanston, IL
    OK, I put the Herbie's dampers on the Siemens EL34's I'm running in the Demeter. It's like a whole new amp!!!



    Just kidding. They're cool little units, and the tubes seem to be running A-OK, with no microphonics or mechanical noise coming through the amp. Of course, there was none before either. If anything, I view these little fellas as kind of preventative maintenance gadgetry. They kind of make me smile when I notice them sitting there on the tubes. That's worth something, isn't it? :)

    I think a long term test is the only way to really figure out if they're worth anything for a guitar amp. I've had bad luck with EL34's going psycho on me in the past with mechanical noise, so hopefully these will help avoid that in the future.
     

Share This Page