vintage Gibson BR6- tube problem?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by hw2nw, Jan 15, 2006.


  1. hw2nw

    hw2nw Member

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    Hey guys. I just bought a lovely BR6 from pepperco (great guy to work with btw).

    The amp works fine for about twenty minutes or so, then the volume drops a bit. I'm just trying to diagnose the problem so I can get the correct parts. Part of me has a hunch it could be the tubes, since I wouldn't doubt if these were the original set.

    The tube make-up of this amp is:

    (from L to R in back)
    (1) 6SJ7 preamp
    (1) 6SN7 phase
    (2) 6V6GT power
    (1) 5Y3GT rectifier

    Any suggestions?

    thanks guys!
     
  2. pepperco

    pepperco Member

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    actually,
    Its not so much the volume that drops, (although the volume does
    drop a bit). Its more so that the tweedy old school sweetness seems
    to drift a bit, and the amp gets a little darker sounding.

    Is it a Holiday tomorrow? I think the post office may be closed.
    Darnit, I may have to ship on Tuesday.
     
  3. hw2nw

    hw2nw Member

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    ah, i see. may just be a preamp tube then, but I'm not 100% sure.

    it is a holiday tomorrow...no worries about shipping tuesday :)
     
  4. phoenix

    phoenix Member

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    is it like this '48?
    [​IMG]
     
  5. hw2nw

    hw2nw Member

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    Very close, but I believe it's only 2 input.

    Here is a picture of it.


    [​IMG]
     
  6. hw2nw

    hw2nw Member

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    hm. no diagnosis?

    I'm sure someone will have a hunch. :)
     

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