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Just taking out a pair of power tubes?? huh?

Discussion in 'Amps and Cabs [BG]' started by albass111, Apr 26, 2006.


  1. albass111

    albass111

    Feb 13, 2006
    Los Angeles, CA
    I was searching the Boogie 400+ and one owner said that it is a reliable amp because in the event that a power tube should fail, all you have to do is remove the pair and it will keep working but with less power.

    This doesn't seem right. Anyone try this?
     
  2. v-12

    v-12

    Mar 3, 2005
    FL Panhandle
    never tried this, but i heard it as well. i thought it had something to do with how the tubes are linked together, but i can't remember where i read it....
     
  3. Plain Old Me

    Plain Old Me

    Dec 14, 2004
    Its correct, but I wouldn't try it unless you are an expert and know which tubes need to be taken out. A better option may be the adjustable power solution, where you can turn pairs on and off. I believe that would probabally remedy any problem you have.
     
  4. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    If a 400+ power tube goes out, you can temporarily remove it, you also need to remove the second tube in its pair.

    The 400+ pairs are: left to right. (looking from the back)
    (Heres how you # your tubes)
    7-8-9-10-11-12
    1-2-3--4--5--6
    If tube # 1 went bad. You would remove #1 and #7 (2-8/3-9/and so on) and keep on playing at 250w. Its not recomended to play your amp this way for ever.

    You might find the (400+ amp-mod), link below a good read.
     

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