pulling power tubes to lower headroom

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Eagertone, Apr 27, 2005.


  1. Eagertone

    Eagertone Member

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    I've posted this thread in the wrong place twice... hopefully I've got it right now.

    So I just got a TopHat Ambassador 2x12 combo. It runs 4 6V6s for 35 watts. I've heard, but never tried, that you can pull the power tubes in sockets 3 and 4 (the outer 2) to reduce power to 1/2 power. Anybody know if this will work with my amp? I'd like to hear from somebody that knows more than I do before I go blowing her up. She's much to pretty, far too expensive, and simply much too young to die.

    Thanks.
     
  2. Blue Strat

    Blue Strat Member

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    In general, this works with 4 power tube amps but in some 4-6V6 amps one pair is run cathode biased and the other as fixed biased. Best to check with the manufacturer.

    BTW, dropping the power to half will be barely noticeable.
     
  3. tonezoneonline

    tonezoneonline Member

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    When they say the inner two and outer two they are referring to Tube Tube Tube Tube
    inner
    outer outer

    Not 3 and 4.This is important because of the way the 4 tubes are wired.
     
  4. tonezoneonline

    tonezoneonline Member

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    Sorry guys.The text did not show as typed.My point was the inner pair would be the center two tube of the quad and the outer would be the two outside tubes of the quad.Not 3 and 4.
     
  5. Eagertone

    Eagertone Member

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    yes. i mean it in the sense that it's:

    3 1 2 4

    so pulling 3 and 4 would be the outer two.
     

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