replaced tubes now there's a hum...

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by picbiff, Jul 12, 2012.

  1. picbiff

    picbiff Member

    Messages:
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    Joined:
    Dec 21, 2010
    Location:
    DFW, TX
    FYI: first time changing tubes

    I just replaced the tubes in my Vox ac30cc and when I turned it on there was a constant hum in my TB channel but not my normal channel.

    One of the 12AX7 prongs got bent and I straightened them back out. Would that have anything to do with it?

    Need some advice. Thanks
     
  2. Blue Strat

    Blue Strat Member

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    29,994
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    Location:
    Sterling, VA (not far from Washington DC)
    Swap back the original tubes one by one until the hum goes away. When you've located the problem tube pop it in again to double check.
     
  3. picbiff

    picbiff Member

    Messages:
    17
    Joined:
    Dec 21, 2010
    Location:
    DFW, TX
    Okay I'll try that. Thanks
     

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