12AX7 Question(Problem?)

Discussion in 'Amps and Cabs [BG]' started by Cantstandsya, Jul 20, 2002.

  1. Cantstandsya


    Jul 27, 2001
    Fontana, CA
    What would happen to your sound if the 12AX7 became loose inside your amp?I've been getting a horrible sound through my amp lately.It's kind of a static or cable shorting out sound that makes my speakers jump so bad I have to turn my amp off.When I bypass the preamp on my head and use my Sansamp BDDI for a preamp there is no problem.I thought the 12AX7 might have cracked or something from cold weather so I opened it up.The tube was fine but I noticed it was sitting very loose in the tube socket.I put it back in right but have not yet had a chance to try out my rig.Anyone have similar problems?
  2. Munjibunga

    Munjibunga Total Hyper-Elite Member Gold Supporting Member

    May 6, 2000
    San Diego (when not at Groom Lake)
    Independent Contractor to Bass San Diego
    If the tube was loose in its socket, it definitely [note correct spelling] could make the kind of sound you describe. Turn it on and check it out. Report back here to us.
  3. The 12AX7 is easily replaced, and does not require a bias adjustment.
  4. sounds fam,...happened to me on a mesa rig that had spring type tube lockdowns which i forgot to repace over the tube