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DB750 repair

Discussion in 'Amps and Cabs [BG]' started by renejaime, Jan 18, 2009.

  1. Jan 18, 2009 #1
    renejaime

    renejaime

    May 25, 2005
    Austin
    I was playing through my amp and I found that when I dig in it would start to crackle note to note so I figure I would replace my preamp tube for the input gain section (v1) plugged my amp back in and sound wise I dug it but really digging in the amp started to crackle again from note to note would this be another tube to change (maybe v4?) or a sign of something else may be an issue this "crackle only happens when I really dig in.

    here is the set up

    aguilar db750 settings

    gain
    12:00
    eq - high, mid, low set flat to test
    master
    12:00

    for a sec I thought maybe the cab (HT322) was farting out... nope when borrowing a SVT CL driving the amp pretty hard the cab held up like a champ so it's not the cab.

    no effects being used in all this just active basses straight into the db750 (stingray and nordy vj4)

    any ideas or just own up I have no clue and take in for repair?
     
  2. Jan 18, 2009 #2
    TrooperFarva

    TrooperFarva Guest

    Nov 25, 2004
    New City, NY
    Have you tried a different instrument cable?
     
  3. Jan 18, 2009 #3
    David Jayne

    David Jayne

    Jan 16, 2006
    Brookfield, CT
    Instrument batteries OK? Then try this: playing at a moderate volume, pick a corner of the amp up a little, like a half-inch, and drop it. Just do it. Crackle? Yes? Probably a bad solder joint somewhere inside. Usually tough to find unfortunately.
     
  4. Jan 18, 2009 #4
    renejaime

    renejaime

    May 25, 2005
    Austin
    batteries are new on both basses, I'll try the amp goggle tomorrow. When testing the amp after the tube swap of v1 I noticed it mainly happened when digging in on a low A... I figured/hoped it just needs new tubes I've had this amp for 3+ years and this is the first sign of any issue