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yba-3 keeps blowing fuses HELP

Discussion in 'Amps [BG]' started by hydrohydra, Jan 12, 2013.


  1. For the past couple of weeks I've been playing my yba-3 through my custom made 4x10 1x15, the head has recently been restored with all nre power and pre amp tubes, before I was running my head through a sunn 2x15 and had only burnt a fuse once, over the course of a couple months, now that I've been using my 4x10 1x15 I blew 2 maybe 3, I've also recently added a boss odb-3 pedal to my rigg and my drummer thinks its pushing my head to hard and burning the fuse, I can generally play for a while for example both of the last times it blew I was turning off my OD, I was hoping someone could give me some advice.
     
  2. B-string

    B-string Gold Supporting Member

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  4. Primakurtz

    Primakurtz Registered Nihilist

    Nov 23, 2011
    Denver, Colorado
    What are the ohms rating of these 3 cabinets?
     
  5. The sunn is 8ohm and the 4x10,1x15 is 4ohm
     
  6. Primakurtz

    Primakurtz Registered Nihilist

    Nov 23, 2011
    Denver, Colorado
    That could be the issue - the amp is solid at 8 ohms but not at 4. I have heard of this happening with some old Traynors. They can handle 4 ohms, but not for extended periods.
     
  7. That sucks, I was just considering changing my cabs together too in hopes of extra head room, maybe I should just find a second 8ohm cab
     
  8. Bassmec

    Bassmec

    May 9, 2008
    Ipswich UK
    Disclosures:
    Proprietor Springvale Studios
    I have allways been confused about why Traynor did not provide 4/8/16 ohm transformer taps on this, unlike proper British amplifiers.
    http://www.talkbass.com/forum/f15/traynor-yba-3-impedance-rating-info-posterity-870355/
    Interesting! No fixed variable bias either? + Those colonial chaps also appear to have made the tag strip out of a hardboard material that absorbs moisture and carbon tracks!.
    But then of course my ex misses was Canadian, so I kind of understand.
    :D:bag:
     
  9. Primakurtz

    Primakurtz Registered Nihilist

    Nov 23, 2011
    Denver, Colorado
    According to that thread, the speaker jacks are wired in series. If so, two 8 ohm cabs are showing the amp a 16 ohm load.
     
  10. Edword

    Edword

    Jun 23, 2005
    Detroitish

    This is correct. What the OP should look for is another 4 Ohm cab, to use with the existing one.
     
  11. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    Very few North American amplifiers do have tapped secondaries on the OPT. It surprised me too when I first got here.
     
  12. So I should find a second 4 ohm cab then? Also what would it run at if I ran the 4ohm and the 8ohm?
     



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