Problems w/ my Hartke3500

Discussion in 'Amps and Cabs [BG]' started by DryWater'Bass, Aug 10, 2002.

  1. My Hartke 3500 has been making this funny rattling noise...I've had my older brother look at it, and he's thinking it's the tube...Is this conclusion conclusive with the noise?What else could it be if not?
  2. steveg


    Feb 26, 2002
    Madison, WI
    It could be the tube. I'm not familiar with that amp. Can you bypass the tube stage in the preamp? If it has a solid state channel and a tube channel, try the solid state signal path. If the rattling sound goes away, the tube probably has a loose filament.