must you play music to break in tubes

I have some GE 12ax7 longplate tubes that make some loud crackling noises.  The Seller claimed that this is common with nos tubes and that it will go away after they are broken in, but it is too alarming to hear and sounds risky to the speakers.  Might leaving the amp powered up for a while, but with no signal passing, break them in adequately?  Kind of hate wasting the power tubes lifetimes, but I don't have any old tubes to use in that amp.


New tubes occasionally crackle a little for a couple hours… but at very very low volumes. I have never heard any tubes make sounds loud enough to think of calling or writing about it.

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@yogiboy +1 !!

Bad Preamp Tube Symptoms

There are a few things that are more common when preamp tubes begins to fail. You might experience things like:

  • Crackling
  • Popping sounds
  • Volume loss
  • Squealing
  • Hum or feedback
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