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Tube biasing question

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by daveg777, Oct 8, 2006.

  1. daveg777

    daveg777 Member

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    Fort Worth TX
    I have a cathode biased tweed clone head that came with 6L6's and a 5U4 rectifier. If I swap to EL34's, does the bias have to be reset and must I change to a 5AR4 type rectifier?

    Dave
     
  2. WaltC

    WaltC Member

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    Almost certainly yes to the first question and no to the second (unless you want to use the 5AR4/GZ34 of course<G>).
     
  3. daveg777

    daveg777 Member

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    Would it cause damage to my amp if I made the swap and didn't re-set bias? Sorry for my ignorance


    Dave
     
  4. WaltC

    WaltC Member

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    Yeah! That's what I was trying to say <G>

    Walt
     
  5. kt77

    kt77 Member

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    Jul 6, 2006
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    Peenemunde CA
    check yer PT temp if you pop those '34s in there...they draw a LOT more heater current
     

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