Class A Amps - Harder On Tubes ?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Electric I, Feb 5, 2008.


  1. Electric I

    Electric I Member

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    Do class a amps eat more tubes? Because they run hotter ?
     
  2. rockon1

    rockon1 Member

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    And sometimes above them! My Palomino is idling at 13.5 watts dissapation with of coarse 12 watt tubes. Sounds good and I dont feel like replacing the resistor. I guess its tube life is going to be shorter than most! Bob
     
  3. justonwo

    justonwo Supporting Member

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  4. booj

    booj Member

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    Cathode biased tubes idle hotter, but when a signal is pushed trough them they actually draw less current. (Check it with an AC ammeter) Fixed, or adjustable bias with a grounded cathode draws more current when pushed with a signal.
     

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