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Solid-state audio amplifier complexity vs valve/tube

Discussion in 'General Electronics Chat' started by Elerion, Aug 30, 2017.

  1. audioguru

    audioguru Well-Known Member Most Helpful Member

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    I am glad that you added C3 as a frequency compensation capacitor.
    Since speakers are inductive and present a high impedance at high frequencies, add a zobel network to the output like most amplifiers have.
     
  2. Elerion

    Elerion Member

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    2n2222 and 2n2907 transistors can be replaced by cheaper bc547 and bc557.
    I left the driver transistors Q9 and Q10 as bd135/bd136, even though in this circuit, they handle low current, and dissipate low power. Replacing them by smaller 2n2222/2n3907 deliver a slightly less output voltage.
     

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