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Headphone amp circuit - Help

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You will very likely have oscillation problems on the breadboard from reading the article. You will have large capacitive coupling between the + and - inputs due to the structure of the breadboard. I did not know you couldn't use an op amp, sorry.
 
It is a very lousy amplifier. Read what I said about it in the other thread.
 
audioguru,
You little amplifier needs emitter resistors to prevent the transistors from going in to thermal runaway.
 
Hero999 said:
audioguru,
You little amplifier needs emitter resistors to prevent the transistors from going in to thermal runaway.

Probably not?, as it's under-biased - particularly if the bias diodes are thermally coupled to the output transistors. But really it's a just a piddling little amp, based on the minimum component count.
 
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