MooseFET said:
I hadn't looked at that issue. You are right. Obviously the right
transistors in this circuit are a TIP35C and TIP36C.
That would be only because he din't have a TIP35 and TIP36 in his junk
box.
Those are way to whimpy. You need great big transistors to make it
sound good.
I didn't see a smiley in there, anywhere, but I assume you
are being sarcastic. Lets stick to the actual situation for
a moment. What impedance headphones do you think this unit
was intended for. It may be there in the page, but a quick
look didn't find it. If I assume 32 ohm headphones, a +- 12
volt sine wave would produce about 2.25 watts, electrical, a
huge amount of power for headphones, I think. But the peak
current would still be the bias of 80 mA plus the peak load
current of 375 mA or 455 mA. That is getting pretty far
over the peak of the current gain curve for the 340 350
pair. But quite comfortable for the TIP29,31 pair.
Oh, no, it has to be class-A
For religious reasons?