Amplifier

130

01:54:25

Several mV amplifier for headphones. It works. Enjoy it! ;)

published 11 years ago

hurz

11 years ago

And what is the output impedance of your AC source you connect it to?

thebugger

11 years ago

Yes the output impedance for headphones is most commonly 16ohm or 32ohm 64ohm. 8ohm is a bit low. Maybe for a speaker but for headphones best guess is 16ohm or 32ohm.

hurz

11 years ago

The output impedance is unimportante, its just bigger or equal than 8Ohm. I was asking about the input which is importante, because in this circuit the neg. feedback can not work for AC! The input AC source is 0Ohm and the cap is also at e.g. 1kHz 3.4Ohm! So the feedback is for AC to low to make this amp linear! It needs around a 1kOhm to take action

richt3r

11 years ago

Okey! :) Put 1k there :)

hurz

11 years ago

For a better amp and better sound, I will do so :)

richt3r

2 years ago

did it work?

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