6W Audio Amplifier

303

04:03:25

Op Amp should be an NE5532

published 10 years ago

hurz

10 years ago

For a good bass response, the DC decoupling 60nF cap in your feedback network must be much bigger 1/(2*pi*470Ohm*20Hz)=16.9uF so lets say 22uF.

kaivanveldhoven

10 years ago

@hurz Yeah I know, but the problem is that the output then starts clipping

hurz

10 years ago

It does clipping anyway e.g. @10kHz! No way around to reduce input voltage or reduce gain.

kaivanveldhoven

10 years ago

Damn didn't check that... so how do I solve it Hurz? :)

hurz

10 years ago

As i already said. Cap to 22uF and input voltage lower. Or if input voltage is a must, then reduce gain, but then recalculate the feedback network cap.

hurz

10 years ago

10uF and 2.7kOhm (instead of 470Ohm) will do the job for 1V input http://everycircuit.com/circuit/5527956888223744

kaivanveldhoven

10 years ago

Awesome, thanks dude! Next time I'll spend more time getting my values and calculations right.

bchammer

10 years ago

Sorry if this is a dumb question, but it looks like all three terminals on the POT are connected together, making the POT non-functional?

kaivanveldhoven

10 years ago

@bchammer Dumb or stupid questions don't exist. Look closely at how the pot is connected, yes two of the terminals are directly connected. The other one isn't though, hint: look at the transistor.

bchammer

10 years ago

Yes, I see that now. It's wired a bit differently than when I made my comment. I probably inadvertently edited it before commenting. Sorry for the bogus question, and thanks for the patient answer.

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