Tuning Audio Amp
Connect pulse generator from older post to your audio amplifier. Set volume to something in the middle. Connect oscilloscope to the output of the amp with dummy load.
You will not see ideal square signal in the output, but all these distortions can describe your audio amplifier.
As there are lots of images in this post and big table. So press on the link to read more about audio amp tuning…
To see osciloscope image move your mouse pointer over table cell.
| 50Hz test | |
such image shows that amp didn't pass low frequency signal. The capacitors between stages are too small. (output cap if used can be too small too) |
When cap value is increased, the image is better. |
| 2000Hz test | |
| this ideal signal. | to small amplification in treble |
| very low treble amplification | low amplification in bass |
| Bass boost | low amplification in midle and bass |
| small caps between amp stages | bass amplification is bit higher |
| treble ampification is bit higher | low amplification in some short band |
| resonance | resonance |
Allmost all these pictures you can see by tuning your treble and bass
