hi, I'm trying to learn about this so i decide to do the following experiment. http://http://www.allaboutcircuits.com/vol_6/chpt_6/10.html The first circuit i construct is as above. From the explanation i will get a distortion waveform at the output part. But what i get is a nice sine wave. I had inputted 1Khz 2Vp-p sine wave at the input part. The only distortion is get is when i turn the volume (potentiometer) higher. Can someone help me on this. thanks.