To add: both Self and Cordell would say that the higher the bias of the amp, the lower the (crossover) distortion. At the limit you increase the bias until the amp runs in class A which has, generally speaking, lowest crossover. Still not zero. All competent amp designers would say this; it's basic engineering.
So this has nothing to do with the elcap issues we were discussing.
Jan
Hi Jan,
From experience and empirical measurements, I have to disagree slightly with that.
Distortion drops with increasing bias current in many amplifiers up to a certain point, the "happy spot" for that amplifier. Then it remains essentially constant, or you begin to see power supply artifacts in the output as you increase bias current. My takeaway is that beyond a certain level of bias current, anything added is wasted as heat and reduced lifespan. One amplifier's happy spot was 5 mA of bias current (A Symasym built with matched parts).
For things like these, throw away SPICE and measure real products under normal conditions using real test equipment. For you Jan, I know you are very good at testing real amplifiers.
Nope, it hasn't a thing to do with capacitors at all.
From experience and empirical measurements, I have to disagree slightly with that.
Distortion drops with increasing bias current in many amplifiers up to a certain point, the "happy spot" for that amplifier. Then it remains essentially constant, or you begin to see power supply artifacts in the output as you increase bias current. My takeaway is that beyond a certain level of bias current, anything added is wasted as heat and reduced lifespan. One amplifier's happy spot was 5 mA of bias current (A Symasym built with matched parts).
For things like these, throw away SPICE and measure real products under normal conditions using real test equipment. For you Jan, I know you are very good at testing real amplifiers.
Nope, it hasn't a thing to do with capacitors at all.
