This direct coupled circuit operates in class AB with good gain. The circuit is powered by 12 V. We found it in a Radio Electronics from October 1963.
This circuit is from the 1983 Intersil Databook. The circuit operates on a 9 V battery and has a...
This circuit, from a 303 Circuits from the 90s, uses a telephone pickup coil as a sensor to...
This circuit came out in a Popular Electronics from December 1995. It is a Wien bridge...