While there are Class-D amps now, the LM386 remains the king of "simple." The PDF likely shows the "gain=200" configuration with a Zobel network (resistor-capacitor to ground).
Furthermore, the "practical" aspect of this collection is its defining feature. Unlike theoretical textbooks that might present ideal circuits in a vacuum, practical circuit books address the realities of component tolerances, power dissipation, and environmental noise. The circuits presented in such collections are typically "tried and tested," meaning they are proven to work under real-world conditions. For the hobbyist working in a garage or the technician troubleshooting a device in the field, this reliability saves time and resources. It shifts the focus from "how to calculate the current" to "how to make the device work," a crucial mindset for professional development. 1001 more practical electronic circuits pdf work
: The 698-page book features a compilation of 1,001 individual circuits using both discrete transistors and integrated circuits (ICs). Ready-to-Use Schematics While there are Class-D amps now, the LM386
Master Handbook of 1001 Practical Electronic Circuits - Amazon.com The circuits presented in such collections are typically
A flawed but fondly useful fossil—like a hammer that’s seen better days but still drives nails. For $0–10 (as a PDF reprint), it’s worth keeping on your virtual workbench.
Most introductory books give you 10 circuits. Advanced books give you 1,000 pages of theory. The 1001 More Practical Electronic Circuits sits in the sweet spot of applied knowledge.
and is structured to help users quickly find and implement specific circuit designs. Amazon.com Circuit Diagrams