A fun site with free pdf instructions for things made from pvc...
Play Play™ Original 2013 | Furniture Design & Manufacture – De Steyl Quality Furniture | George, Garden Route
pam8403 amplifier circuit diagram - Google Search
A handmade headphone amplifier soldered together without a circuit board, but component to component.
Weber's Smokin Joe tube guitar amp in custom cab.
Home Electrical Wiring Diagrams