A very large archive of various tube and transistor amplifiers and information, mostly for music applications.

Site includes over 100 circuit diagrams, links to related sites, commercial kits and projects, newsgroups and educational areas.

Circuits on solar power, micro power FM broadcasting, and a temperature controlled NICD charger. Some interesting circuits from Forrest Cook. And a few very good electronics links.

A simple yet practical closed caption decoder for your TV.

RS-232 protection and connections schemes. For protecting your Mother Board.

Interactive electronic and electrical circuit analysis and tutorial site.

A nice little archive of some useful circuits.

From the EE program at the University of Washington. Includes circuit models, text files, software.

Electronic and radio schematics, design, theory, and circuit analysis.

The site has not been maintained for more than two years but there is a tremendous amount of information, wisdom and circuits. tubes, transistors, circuits, audio tube and transistor amps are covered.