Electronic circuit schematics, manuals, books, datasheets. Since Y2K.

30 Apr 2025 -- Up soon.

Data Sheets

Electron valve / vacuum-tube datasheets.

Schematics

Audio equipment galore, including mirror of Schematic-Heaven; professional and consumer electronics; guitar amplifiers and effects pedals, etc. Over 90,000 schematics and technical pages detail tens of thousands of products.