Може да ги слегнете цели книги мислам преку 50 за повеке области од електрониката
On most books you click on the name of the title to download an introduction (the first few pages, usually the title through table of contents) This way you can see if you're interested before downloading many megabytes of data.
General Electrical Engineering Books and Textbooks (pre-1964)
Audio (hi-fi, amplifiers, speakers...)
Radio (transmitters, receivers, design, repair...)
Vacuum Tube theory & circuit design
Test & Measurement (equipment, instructions...)
Passive components (transformers, capacitors...)
Other (transistors, tape recorders, odd stuff...)
http://tubebooks.org/technical_books_online.htm