Hello,

The internet archive has a lot of eletronics manuals stored:
https://archive.org/details/electronicsmanuals

Wich is one of the many archives:
https://archive.org/search.php?query=electronics&and[]=mediatype:"collection"

Bertus

 

Hello,

Also if you are interested in the old tube manuals, you can find them here:
https://archive.org/details/vacuumtubemanuals?&sort=-downloads

Bertus

 

Hello,

Here I found a site with a lot of eletronics books:
http://erewhon.superkuh.com/library/Electronics/

The same site has also a lot of other catagories:
http://erewhon.superkuh.com/library/

Bertus

 

http://bama.edebris.com/manuals/

Regards, Dana.