I found this website that saves many of the old schematics and pictures from the past. It’s called techpreservation.dyndns.org and this link shows only the ones beginning with L. I’m sure that there are many more, such as the ones beginning with J for Joule Thief.
I see many of the schematics and pictures that I blogged in my late, great watsonseblog. I also see some of Quantsuff’s schematics. Later I did a lot of perusing and found many pictures of antique radios. I also found pictures of the early computers such as the Whirlwind. Other interesting pictures, such as schematics of various electronic devices, including Heathkit stuff.