Schematics are still a part of my daily life.Also old enough to remember when TVs & radios came with schematics.
There's a funky junk/surplus store close to where I live that buys equipment from closing businesses and sells it cheap. Last time I was there, they had about 10 filing cabinets full of Sam's photofacts.Schematics are still a part of my daily life.
I have the schematics for my ADA MP-1 and Microtube 200. that I downloaded years ago. I've lately had an issue with the sound volume coming and going, but I'm not sure if it's my power amp or the pre-amp causing the problem. Both units have 12AX7 tubes in them. I need to get in there with a scope and see what's going on.There's a funky junk/surplus store close to where I live that buys equipment from closing businesses and sells it cheap. Last time I was there, they had about 10 filing cabinets full of Sam's photofacts.
Yes, I have used photofacts. Yes, I am old.

This makes more sense than actual music theory.