Originally Posted by OneHitWonder View Post
Looks like television circuit schematics?
When I was in high school, I had to go to a school to get a FCC First Class RadioTelephone Operators License so I could work at radio stations and do double-duty baby-sitting the transmitter and being the DJ or news reporter or sports reporter. I worked my way through high school and college doing that. At school we had to study schematics and memorize charts. I had no idea what I was looking at. But I passed the tests at the FCC on the first try. First the third class, then the second class, and then the first class license. Then one day I am working at a radio station and the transmitter failed and I had to change the "main plate" said the Chief Engineer in a phone call. And I said "what's that?" He talked me through it over the phone. I still have no idea what a main plate is. By the way, that was in 1970.