Quote Originally Posted by hemmjo View Post
Very interesting. When I was a kid, in the 50's, there was a guy across the street had been a navy radio man in WWII. When it would stop working, he came over with his black case of tubes. Open up the back and change one of two of them and make it work again. I always found that fascinating, still only have a very basic concept of how it all works.
Tubes are black magic. Very cool, but I know very little about their operation in practice. I'd love to have an old tube ratio or something. My grandmother used to have an old floor model TV that had tubes. When you turned it on you'd get sound almost right away, but it would be like 10 minutes before the tubes warmed up and you got a picture.