Years ago, this was the only book available to explain the physical principals of television. It's still one of the best. It's written in sort of a hippie political manner ala The Whole Earth Catalog. The premise is that by empowering the people with the power of mass communication, we will create some kind of utopian society. Obviously, things didn't work out that way, but it's still a pretty good introduction to the nuts and bolts of how technology works. This predates digital technology. In fact, the videotape formats it mentions aren't in use anymore. Everything else holds up pretty well. The basic physics is still the same. The book has detailed explanations of vision, electricity, AM & FM broadcasting. It goes into the details of signal switching including waveforms. The illustrations are excellent. Because of this book I have a pretty good understanding of how what I watch ends up on my TV. I only wish someone hadn't stolen my copy!
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