How VCRs Work

By: Marshall Brain

For the first time in television history, VCRs gave people control over what they could watch on their TV. See more tv evolution pictures.

When you think about the history of television, there are a handful of events that stand out as extremely important. The invention of the black-and-white TV set and the first broadcasts of television signals in 1939 and 1940 were obviously important. Then there is the advent of color TV and its huge popularity starting in the 1950s. There is the rise of cable television and cable channels like HBO and CNN competing with the three big networks in the 1970s. In this same list must certainly go the development and popularization of the VCR starting in the 1970s and '80s.

The VCR marks one of the most important events in the history of TV because, for the first time, it gave people control of what they could watch on their TV sets. Prior to the VCR, there was no such thing as a video store, and when you consider that there is now a video store on nearly every street corner in the United States, you can see what a big impact the VCR has had!


­ The other interesting thing about VCRs is how incredibly intricate and interesting they are inside. They are certainly the most complex mechanical systems most people own outside of their automobiles, yet VCRs can cost as little as $75! ­There are motorized tape loading and ejection systems, complex motorized tape paths, drum-mounted rotating read/record heads... VCRs really are neat inside!

In this article, we will look inside a VCR to understand the basics of its operation, both from a tape transport standpoint and a signal standpoint. Once you have seen what is going on, you will be both amazed and impressed!