The Superheterodyne Radio: No really, that's its name Technology Connections : Season 4 Episode 38

The superheterodyne receiver may seem like a radio with a silly name, but in fact it’s a completely logical name that describes the key action these radios take to become excellent radios. The superhet solved a tricky problem in a clever way, and using our friend Algebra (as well as wave phenomena) proved to be the most effective way of tuning in a radio signal.