HackerTube / Video
The Superheterodyne Radio: No really, that's its name
Technology Connections
Technology Connections explains why the superheterodyne radio has its name and how mixing frequencies lets it tune stations well. It walks through the underlying wave phenomena and algebra and why the design solved a hard tuning problem.
HN people use it as the accessible go-to explainer for the superhet trick whenever radios or signal processing come up.
3 Hacker News mentions · 2019–2024