Toptube Video Search Engine



Title:Crystal Radios: No Batteries? No Problem!
Duration:25:06
Viewed:230,461
Published:06-03-2024
Source:Youtube

(To those who swear I've covered this topic before: I have; I just wasn't satisfied with my original video) Remarkably simple and requiring no power source, crystal radios were the primary means of listening to commercial radio broadcasts until the late 1920s and early 1930s, when they were largely superseded by more sensitive tube-based heterodyne and regenerative receivers. However, they continue to be built by hobbyists and are a popular project for teaching children the basics of radio technology. Huge shout-out to Julian Horn and United Nuclear for their invaluable assistance in putting together this video. Check out United Nuclear's fascinating catalogue at: unitednuclear.com Medical Coils/Batteries Video: https://youtu.be/NufNhuWI1iA 0:00 Introduction 0:52 Spark Gap Transmitters 2:02 Coherer Receivers 3:05 Magnetic Hysteresis Detectors 4:38 Reginald Fessenden and the Dawn of AM Broadcasting 5:06 Parallel Tuned Circuits /LC Resonators 6:29 Rectifying/Envelope Detectors 7:23 Hot-Wire Barretter 8:19 Electrolytic Detector 9:18 Early Crystal Detectors 9:50 Crystal Radio Basics 12:17 Cat's Whisker Detectors 12:56 P/N and Metal-Semiconductor Junction Diodes 14:39 Later Crystal Detectors and Diodes 16:26 1923 Ariel Crystal Set 17:11 Self-powered Crystal Radios 17:50 Crystal Radio Optimization and Range 20:52 Foxhole Radios 22:27 Obsolescence of Crystal Radios 23:05 1950s Miniman Rocket Radio 24:18 Outro SOURCES: https://web.archive.org/web/20121228200010/http://www.ieee.ca/millennium/radio/radio_differences.html https://earlyradiohistory.us/1917de.htm https://eng.libretexts.org/Bookshelves/Materials_Science/Supplemental_Modules_(Materials_Science)/Semiconductors/Metal-Semiconductors_Contacts https://www.radiomuseum.org/r/graves_ariel_crystal_set.html https://www.electronics-notes.com/articles/radio/radio-receivers/how-does-crystal-radio-work.php https://www.electronics-notes.com/articles/history/radio-receivers/cats-whisker-crystal-radios-sets.php https://www.nutsvolts.com/magazine/article/remembering-the-crystal-radio



SHARE TO YOUR FRIENDS


Download Server 1


DOWNLOAD MP4

Download Server 2


DOWNLOAD MP4

Alternative Download :