The Rise and Fall of Dekatron Tubes Before Transistors Took Over

The tunnel diode was once expected to become the future of high-speed electronics. In the late 1950s, this tiny semiconductor could switch at extraordinary speeds and seemed capable of challenging the transistor itself. This video explores the rise and fall of the tunnel diode—from Leo Esaki’s discovery of quantum tunneling in heavily doped germanium to the excitement surrounding ultrafast switching, microwave oscillators, and early computer logic. Discover why major electronics companies invested in tunnel diodes, why engineers believed they could revolutionize computing, and why silicon transistors and integrated circuits ultimately won. We also explore the surprising places tunnel diodes survived, including classic Tektronix oscilloscopes, microwave detectors, precision laboratory equipment, and modern research into resonant tunneling devices. Subscribe for more stories about forgotten semiconductors, vintage electronics, and the technologies that helped build the modern world. #TunnelDiode #SemiconductorHistory #VintageElectronics #QuantumTunneling #TechHistory