Electronics · Recorded milestone
Triode amplifier
Recorded year1906
Lee de Forest's Audion amplifies weak signals, enabling radio, long-distance phones and early computers.
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Led to
- Transcontinental telephoneRecorded · 1915enables
- Active sonarRecorded · 1918enables
- Broadcast radioRecorded · 1920enables
- Home radio setRecorded · 1920enables
- ThereminRecorded · 1920enables
- Quartz oscillatorRecorded · 1921enables
- Reflection seismologyRecorded · 1921requires
- ElectroencephalogramRecorded · 1924requires
- Electric record playerRecorded · 1925enables
- Electrical recordingRecorded · 1925enables
- ElectrosurgeryRecorded · 1926enables
- Electronic televisionRecorded · 1927requires
- Quartz clockRecorded · 1927enables
- Sound filmRecorded · 1927enables
- Car radioRecorded · 1930enables
- Radiosonde weather balloonRecorded · 1930enables
- CyclotronRecorded · 1932enables
- Radio astronomyRecorded · 1932requires
- Magnetic tape recordingRecorded · 1935enables
- RadarRecorded · 1935enables
- Baby monitorRecorded · 1937enables
- Elektro the talking robotRecorded · 1939enables
- Codebreaking machinesRecorded · 1940requires
- Atomic bombRecorded · 1945requires
- ENIACRecorded · 1945enables
- Night-vision scopeRecorded · 1945enables
- NMR spectroscopyRecorded · 1946requires
- TransistorRecorded · 1947enables
- Radiocarbon datingRecorded · 1949requires
- Robot tortoisesRecorded · 1949enables
- Electronic abstract imagesRecorded · 1950enables
- First speech recogniserRecorded · 1952enables
- PhototypesettingRecorded · 1953enables
- Nuclear power plantRecorded · 1954requires
- First satelliteRecorded · 1957requires
- ICBMRecorded · 1957requires
- Keeling curveRecorded · 1958requires
- Tennis for TwoRecorded · 1958enables
- Pulsars discoveredRecorded · 1967requires
- Messages for alien mindsRecorded · 1972requires
Sources & evidence
Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.