Statements (29)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
vacuum tube
|
| gptkbp:alsoKnownAs |
triode
|
| gptkbp:component |
early amplifiers
early radios early telephone repeaters |
| gptkbp:countryOfOrigin |
gptkb:United_States
|
| gptkbp:enables |
electronic amplification
development of electronics industry |
| gptkbp:hasElectrodes |
anode
cathode control grid |
| gptkbp:historicalSignificance |
first electronic amplifying device
|
| https://www.w3.org/2000/01/rdf-schema#label |
Audion vacuum tube
|
| gptkbp:introducedIn |
1906
|
| gptkbp:inventedBy |
gptkb:Lee_De_Forest
|
| gptkbp:material |
glass envelope
|
| gptkbp:patent |
gptkb:US879532A
gptkb:Lee_De_Forest 1908 |
| gptkbp:precededBy |
gptkb:Fleming_valve
|
| gptkbp:principle |
thermionic emission
|
| gptkbp:replacedBy |
transistor
vacuum tube pentode vacuum tube tetrode |
| gptkbp:usedFor |
amplification
detection switching |
| gptkbp:bfsParent |
gptkb:Lee_de_Forest
|
| gptkbp:bfsLayer |
4
|